中国大陆科学深钻主孔中FeCrNi合金球粒的发现
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P575

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国家重点基础研究发展规划(973)项目(2003CB716503),国家自然科学基金重大项目(40399143)


The discovery of FeCrNi spherules from the main hole of CCSD
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    摘要:

    在中国大陆科学深钻主孔中发现了2粒FeCrNi合金球粒,粒径约200μm,其中w(Fe)=71.07%~73.68%,w(Cr)=14.55%~16.79%,w(Ni)=9.91%~11.47%,总和为98.2%~99.65%,分子式为Fe0.74Cr0.16Ni0.10。球粒内均含氧化物包体,由Cr、Mn、Al、Si、Fe、Ti和O组成。X射线衍射分析表明,FeCrNi球粒为多晶,具立方晶系的晶体结构,空间群为Fm3m,晶胞参数为a=0.3603nm,Z=4,密度为7.828g/cm3。球粒经抛光后呈银灰色,金属光泽,平均莫氏硬度为4.026,主波长S546反射率为56%。球粒可能是FeCrNi合金组成的金属熔融液滴冷却的产物。

    Abstract:

    Two FeCrNi spherules were discovered in the main hole of CCSD. They are about 200 μm in size. Their chemical compositions are Fe 71.07%~73.68%, Cr14.55%~16.79% and Ni 9.91%~11.47%,totally 98.2%~99.65%.The spherules contain oxide inclusions, with elements of Cr, Mn, Ti, Al, Fe, Si, and O. X-ray diffraction analysis shows that the spherules, having molecular formulaof Fe0.74Cr0.16Ni0.10,is polycrystalline and of the cubic system, with space group of Fm3m, cell parameter of a =0.360?3 nm, Z=4 and density of 7.828 g/cm3. The polished faces of the spherules are white gray in color and have metallic luster. The hardness of the spherules is about 4.026Hm. The reflectance of spherule is 56%~63%, with S546 of 56%. The spherules were probably produced by cooling of melted FeCrNi metallic droplets which trapped oxygen and was thus oxidized.

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任玉峰 方青松 白文吉 杨经绥 戎合 颜秉刚 张仲明 许志琴,2005,中国大陆科学深钻主孔中FeCrNi合金球粒的发现[J].岩石矿物学杂志,24(5):485~488. Ren YuFeng;Fang QingSong;Bai WenJi;Yang JingSui;Rong Ge;Yan BingGang;Zhang ZhongMing;Xu ZhiQin,2005,The discovery of FeCrNi spherules from the main hole of CCSD[J]. Acta Petrologica et Mineralogica,24(5):485~488.

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  • 收稿日期:2005-07-11
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