Mineral inclusions in rutile of Sulu UHP eciogites from the main drill hole of CCSD, Donghai
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P588.3 P57

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    Abstract:

    Rutile is a common Ti_bearing accessory mineral in eclogites. In the 100~2000 m borehole samples of the Chinese Continental Scientific Drilling Project, rutile appears in different amounts in rutile eclogite, phengite eclogite and kyanite eclogite. It, together with other minerals, can be wrappedin major metamorphic minerals such as garnets and omphacites, or can wrap otherminerals. Inclusions in rutiles from CCSD UHP eclogites were studied by electron microprobe. The result shows that the inclusions such as omphacites, Hf-rich zircons, high-Al sphenes, pargasites, katophorites and clinozoisites were formed during the progradation of eclogite-facies to peak metamorphism. With the exhumation of the Sulu UHP metamorphic belt, the eclogites underwent extensive retrograde metamorphism, and lots of minerals such as rutiles and omphacites experienced retrograde metamorphism too. Ilmenites coexisting with rutiles were subjected to different extents of retrometamorphism, yielding Fe-rutile and ulvospinel. Therefore, some retrograde mineral assemblages such as symplectites of diopside + plagioclase, low-Al sphene, magnesiotaramite were found in retrograded rutile.

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王硕 王汝成 邱检生 倪培 余金杰,2006,CCSD主孔超高压榴辉岩金红石中的矿物包裹体研究[J].岩石矿物学杂志,25(1):61~70. WANG Shuo, WANG Ru-cheng, QIU Jian-sheng, NI Pei, YU Jin-jie,2006,Mineral inclusions in rutile of Sulu UHP eciogites from the main drill hole of CCSD, Donghai[J]. Acta Petrologica et Mineralogica,25(1):61~70.

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  • Received:June 13,2005
  • Revised:June 13,2005
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