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    Volume 40,2021 Issue 5
      专题研究
    • NIU Xiao-lu, LIU Fei, FENG Guang-ying, MAO Xiao-hong

      2021,40(5):835-858, DOI:

      Abstract:

      The Late Silurian to Early Devonian potassic alkaline rocks on the northern margin of the North China Craton (NCC) is a key geological unit to understand the interaction processes of the Paleo-Asian Ocean and the NCC in the Paleozoic. In this paper, we report new zircon U-Pb age, mineral chemistry, whole-rock geochemistry and Sr-Nd isotopic compositions from the Late Silurian potassic Huangheshao (HHS) syenties on the northern margin of the NCC, and discuss its petrogenesis. Sensitive high-resolution ion microprobe (SHRIMP) zircon U-Pb dating has revealed a crystallization age of 417.6±4.7 Ma for the HHS pluton. Alkali-feldspar syenite is the main rock type; Aegirine-augite and sanidine (An0Ab2~5Or95~98) are the major minerals, with subordinate albite (An0Ab95~100Or0~5). Aegirine-augites locally transferred into winchite or magnesio-riebeckite. The HHS syenites have high total alkali contents (Na2O+K2O=12.79%~15.30%),high Rittmann index (σ=8.48~11.09), high K2O contents (8.66%~13.78%), and high K2O/Na2O ratios (2.10~9.07), suggesting their alkaline, potassic-ultrapotassic affinity. High Sr abundances and radiogenic Sr isotopic compositions (initial 87Sr/86Sr=0.704 1~0.706 1) argue for an enriched subcontinental lithospheric mantle (SCLM) source for the HHS magmas,which was previously metasomatized by melts/fluids from the subducted sediments on the down-going oceanic crust. The development of the Late Silurian to Early Devonian potassic alkaline rocks on the northern margin of the NCC indicates that the Paleo-Asian oceanic slab had subducted beneath the NCC in the Early Pleozoic, and the subducted materials metasomatised the SCLM, forming a phlogopite/K-amphibole-bearing, fertile mantle source. During the end of the Late Silurian to Early Devonian, due to the accretion or collision of a microcontinent, the northern margin the NCC has entered into a temporary, post-collisional extension tectonic setting.

    • JIA Bin, WEI Li-yong, WU Huan-huan, ZHANG Zhen, TANG Wei-dong, LIU Tian-hang, CHAI Chen-hui, MENG Wu-yi

      2021,40(5):859-873, DOI:

      Abstract:

      This paper studies the formation age and geochemical characteristics of the volcanic rocks of the Manketouebo Formation in the Horqin Right-Front Banner area, Inner Mongolia. The LA-ICP-MS zircon U-Pb dating of two typical rhyolite samples reveals that the eruption occurred in the Late Jurassic (145.9±1.0 Ma and 146.0±1.3 Ma, respectively). The volcanic rocks of the Manketouebo Formation in the study area belong to the peraluminous, high-potassium calcium-alkaline series, with high SiO2 (63.28%~77.40%, with average of 71.06%) and total alkalis (7.52%~10.14%, with average of 8.66%). The trace element patterns are characterized by enrichment of large ion lithophile elements (e.g., Rb, K) and depletion of high field strength elements (e.g., Nb, Ta, Ti, P), showing the typical characteristics of crust-derived magma. The rhyolite and trachyte in Manketouebo Formation have a good evolution trend in the major and trace elements. It is speculated that the crust-derived material was partially melted and erupted after different degrees of fractional crystallization. Besides, the volcanic rocks have similar geochemical characteristics of post-orogenic magmatism. Combined with the temporal and spatial distribution that the ages of the Manketouebo Formation in the Da Hinggan Mountains increase from southwest to northeast, it is proposed that the volcanism of this period is closely related to the post-orogenic extension after closure of the Mongol-Okhotsk Ocean.

    • ZHOU Shan, MENG Fan-xue, XIE Shi-wen

      2021,40(5):874-896, DOI:

      Abstract:

      The Mesozoic granites, especially Late Jurassic, are widely distributed in Jiaobei terrane. To further understanding the formation age, genesis and geodynamic background of these granites has great significance to the crustal evolution of study area. In this paper, the major and trace elements, zircon U-Pb ages and O isotopes of the Jurassic granites in the eastern and northern Jiaobei terrane are reported. The results show that the zircon U-Pb ages of the granites studied in this paper are mainly distributed between 166 Ma and 156 Ma, representing the crystallization age of the granites. In addition, there are a large number of inherited zircons with age peaks of 3 650~3 294 Ma, 2 660~2 445 Ma, 770~600 Ma and 245~197 Ma. These granites shown adakite-like geochemical characteristics. The formation ages and geochemical characteristics of Jurassic granites in this study are similar to those of Linglong and Luanjiahe Jurassic granites from western Jiaobei terrane, indicating a similar source from partial melting of thickened continental lower crust. Furthermore, based on the variation of the U-Pb age and O isotope of inherited zircons from different samples, we concluded that the Jurassic granites in Jiaobei terrane have multiple sources, some of them derived from the thickened continental lower crust in Jiaobei terrane and the others from subducted Yangtze block. Then, the subduction of Paleo-Pacific or Izanagi plate might play a direct or indirect role in causing the partial melting of the thickened continental lower crust.

    • BAI Dao-yuan, LI Bin, ZHOU Chao, SUN Ji, WEI Fang-hui, ZENG Guang-qian, JIANG Wen, LI Yin-min, JIANG Qi-sheng

      2021,40(5):897-922, DOI:

      Abstract:

      The Jiangnan Orogen in Hunan is an important gold metallogenic belt. There are debates about the gold ore-forming ages and geological settings of the belt. According to the ages of magmatic rocks and deposits, as well as geological charateristics of deposits, metallogeny and ore-forming fluids and regional tectonic evolutions, the authors analysed the metallogenic ages of every major ore concentration area in the Jiangnan Orogen in Hunan, and then defined the gold mineralization events and their ages, probed into the tectonic settings of the events. The following preliminary ideas are put forward. There occurred mainly three gold mineralization events in Jiangnan Orogen such as Caledonian, late Indosinian and Yanshanian. The Caledonian gold deposits with ore-forming age of 430~410 Ma (late Silurian) were located in the three areas, such as the middle-southwestern segment of Xuefeng thrust-fault zone, the eastern segment of Xuefeng thrust-fault zone, and northeastern Central-Southeastern Hunan tectonomagmatic belt in the same time, with ore-bearing strata Banxi Group, Lengjiaxi Group and Lengjiaxi Group respectively. Gold mineralization in the first two areas was related with metamorphism, deformations and structural activation caused by Caledonian Movement, while in the last area was related with the thermal energy and hydrotherm provided by late Silurian granitic magmatism. The late Indosinian gold deposits with ore-forming age of 227~202 Ma (Late Triassic) took place mainly in southeastern Xuefeng tectonomagmatic uplift zone in Indosinian, and were related with the thermal energy and hydrotherm caused by post-collisional granitic magmatism. The Yanshanian gold deposits with ore-forming age of 152~130 Ma (Late Jurassic-initial Early Cretaceous) were mainly took place in east part of southeastern Xuefeng tectonomagmatic uplift zone in the same time, and were related with the granitic magmatism in extensional environment.

    • ZHU Li-gang, JIN Song, WANG Chun-lian, SHANG Peng-qiang, GAO Li-yong, WANG Zhan-bing

      2021,40(5):923-938, DOI:

      Abstract:

      The Pucheng district is located in Wuyi metallogenic belt, which is in the northern part of the northwest Fujian uplift zone, consisting of more than 30 fluorite mines (mineralization spots). We take Waiyang fluorite mine, Nanshanjian fluorite mine, Lichu fluorite mine, Longtouyang fluorite mine and Renfeng mineralization spot as the main research examples in this study. The geochemical analysis of fluorite and monzonitic granite hosting rocks were carried out. The fluorite ore has massive, banded, vein-like structure. It mainly includes fluorite-type ore and quartz-fluorite type ore. The ΣREE content of fluorite ranges from 12.22×10-6 to 154.44×10-6, the Y content is between 5.68×10-6 and 114.90×10-6, the ratio of LREE/HREE in fluorite ranges from 1.10 to 4.67, (La/Yb)N ratio ranges from 0.85 to 5.04, δEu ratio ranges from 0.55 to 1.05, and δCe ratio ranges from 0.73 to 0.95. The ΣREE content of monzonitic granite ranges from 74.13×10-6 to 340.42×10-6, the Y content ranges from 15.37×10-6 to 90.49×10-6, LREE/HREE ratio in hosting rock ranges from 1.54 to 15.47, (La/Yb)N ratio ranges from 0.85 to 42.51, δEu ratio ranges from 0.10 to 0.72, and the δCe ratio ranges from 0.36 to 1.64. The monzonitic granite is peraluminous with high-potassium calc-alkaline characteristic, and is enriched in large ionic lithophilic elements (Rb) and high field strength elements (U and Th), and depleted in high field strength elements (Zr). The REE normalized pattern shows a gentle right curve, and plots into plate granite (WPA). I-type granite has a strong relationship with the fluorite mineralization. Monzonitic granite is enriched in F, which is the main source of fluorite mineralization. The fluorite in the study area was formed in a hydrothermally-generating low-temperature reduction environment. The fluorite deposit occurred in the NE trending fault zone, which also has undergone at least two phases of fluorite mineralization.

    • 综述与进展
    • HE Zhen-yu, YAN Li-li

      2021,40(5):939-951, DOI:

      Abstract:

      The magmatic system of large silicic volcanic eruptions (with ejected volumes of about 102~104 km3) extends through the crust, comprising complex generation, transport, storage, recharge and eruption processes. Critical aspect for understanding the evolution of silicic volcanic system is to reveal the magmatic processes from melt generation to eruption, such as crystal fractionation, crystal accumulation, crystal-melt segregation, crustal assimilation, magma recharge and mush rejuvenation. Zircon incorporates a variety of trace elements, such as Th, U, Ti, Hf and rare earth elements, and their abundances and variations are particularly sensitive to the composition, temperature, oxidation state, water content of the magma and the co-crystallized phases. Therefore, zircon has the outstanding capacity to record the evolution of silicic magmatic system. In general, as the falling temperature of the melt, the Hf concentration increases and the Ti concentration and Th/U, Eu/Eu* and Zr/Hf ratios typically decreases, which are effective indicators of fractionated magmas. Zircon from porphyry intrusions associated with mineral deposits tends to have high Ce4+/Ce3+ and Eu/Eu* ratios, indicating strong oxidized conditions and high water concentration. Zircon can show characteristics of multistage crystallization with a core-rim structure, including distinctly resorbed core and CL-bright rim. Compared to the zircon core, CL-bright rim commonly shows lower Hf and U and higher Ti and Eu/Eu* ratios, indicating magma recharge event and the rejuvenation of crystal mush. Due to the mobility of smaller zircon relative to the larger crystals, zircon may continuously be mobilized in extracting melts recording a continuous compositional range of magma evolution, but may also remain in the crystal mushes indicating crystal-melt segregation events. Zircon trace element compositions integrated by high-precision zircon U-Pb geochronology can track the evolution of silicic volcanic system as a function of time. Metamictization, sector zoning and exotic mineral inclusions should be considered to screen magmatic trace element signatures and interpret the zircon trace element data. Careful examination of thin sections of rock to find zircon occurring and associated minerals is also important to track the multiple evolution of silicic volcanic system.

    • ZHU Jian-jiang, ZHANG Li-fei, ZHANG Lu

      2021,40(5):952-964, DOI:

      Abstract:

      As a link between the earth's surface and its deep interior, the subduction zone is the primary tool to bring surface carbon into the deep earth and the principal place to exchange surface and in-depth materials. Subduction can bring surface carbon into the deep earth in organic carbon or inorganic carbonate minerals and then return to the surface system through volcanism or degassing. The deep carbon cycle in the subduction zone controls the surface carbon flux, which is of great significance for studying global climate change and the earth's habitability. This paper discusses the mechanism of carbonation and decarbonation in the subduction zone. The decarbonation mechanism includes decarbonizing metamorphic reaction, carbon dissolution, and melting decarbonizing. Carbon bearing fluids released from the subducting plate may not always migrate back to the surface. Some of them will react with the surrounding rocks (carbonation) to form other solid carbon phases (carbonate, graphite, or diamond), sequestrated in the subducting plate and overlying mantle wedge. This process will affect the carbon fluxes in different reservoirs and should be considered when the carbon flux released from the subduction zone is calculated.

    • LI Rui-qin, LIU Cheng-lin, LOWENSTEIN T K

      2021,40(5):965-976, DOI:

      Abstract:

      Tufa has a scientific research value. There are wide distributions of the tufa mounds in the north, middle and southwest of Searles Lake, California, USA. The tufa mounds range from a few centimeters to 45 m in height, and most are 5 to 12 m high. There are four tufa facies can be identified from the mounds, including porous spongy tufa facies, nodular tufa facies, columnar tufa facies and finely-laminated crusts tufa facies. In terms of tempo-spatial distribution, there are two sequences of tufa deposition, including porous spongy tufa facies to nodular tufa facies to finely-laminated crusts tufa facies to porous spongy tufa facies and porous spongy tufa facies to columnar tufa facies to finely-laminated crusts tufa facies to porous spongy tufa facies. These tufa mounds mainly consist of calcite and aragonite. On the microscopic scale, these tufa facies dominantly make up nano-shperes and rod-like crystals, interpreted to be the activities of microorganism, such as bacterial. The values of δ13C in the tufa facies were measured, and the results were positive, proving that the tufa of Searles Lake is the thermogene tufa. The discussion on the main sedimentary types and genesis of tufa in Searles Lake can provide comparative reference for the study of tufa in China.

    • 宝玉石矿物学
    • HUANG Qian-xin, WANG Shi-qi, LIANG Guo-ke, YANG Xiao-dong, WU Xiang-ke

      2021,40(5):977-990, DOI:

      Abstract:

      Following the discovery of Luodian nephrite and Dahua nephrite, another nephrite mineral spot was also found in Bama, Guangxi, which also belongs to Qian-Gui area. Analysis methods, such as orthogonal polarization microscope, X-ray powder diffraction, electron probe microanalysis and artificial heavy concentrate, were employed to study petrographic characteristics, mineral composition, color-forming factors and the genesis. These studies show that the main mineral composition of Bama nephrite is microcrystalline tremolite or actinolite, and other minor minerals, such as talc, limonite, kaolinite, etc. Bama nephrite shows felty structure,bundle structure and structure of the pattern of aquatic plant. Spots of Mg/(Mg+Fe2+)-Si of Bama nephrite plot into tremolite or actinolite. The hardness of Bama nephrite is between 5.19~5.32, the denstity is between 2.81~3.00 g/cm3, the refractive index is about 1.61. Talc, auxiliary mineral of Bama nephrite, is the cause of lower hardness. According to the electron probe data, the relevant chemical formulas of Bama jade were calculated and compared and analyzed, we found that the green color of Bama nephrite is related to 0.08~0.67 a.p.f.u of Fe in C site in tremolite, which suggests that the increasing content of Fe in C site in Bama nephrite leads to change of the colors of nephrite from light purple to dark green. The data of X-ray powder diffraction show that goethite was in the structure of the pattern of aquatic plant, implying that the structure of the pattern of aquatic plant of Bama nephrite was formed on the surface of the earth. Through field observation, the comprehensively analysis of major elements, rare elements and rare earth elements, and comparison with related features of other mine point, the authors consider that the genetic type of Bama nephrite deposit is belongs to stratabound and contact metasomatic magmatic hydrothermal deposit, which is result-ed from the magmatic hydrothermal contact metasomatism induced by diabase intruding into carbonate rock. Bama nephrite is the same genetic type with Luodian and Dahua nephrite deposits in Qian-Gui area which have been found in previous study. They are belong to the same ore belt.

    • 环境矿物学
    • XIAO Min, CHEN Yong-zheng, ZHAO Shan, ZHANG Yu-ge, JI Ying, LI Shi-feng

      2021,40(5):991-1000, DOI:

      Abstract:

      Soil pollution by heavy metal has been gradually serious in facility agriculture. Due to the interaction of soil minerals, organic matter and microorganisms at natural condition, the combination mechanism between soil single component and heavy metal couldn't represent the reality of the translocation and transformation of heavy metal in the soil. In this research, mechanical mixture of montmorillonite and kaolinite (Mont:Kao=1:1), Gram-positive(Bacillus subtilis, B.s) and Gram-negative (Pseudomonas putida, P.p), and humic acid (HA) were selected as phyllosilicates mineral in vegetable greenhouse and farmland soil, organic matter and bacteria respectively. Cd2+ and Cu2+ were taken as the target compounds. The adsorption mechanism and interaction on the binding of Cd2+ and Cu2+ by the ternary composites of Mont/Kao-HA-bacteria were investigated by macroscopy sorption together with XRD, ATR-FTIR and SEM. The experimental results showed that heavy metal ions had the additivity of sorption on Mont/Kao-HA or Mont/Kao-bacteria system, while the antagonism between heavy metal ions and the ternary Mont/Kao-HA-bacteria system. The kinetics data of Cu2+ adsorption on mesoporous goethite fitted well the pseudo-second-order equation. The maximum Cu2+ adsorption capacities followed the order:B.s > P.p > Mont/Kao-B.s > Mont/Kao-P.p > Mont/Kao-HA-P.p > Mont/Kao-HA > Mont/Kao.

    • YE Hai-yan, DONG Fa-qin, BIAN Liang, HE Hui-chao

      2021,40(5):1001-1009, DOI:

      Abstract:

      The typical characteristics of Sichuan Basin atmosphere are high humidity and weak mobility, where haze is easily formed during the winter and spring seasons. Here, the interactions system of quartz and calcite nanoparticles with toluene and Cr3+ in low temperature and high humidity conditions were systematically investigated. Based on the changes in the Zeta potential, colloid size and aggregated morphology, hydrophilic and hydrophobic properties after the quartz and calcite particles coupling with toluene and Cr3+, we modeled that:① Since a significant inter-coupling effect between the toluene and Cr3+ with quartz and calcite, the presence of toluene and Cr3+ can greatly reduce the Zeta potential of quartz and calcite particles in high humidity environment, and results in the instability of quartz and calcite particles at low temperature; ② By its electrostatic force, Cr3+ can promote quartz and calcite particles to form agglomerated colloids with larger particle size in high humidity environment; ③ Toluene adsorbed on quartz and calcite particles can enhance their hydrophobicity, and thus weaken the disturbance of water on the stability of quartz or calcite particles-based colloids. The aforementioned findings could provide positive enlightening significance for understanding the mechanism of haze formation in Sichuan Basin from the angle of the inter-coupling of quartz and calcite particles with toluene and Cr3+.

    • 方法与应用
    • YOU Fu-hua, JIANG Jiao-jiao, ZHANG Jin-zhang, LAI Xiao-dan

      2021,40(5):1010-1022, DOI:

      Abstract:

      The Ashele Cu-Zn deposit in Xinjiang is a typical volcanic massive sulfide deposit. In recent years, mineral exploration has been extended to the depth and the periphery. The traditional geophysical and geochemical exploration methods are not effective in mineral exploration as the small thickness and large buried depth of the orebody. It is urgent to find a quick and effective mineral exploration method. This paper introduces the application of short wave infrared (SWIR) technique in the exploration of the Ashele Cu-Zn deposit. The results show that the muscovite closely related to orebody or mineralization has an Al—OH absorption peak position of less than 2 205 nm and is characterized by Al-rich; and that the chlorite closely related to orebody or mineralization has Fe—OH absorption peaks concentrating at 2 250 nm and shows Mg-rich characteristics. The crystallinity of muscovite increases gradually from the south to north, indicating that the hydrothermal fluid (mineralization center) was mainly from the north. The SWIR can identify the alteration minerals quickly and effectively, which is useful to determine the alteration mineral assemblages and reveal the regularity of alteration zoning. The wavelength of absorption peak of muscovite and chlorite and crystallinity of muscovite can be used as new prospecting symbols of the Ashele Cu-Zn deposit.

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    Volume 40,2021 Issue 5
      专题研究
    • ZHANG Li-cheng, WANG Yi-tian, CHEN Xue-feng, MA Shi-qing, WANG Zhi-hua, YU Chang-fa

      2013,32(4):431-449, DOI:

      Abstract:

      The Hongyuntan iron deposit is hosted in pyroclastic rocks of the Lower Carboniferous Yamansu Formation. The ore bodies occur as layers, stratoid bodies or lenses. The principal ore mineral is magnetite, together with minor maghemite, specularite, pyrite and trace chalcopyrite. The gangue minerals include garnet, diopside, actinolite, chlorite, tremolite, epidote, biotite, albite and quartz. The ore structures are mainly of massive and disseminated forms, with occasional banded or veined forms. The ore textures are of subhedral-anhedral granular and metasomatic types. The wall rock alteration shows symmetrical zoning, and the alteration colors change from dark to light from ore bodies outwards. On the basis of observed mineral assemblages and ore fabrics, two periods of ore deposition were recognized, i.e., skarn period and hydrothermal ore-forming period, which could be further subdivided into four metallogenic stages, namely skarn stage, retrograde alteration stage (main ore-forming stage), early hydrothermal stage and quartz-sulfide stage. Electron microprobe analyses show that the end member of garnet is mainly andradite-grossularite. The composition of pyroxene is mainly diopside-asteroite. The amphiboles is composed mainly of actinolite and tremolite with minor magnesiohornblende. The composition of these skarn minerals suggests that skarn in the Hongyuntan iron deposit is calcic skarn, belonging to metasomatic skarn. The characteristics of main and trace elements suggest that the formation of magnetite was closely related to the skarn. In combination with geological characteristics, the authors suggest that the skarn might have resulted from interaction between Ca-rich pyroclastic and Fe-rich magmatic hydrothermal fluid which was transported along the fault system. The formation of magnetite was hence related to the regressive metamorphism of the skarn.

    • Gan Guoliang Yichang Institute of Geology, Mineral Resources, Chinese Academy of Geological Sciences Department of Grologicol, Atmospheric Sciences, lows State Univeraity, Ames, IAS0011, U.S.A

      1993,12(2):144-181, DOI:

      Abstract:

      This paper presents partition coefficients of 69 chemical elements (Li, Rb,Cs, K, Na, Ca, Ba, Sr, Mn, Fe, Mg, Cu, Pb, Zn, Co, Ni, Be, La, Ce, Nd,Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, Cr, In, Ga, Al, B,Cd, Sb, Bi, U, Th, Zr, Hf, Si, Ti, Ge, Sn, Mo, Nb, Ta, W, V, P, F, Cl,S, N, O, C, As, Pu, Re, Os, He, Ne, Ar, Kr and Xe) and the univalent radical (OH) in 28 minerals (olivine, clinopyroxene, orthopyroxene, amphibole,biotite, Phlogopite, plagiocla-se, K--feldspar, quartz, magnetite, ilmenite, garnet,zircon, apatite, allanite, topaz, sphene, cordierite, hauyne, leucite, nepheline,whit-lockite, brookite, petovskite, melilite, armalcolite, spinel and rutile) from 8 types of rocks, namely metaluminous (ultra) basic rock, peralkaline (ultra) basic rock, metaluminous intermediate rock, peralkaline intermediate rock,metaluminous acid rock, peralkaline acid rock, peraluminous acid rock and ultra-acid rock. It is found through an integrated ahalysis and comparison that the composition and structure of minnerals and melts seem to be the most important factors controlling mineral-melt element partitioning. Importanceshould be attached to minral structure and Al-supersaturation of melt which have, not been discussed by research workers. Finally, the present state and theproblems to be solved in the study of mineral--melt element partition coefficients are analysed, and the future trends of this research field are predibted.

    • 综合资料
    • SHEN Qi-han

      2009,28(5):495-500, DOI:

      Abstract:

      This paper has mainly recommended a mineral abbreviation list (see Table 2 and Table 3). Table 2, which contains 243 minerals, was compiled by IUGS Subcommittee on the Systematic of Metamorphic Rocks (SCMR) in 2007. The author selected other 29 minerals and, on such a basis, formulated Table 3. Thus, the total mineral abbreviations come to 272. It is hoped that they can be popularized in future and become more and more perfect through utilization, so as to provide a basis for ultimate standardization and unification.

    • 专题研究
    • HE Shi-ping, WANG Hong-liang, XU Xue-yi, ZHANG Hong-fei, REN Guang-ming

      2007,26(4):295-309, DOI:

      Abstract:

      Early Paleozoic volcanic rocks in Tianshui and Baoji areas along the eastern segment of North Qilian orogenic belt consists of Hongtubu basaltic lavas and Chenjiahe intermediate-acid volcanic rocks. Geochemical analyses show that Hongtubu basaltic lavas are similar to the intercalated basalts in Chenjiahe intermediate-acid volcanic rocks in characteristics, both fallen in the tholeiite series with high TiO2 (1.50%~2.73%). Their∑REE are 65.97×10-6~133.46×10-6 and 78.04×10-6~175.55×10-6 respectively, both are slightly enriched in LREE [(La/YbN being 2.00~4.40 and 2.71~4.40 respectively],and both have no obvious Eu anomaly or weak Eu negative anomaly(δEu being 0.85~1.10 and 0.85~0.99 respectively). Basalts from two groups are typically characterized by selected enrichment of LILEs, low abundances of HFSEs relative to NMORB, and prominent troughs of Nb and Ta, with low Nb/La ratio(0.28~0.43), which indicates the affinity of these volcanic rocks to island arc tholeiite(IAT). In addition, εNd(t)(+2.22~+4.08)values of basalts suggest that their mantle sources are similar to the depleted mantle source. Zr/Nb=17.21~36.33 and Ce/Nb=5.73~8.17, implying geochemical characteristics of N-MORB. Sr, Nd and Pb isotopes from Hongtubu basalts are similar to those in Chenjiahe basalts in composition. In the diagrams of εNd(t)-(87Sr/86Sr)t, (207Pb/204Pb)t-(206Pb/204Pb)t,(87Sr/86Sr)t-(206Pb/204Pb)t and εNd(t)-(206Pb/204Pb)t for basalts, the data are fallen in the DM, EMⅠand EMⅡ areas, probably with a little crustalontamination, indicating that the magma of basalts might have had a mixed gin.Thentermediate-acid volcanic rocks from Chenjiahe belong to the calc-alkaline series,they have relatively high abundances of REE∑REE=127.51×10-6~276.01×10-6), and are significantly enriched in LREE[(La/YbN= 4.79~13.51]. Most intermediate-acid volcanic rocks show weak Eu negative anomaly (δEu=0.53~1.20). The trace element patterns of Chenjiahe acid volcanic rocks are similar to those of the ocean ridge granite (ORG), with marked troughs of Nb, Ta, Zr and Hf. A synthetic study shows that the Chenjiahe intermediate-acid volcanic rocks in the eastern segment of North Qilian orogenic belt were formed in an island-arc setting, whereas the Hongtubu basalts were formed in an intra-arc rift setting (or an initial back-arc basin setting), probably being products of the early spreading evolution of the island_arc system towards the back-arc basin in the eastern segment of North Qilian during late Early Paleozoic. The results obtained provide evidence for the existence of the trench-arc-basin system at the juncture of Qilian and North Qinling orogenic belts.

    • 宝玉石矿物学
    • YAN Ruogu, QIU Zhili, DONG Chuanwan, LI Liufen

      2009,28(3):292-298, DOI:

      Abstract:

      High grade black jadeite is a kind of upscale and fashionable jade material that has become one of the jadeites characterized by fastest growing values in the past 20 years. Based on a comparison of mineralogical and geochemical characteristics between black jadeites (inky black jades)from different producing areas of the world, the authors hold that the black jadeites currently on the market can be mainly classified into jadeite jade, omphacitic jadeite jade and hornblende jade whose main components are jadeite, omphacite and dark green hornblende respectively. They include black chicken jade, ink jadeite and black kosmochlor from Myanmar and jade negro and galactic gold from Guatemala, with black chicken jades similar to those from Myanmar also seen in Japan and Kazakhstan. The research results suggest that the main mineral composition, jade structure and inclusion characteristic combinations of black jadeite jades from different producing areas have their respective typomorphic natures, which can be used as the distinctive characteristics for their sources.

    • 综述与进展
    • ZHANG Wei

      2014,33(4):747-762, DOI:

      Abstract:

      Cordierite is a mineral material characterized by low thermal expansion coefficient and good thermal shock resistance. Cordierite mineral material is relatively rare in nature, so cordierite is synthesized usually by the method of artificial synthesis. Based on the newest investigation results of synthetic cordierite, this paper deals with the progress of researches on such synthesis methods of cordierite as high purity oxide solid reaction at high temperature, natural mineral solid reaction at high temperature, the utilization of industrial wasted materials, the employment of agricultural wasted materials, the sol-gel and the low-temperature combustion synthesis. At present, the method of natural mineral solid reaction at high temperature is used for the preparation of cordierite in industry. In spite of a lot of advantages, this method also has many disadvantages. Therefore, the development trend of cordierite synthesis seems to solve the problem as to how to apply other synthesis methods to industrial preparation.

    • 专题研究
    • CAO Guang-yue, XUE Huai-min, WANG Jin-guang

      2014,33(6):1019-1038, DOI:

      Abstract:

      In this paper,LA-ICP-MS zircon U-Pb dating was carried out for four samples of volcanic rocks from Qingshan Group in Jiaodong area and, as a result, their concordant ages were obtained, which are 119.4±0.9 Ma, 118.2±1.0 Ma,120.2±0.9 Ma and 120.0±0.8 Ma, respectively. The results show that all the volcanic rocks in Jiaodong area were formed from about 120 Ma to 118 Ma in the Early Cretaceous period. The ages of Qingshan Group volcanic rocks from Shandong Province controlled by Tan-Lu fault are similar to those from the Su-Wan segment of the Tan-Lu fault zone,but younger than those around the Tan-Lu fault zone,which indicates that the duration of volcanic eruption along Tan-Lu fault is probably longer than the duration in other areas under the background of lithospheric thinning in eastern China. Geochemically, all the intermediate and acidic volcanic rocks have high K2O, ALK, LREE values and low MgO, TiO2, Ni, Cr, HREE values. According to the geochemical features, the volcanic rocks can be subdivided into trachyte-trachydacite and rhyolite. The trachyte-trachydacite is characterized by LILE enrichment(Rb,Ba,K)and HFSE depletion(Nb,Ta,Ti,P), but the rhyolite exhibits stronger depletion of Ba,Sr and HFSE (Ti,P). Compared with the rhyolite,the trachyte-trachydacite possesses higher Sr and Ba values as well as La/Nb and Ba/Nb ratios,but lower Rb/Ba ratios and δEu values. All these data indicate that they might have been derived from different magma sources. It is inferred that the trachyte-trachydacite rocks were derived from the mixture of the partial melting of the lower crust(Yangtze Craton or North China Craton)and enriched lithospheric mantle. In addition, the rhyolites were related to the partial melting of the lower crust in the regional extension environment and high geothermal anomaly background with crystallization differentiation during the magma evolution.

    • 宝玉石矿物学
    • GUO Li-he, HAN Jing-yi, LUO Hong-yu

      2006,25(4):349-356, DOI:

      Abstract:

      At present, the infrared transmission spectroscopy is the best technique for determining whether jadeite is polymer-impregnated or not, and the infrared reflectance spectroscopy is a nondestructive and rapid determination method that provides mainly the fundamental frequency vibration spectra data of minerals and shows new application potentials in gemological research, especially in the identification of gem species. The gemological application of IR reflectance spectroscopy and the identification system of IR spectra of gems, including a database of 318 spectra and a searching and identifying program, are described in this paper.

    • 专题研究
    • LIN Guang-chun

      2013,32(4):485-495, DOI:

      Abstract:

      Petrology, geochemical and Nd isotopic data are reported for the Neoproterozoic Danba metabasalt in the Kangdian Rift on the western margin of the Yangtze block. Samples were collected from alkaline basalts, which are enriched in MgO, TiO2, with Mg# being 0.51~0.59. They have high total rare earth elements and show high fractionation between LREE and HREE. The trace elements are characterized obviously by enrichment of Th, Nb, Ta, Zr, Hf and LREE but depletion of Y and HREE. Their geochemical and Nd isotopic characteristics suggest that they are similar to OIB. The basaltic magma was generated in an intraplate setting, and was generated by partial melting of OIB mantle source region, with variable degrees of contamination of SCLM during magma ascending; in addition, some samples might have experienced contamination of the lower crust. These samples reveal some plume magmatism characteristics in petrochemistry, and imply that magmatism was probably related to the Neoproterozoic plume event, which resulted in the breakup of Rodinia supercontinent.

    • ZHANG Kan, ZHU Xiang-kun

      2013,32(4):529-537, DOI:

      Abstract:

      The newly-exposed lower strata of the Xiamaling Formation near Tielingzi Village in Jixian County contain rich siderites. This paper reports the basic geological characteristics of these siderite-rich strata in terms of the field outcrop, petrology and major elements. Studies show that the profile is characterized by black shale interbedded with silty iron-rich layers/siderite concrete layers, and also has minor siltstone. Some iron-rich strata have turned into limonite layers in the outcrop because of intense weathering. Siderite is the main iron mineral phase in the strata. Siderites can form iron concretes, showing micritic or microcrystalline granulitic textures under the microscope, or form silty ferruginous layers with almost a comparable amount of silty quartz; it can also distributed sporadically in siltstone and black shale with relatively coarse particles. There also exists very little siderite residue in weathered limonite layers. The overall features of major elements show that the strata are rich in SiO2, TFe and TOC, but poor in MnO, CaO, MgO, P2O5 and S. Except for ferriciron in weathered layers, there is mainly ferrous iron in the strata. The TOC content decreases in order of siderite concrete, silty iron-rich layer, black shale and siltstone. The correlation diagram between TFe and Al2O3 content shows a negative correlation in iron-rich layers, while a positive correlation between them exists in normal black shale and siltstone, which suggests that iron in the former form originated from the ocean itself, while iron in the latter form originated mainly from terrigenous detritus. In addition, FeO content has a positive correlation with TOC content in fresh samples, which implies that the genesis of siderites may have some relationship with organic matter.

    • Zhou Zheng

      1997,16(1):81-90, DOI:

      Abstract:

      From the discovery of the first new mineral hsianghualite in 1958 to the end of 1995,74 new minerals found in China had been approved by IMA CNMMN. Among them, 2/3 were discovered after 1981. The discovery of new minerals in China has the following features:(1) With the development of analytical methods, the number of new minerals discovered per year increases gradually: from the end of 1950s to 1960s, only one new mineral was discovered every year on the average, whereas from 1980s till now, three new minerals were discovered averagely every year. (2) The structures of many new minerals have been determined. (3) Most of the new minerals are in the lower category, mainly in the monoclinic system, and perfect crystals are rare; hsianghualite has the most abundant crystal faces, whose ideal faces can reach 146. (4) Among those new minerals, silicates take the first place in number, followed by native elements, alloys, and then oxides. (5) The modes of occurrence of new minerals are varied, most of them occurring in oxidized zones of various deposits and deposits related to ma fic or ultramafic rock masses. There are a few new minerals occurring in skarn and placer deposits or even in cosmic dusts and meteorite.(6) The new minerals are characterized by wide but uneven distribution. Till now, new minerals have been discovered in 20 provinces or autonomous regions, especially in Hebei, Qinghai, Inner Mongolia and Henan. The number of new minerals found in North China is larger than that found in South Chine. (7) The number of discoverers of new minerals is in tens. The first discoverer of new mineral is Prof. Huang Yunhui, whereas Prof. Yu Zuxiang is the one who discovered the most numerous new minerals in China, totally disclosing 11 new minerals by himself or together with other experts. Most of the discoverers are members of the Chinese Academy of Geological Sciences, China University of Geosciences, and Institute of Geochemistry, Academia Sinica as well as other educational and scientific research institutions. The discovery of new minerals has promoted the development of mineralogy in China. Tens of discoverers were awardees of the National Natural Sciences Prize or the Science and Technology Progress Prize of the Ministry of Geology and Mineral Resources for the discovery and research results of new minerals in 1980s. More than 60 new mineals discovered in China were collected by the Geological Museum of China, with some of them exhibited in the Minerals and Rocks Exhibiting Room.

    • 其他
    • LUO Yue-ping, DENG Wang-hui, DUAN Ti-yu, WANG Chun-sheng

      2011,30(Z1):181-186, DOI:

      Abstract:

      As more and more treated turquoises appear on Chinese gem market, the authors collected lots of turquoises from different deposits on Chinese gem market in order to sum up the characteristics of the natural turquoises on Chinese gem market. At the same time, different types of treated turquoises were studied to find general difference between them and natural turquoises. The results show that natural turquoise and treated turquoise have different shades of color, inclusions and appearances. IR spectra of both natural and treated turquoises were studied, indicating that there are absorption peaks at 1 735, 1 600 and 1?500 cm-1 in treated turquoises, which are caused by the man-made polymer. If the turquoise is treated by polymer, there are absorption peaks at 1 735, 1 600 and1 500 cm-1 in a turquoise, and this can serve as convincing evidence in this aspect.

    • 专题研究
    • ZHU Xin-you, WANG Yan-li, CHENG Xi-yin, TIAN Ye

      2016,35(1):16-32, DOI:

      Abstract:

      There are several types of xenoliths, such as monzonite, quartz diorite porphyry, black rock and greisen schlieren, in the alkali feldspar granite of the Yaogangxian tungsten deposit, Hunan Province. The xenoliths are different in geological and geochemical characteristics, sources and evolution paths, which implies the genesis and magma evolution history of the Yaogangxian granite. In this paper, the authors studied the petrology, geochemistry of the xenoliths, alkali feldspar granite, and monzonite batholiths formed in late Jurassic period. It is detected that the monzonite inclusion (Ⅰb) came from early crystallization of deep magma chamber similar to the monzonite batholith. The quartz diorite porphyry and black rock xenoliths seem to have been the residue of Precambrian metamorphic rocks in the melting. The greisen schlieren resulted from the transition from the alkali feldspar granite stage to the magma-hydrothermal stage. The fine biotite granite xenolith (Ⅲb) in the quartz porphyry was captured from the supplementary granite which was differentiated from the main magma, or from the granite pluton formed from the supplementary rocks. The granite (Ⅰ) was rich in volatiles, which resulted in strong contamination of the xenoliths, and a certain amount of fluorite, mica, tourmaline and sulfide minerals formed in the xenoliths. The Yaogangxian granite is a product of the intrusion of highly fractionated magma derived from the magma chamber equivalent to monzonite batholith. The quartz porphyry magma directly resulted from the residue of segregation from fractional crystallization of magma chamber, rather than from the alkali feldspar granite of Yaogangxian. It is suggested that the magma evolved in order of magma chamber (main) (coarse monzonite) → fine biotite granite (supplementary) → alkali feldspar granite → magma-hydrothermal transition fluid (tungsten mineralization) → quartz porphyry veins.

    • LI Yu-long, YANG Zhu-sen, TIAN Shi-hong, ZHAO Zhi-yi, LU Shi-yin, ZHANG Yao, LIU Ying-chao

      2015,34(5):648-664, DOI:

      Abstract:

      Two kinds of carbonate hosted Pb-Zn deposits, namely carbonate-rich Pb-Zn deposits and fluorite-rich Pb-Zn deposits, extensively exist in the same Pb-Zn metallogenic belt in the world according to the classification based on gangue mineral assemblages. The relationship between the two kinds of deposits remains unclear. In the middle part of the 'Sanjiang' metallogenic belt in the Tibetan Plateau, the Dongmozhazhua carbonate-rich Pb-Zn deposit and the Mohailaheng fluorite-rich Pb-Zn deposit occur in the same carbonate-hosted Pb-Zn ore concentration area. In the two deposits, the carbonate strata are host rocks, the thrust faults are the main ore-controlling structures, the main orebody attitudes are of stratabound type, and sphalerite and galena are the main ore minerals. However, calcite and dolomite are the main gangue minerals in the Dongmozhazhua deposit while calcite and fluorite are the main gangue minerals in the Mohailaheng deposit. The geochemical features of rare earth elements (REE) in calcium-bearing minerals are different in the two deposits. The REE values of calcite in the Dongmozhazhua deposit are mainly characterized by obvious fractionation of LREE and HREE, enrichment of LREE, negative Eu anomalies and 'V'_shaped curves of chondrite-normalized REE patterns with right deviation. In contrast, the REE values of calcite and fluorite in the Mohailaheng deposit are chiefly characterized by no obvious fractionation between LREE and HREE, negative Eu anomalies and 'M'_shaped curves of chondrite-normalized REE patterns with right deviation. The total concentrations of REE (∑REE) of calcite (0.46×10-6~10.79×10-6) in the Dongmozhazhua deposit are higher than those in the Mohailaheng deposit (0.25×10-6~5.88×10-6). The geochemistry of the REE indicates that calcium-bearing minerals in the two deposits were all precipitated from a kind of hydrothermal fluids which had nothing to do with igneous activities. The salinity and reducibility of the fluids decreased with the sulfide precipitation. The two kinds of deposits had similar hydrothermal fluids; nevertheless, there existed another kind of fluid for the Mohailaheng deposit, which was a kind of fluorine-rich fluid from deep metamorphic basement. This fluorine-rich fluid controlled the location of the fluorite-rich carbonate hosted Pb-Zn deposits and could be used to explain the phenomenon why this kind of Pb-Zn deposits were more easily precipitated near the main thrust faults and the lowest carbonate strata in the region. The result achieved by the authors could answer the question why the carbonate-rich Pb-Zn deposit and the fluorite-rich Pb-Zn deposit can occur in the same region and same time in the world.

    • ZHANG Wen, WU Tai_ran, HE Yuan_kai, FENG Ji_cheng, ZHENG Rong_guo

      2010,29(6):719-731, DOI:

      Abstract:

      Beishan area is located in the west of Inner Mongolia and Gansu Province, which is the conjunction zone of Tarim plate, Sino-Korea plate and Kazakhstan plate and plays an important role in the study of the Central Asia Orogenic Belt (CAOB). The relationship of the three plates is so complicated that there exists much controversy concerning Paleozoic tectonic evolution in this area. Granitoids, especially Late Paleozoic granitoids, are widely distributed in Beishan area, which are of great importance in the study of Paleozoic magmatic evolution. Through analyzing the spatial and temporal distribution of the Late Paleozoic granitoids, we can find the relationships between these granitoids and explore the crust-mantle interaction in Beishan area during Late Paleozoic, which is important for determining the geotectonic evolution of this area. In the southern belt of Beishan, the most important tectonic event in Permian is the formation of Yin'aoxia rift zone, which makes the study of Late Paleozoic evolution more complex. The results of studying Xijianquanzi granite lying in the southern belt of Beishan in such aspects as major elements, trace elements, REE and LA-ICP-MS zircon U-Pb geochronology have provided new evidence for regional tectonics. The LA-ICP-MS zircon U-Pb age of Xijianquanzi granite is 266.1±2.2 Ma, and the Hf modal ages are 746~871 Ma. εHf(t) values are +1.3~+4.7 with an averageof +2.7, which implies the mixture of crustal and mantle.derived magmas. This feature coincides with that of other areas in the Central Asia Orogenic Belt (CAOB). Therefore, the granites in the belt may have similar magma sources. The granitic body mainly consists of monzonitic granites which belong to alkaline series with high content of SiO2 (74.33%~76.67%), Na2O+K2O (9.26%~9.57%, NK/A=0.9~1.08) and K2O (Na2O/K2O<1) . In addition, chondrite-normalized REE patterns and primitive mantle normalized geochemical patterns of all samples are approximately parallel to each other, which shows that they evolved from the same magma source. Chondrite-normalized REE patterns of the intrusive body are of “V" types and show enrichment of light rare earth elements (LREE) with low ratio of (La/Yb) N (3.18~5.29) and negative Eu anomalies (δEu =0.10~0.16). Except for Eu, the abundance of rare earth elements are demonstrably over 10 times that of chondrite. Depletion of Nb, Ba, Sr, Ti, P and enrichment of Rb, Th, K can be seen in the spidergram. Based on regional geological and geochemical characteristics, the authors have reached the conclusion that the Xijianquanzi intrusive body is an alkali-rich potassium-high granite which is a mixed product of crustal and mantle-derived magmas and was formed at the stage of rifting in the post-collisional extensional period, affected greatly by Yin'aoxia rift zone. This implies that the area entered into the stage of rifting in Middle Permian.

    • 综合资料
    • ZHANG Xi-huan, REN Yu-feng

      2008,27(2):135-151, DOI:

      Abstract:

      本文以表格的形式列举了经国际矿物学协会(IMA)新矿物与矿物命名委员会(CNMMN)批准、并于2003年度正式发表的新矿物共55种,其中硅酸盐31种,磷酸盐5种,砷酸盐2种,硫酸盐4种,硫化物3种,碳酸盐2种,钒酸盐2种,硼酸盐1种,硒化物1种,硫盐1种,氧化物1种,氢氧化物1种,复杂卤化物1种.文中表格依次列出了矿物的中外文名称及化学式、晶系及晶胞参数、主要粉晶数据、物理性质、光学性质、产状及共生(伴生)组合等.

    • 中国大陆环境典型斑岩型矿床成矿规律和找矿模型:研究进展(Ⅱ)专辑
    • ZHOU Jin-sheng, JI Xian-hua, YANG Zhu-sen, HOU Zeng-qian, ZHUANG Liang-liang

      2015,34(4):557-567, DOI:

      Abstract:

      In the magma-related deposits, the ore-forming plutons generally experienced high-degree evolution and differentiation, so its petrologic and geochemical characteristics can only reflect the final state of magma evolution. The evolution of ore-hosted magma and the geochemical behavior of main metallogenic elements in the evolution remain unclear. However, the study of contemporaneous and sympatric magmatic rocks provides a potential solution for this question. Here the authors made a case study of the northern Gangdise Pb-Zn ore belt in Tibet formed in the early period of continental collision. Based on the statistical study of lots of published geochemical analyses of magmatic rocks from the Gangdise belt, this paper presents the evolution of magma and its control of metallogenesis. The results suggest that, besides the crystallization differentiation of magma itself, crustal contamination was another factor controlling the evolution from basic magma to acid magma during differentiation. It is also found that most of the magmatic rocks formed in the early period of continental collision are less oxidized and less hydrous; nevertheless, when magma evolved to the middle and late period, the oxidation of magma increased with progressive evolution. Mantle-derived magmas are enriched in S and H2O, which experienced underplating at the base of Zn-enriched crust materials and induced partial melting. Crust-derived magmas experienced high-degree evolution, and finally resulted in the formation of the northern Gangdise Pb-Zn ore belt.

    • 专题研究
    • SHI Jian-rong, LIU Fu-lai, LIU Ping-hua, MENG En, LIU Chao-hui, YANG Hong, WANG Fang, CAI Jia

      2014,33(1):29-50, DOI:

      Abstract:

      Eclogites and blueschists are exposed mainly as slices or variable tectonic lenses within garnet phengite schists in Habutengsu area, southwestern Tianshan Mountains, Xinjiang. In this paper, petrography, mineralogical chemistry and p-T conditions of the eclogites and blueschists were studied in detail. The eclogites could be divided into four groups, i.e., glaucophane eclogites, paragonite eclogites, epidote eclogites, and glaucophane-garnet amphibolites (retrograde eclogites), whereas blueschists could be divided into three groups, namely glaucophane-bearing garnet-muscovite-albite schists, garnet-muscovite-glaucophane schists and garnet-muscovite-glaucophane-quartz schists. Major mineral assemblages are Grt+Omp+Pg+Ep for the fresh eclogites, Grt+Gln+Amp for the retrograde eclogites, and Grt+Gln+Phe+Pg+Ab+Qtz for the blueschists. Porphyroblastic garnets show perfect prograde zoning, with XMn and XFe deceasing and XMg and XCa increasing from the core to the rim, which indicates a process of increasing temperature and prograde metamorphism. According to the paragenetic assemblages of inclusions within garnet as well as in matrix, four stages of metamorphism were recognized, viz., pre-peak lawsonite-blueschist facies metamorphic stage, peak eclogite facies stage (t=543~579℃, p=1.5~1.6 GPa), retrograde epidote-blueschist facies stage (t=~450℃, p<1.0 GPa), and post-peak retrograde blueschist-greenschist facies stage (t<400℃, p<0.5 GPa). The p-T pseudosection calculation shows that the peak metamorphic conditions were 520~550℃ and 1.7~1.9 GPa for the eclogites, and 520~620℃ and 1.7~2.3 GPa for the blueschists, similar to the results of traditional geothermobarometer. Previous researchers reported coesites preserved in some eclogites and country rocks, which suggested that partial eclogites and partial country rocks within the southwestern Tianshan metamorphic belt underwent UHP metamorphism, but this conclusion is inconsistent with the results constrained by the eclogites in this study. The possible reasons might be as follows: ① the eclogites were affected by later thermal events, which led to the partial variation of both minerals and whole rock compositions. On the basis of the changed whole-rock compositions, the traditional thermobarometer Grt-Cpx-Phe and phase equilibrium simulations certainly show relatively low pressure results, and ② not all eclogites from the southwestern Tianshan underwent UHP metamorphism, and HP-UHP eclogites may represent the metabasites subducted to different depths.

    • 综合资料
    • AI Yu-jie, FAN Guang

      2015,34(1):117-128, DOI:

      Abstract:

      This paper presents a collection of 31 new uranium minerals approved by the Commission on New Minerals, Nomenclature and Classification (CNMMN) of the International Mineralogical Association (IMA) between January 2003 and December 2013. It lists the mineral names both in English and Chinese together with their structural formulae, crystal structure data, physical and optical properties, localities and modes of occurrence. The crystallochemical classification and characteristics of these new minerals are discussed. Some suggestions are put forward concerning China's uranium minerals research work in the hope of providing valuable reference for China's uranium researchers.

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    Editor:Zengqian Hou

    Started in:1982

    ISSN 1000-6524

    CN 11-1966/P