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北苏鲁超高压变质岩锆石中的矿物包体 被引量:5

Mineral Inclusions in Zircons from UHP Metamorphic Rocks, Northeastern Sulu Terrane, China
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摘要 北苏鲁莒南—岚山头—日照—桃行—仰口—荣成—威海一带榴辉岩的围岩经历了强烈角闪岩相退变质作用的改造,峰期超高压矿物组合已完全被后期退变矿物组合所取代。锆石微区阴极发光图像和矿物包体激光拉曼测试研究结果表明,132件不同类型岩石(包括榴辉岩、斜长角闪岩、正片麻岩、副片麻岩、大理岩、蓝晶石英岩、云母片岩和钙镁硅酸盐类变质岩等)锆石中,普遍隐藏以柯石英为代表的超高压矿物包体。此外,在南苏鲁东海及其邻区的地表露头和一系列钻孔岩心的锆石中,也普遍发现以柯石英为代表的超高压矿物包体。该项研究成果表明,在苏鲁地体由榴辉岩及其围岩的原岩所组成的陆壳岩石(约320km×20km×5km)曾发生过巨量物质深俯冲—超高压变质的壮观地质事件。 The metamorphic rocks distributed on the northeastern Sulu UHP terrane, consist mainly of eclogite, amphibolite, orthogneiss and paragneiss, with thin layers and blocks of marble, mica-bearing schist and camgit metamorphic rocks. All analyzed (except eclogite) samples are overprinted by amphibolite-facies retrogression. However, coesite-bearing UHP minerals as inclusions in zircons from 132 outcrop samples have been identified using laser Raman spectroscopy and cathodoluminescence (CL) image analysis. Simil...
出处 《地质学报》 EI CAS CSCD 北大核心 2006年第12期1817-1830,共14页 Acta Geologica Sinica
基金 国家重点基础研究发展规划"973"项目(编号2003CB716502) 国家自然科学基金重大项目(编号40399143) 国土资源大调查地质调查项目(编号121201056606)联合资助成果。
关键词 锆石 矿物包体 激光拉曼 阴极发光 超高压岩石 北苏鲁 zircon mineral inclusion laser Raman cathodoluminescence image ultrahigh-pressure metamorphic rocks northeastern Sulu
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参考文献32

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