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| 西藏松多榴辉岩矿物出溶体研究 | |
| 引用本文： | 郭倩,赵文霞,陈建林,王保弟.西藏松多榴辉岩矿物出溶体研究[J].岩石学报,2012,28(5):1689-1696. |
| 作者姓名： | 郭倩 赵文霞 陈建林 王保弟 |
| 作者单位： | 1. 中山大学测试中心,广州510275;东省物料实验检测中心,广州510080 2. 中山大学测试中心,广州,510275 3. 中国科学院广州地球化学研究所,同位素地球化学国家重点实验室,广州510640 |
| 基金项目： | 本文受国家重点基础研究发展规划973项目(2009CB421004)、中国科学院创新项目(KZCX2-YW-Q04)和国家自然科学基金(40772046)联合资助. |
| 摘 要： | 西藏松多榴辉岩中的石榴石和单斜辉石中发育有大量的矿物出溶体。电子探针能谱分析结果表明,石榴石中的出溶体为金红石,绿辉石中的出溶体为石英和富钾质矿物(钾长石)。根据石榴石-绿辉石-多硅白云母矿物温压计计算出的松多榴辉岩变质温压范围接近石英-柯石英相转变线,结合这些出溶体的存在,指示了西藏松多榴辉岩曾经历过超高压变质作用,这为松多榴辉岩的形成条件提供了重要证据。 |
| 关 键 词： | 榴辉岩 矿物学 出溶体 松多 西藏 |
| 收稿时间： | 2012/1/10 0:00:00 |
| 修稿时间： | 4/8/2012 12:00:00 AM |
Study of mineral exsolution on the Songduo eclogites in Tibet |
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| GUO Qian,ZHAO WenXi,CHEN JianLin and WANG BaoDi.Study of mineral exsolution on the Songduo eclogites in Tibet[J].Acta Petrologica Sinica,2012,28(5):1689-1696. | |
| Authors: | GUO Qian ZHAO WenXi CHEN JianLin and WANG BaoDi |
| Institution: | Instrumental Analysis and Research Center, Sun Yat-sen University, Guangzhou 510275, China;Guangdong Province Material Testing Center, Guangzhou 510080, China;Instrumental Analysis and Research Center, Sun Yat-sen University, Guangzhou 510275, China;State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China |
| Abstract: | A lot exsolution structures have been observed in the Songduo eclogites, southern Tibet. EDS analyzing in the EPMA shows that the exsolutions in garnet are rutile, and the exsolutions in omphacite are a K-rich mineral and quartz. The calculation of the garnet-omphacite-phengite geobarothermometer shows that the peak-metamorphic P-T conditions of the Songduo eclogites are close to the transformation line between quartz-coesite. Thus, the exsolutions of minerals indicate that the Songduo eclogites likely experienced UHP metamorphism, which provides an important evidence for formation P-T conditions of the Songduo eclogites. |
| Keywords: | Eclogite Mineralogy Exsolution Songduo area Tibet |
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