| 柴达木盆地北缘麻粒岩的发现及地质特征 |
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| 引用本文： | 王毅智,梁超云,王桂秀.柴达木盆地北缘麻粒岩的发现及地质特征[J].青海国土经略,2000(1). |
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| 作者姓名： | 王毅智 梁超云 王桂秀 |
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| 作者单位： | 青海省地质调查院，青海省地质调查院，青海省地矿科技信息中心 西宁 810012，西宁 810012，西宁 810001 |
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| 摘 要： | 在柴达木盆地北缘东段,首次从古元古代达肯大坂岩群中发现太古宙麻粒岩,并取得3450Ma Sm-Nd等时线同位素年龄。该麻粒岩以包体产出于元古代变质侵入体中,原岩为拉斑玄武质岩石,其形成于大洋岛弧构造环境,经高温高压麻粒岩相变质作用形成。
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| 关 键 词： | 太古宙麻粒岩 柴达木盆地北缘 首次发现 地质特征 |
DISCOVERY OF GRANULITE IN THE NORTH MARGIN OF QAIDAM BASIN AND ITS GEOLOGICAL CHARACTERISTICS |
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| Authors: | Wang Yizhi Liang Chaoyun Wang Guixiu Qinghai Institute of Geological Survey Xining Qinghai Scientific and Technical Information Center of Geology and Mineral Resources Xining |
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| Institution: | Wang Yizhi,Liang Chaoyun,Wang Guixiu Qinghai Institute of Geological Survey Xining 810012 Qinghai Scientific and Technical Information Center of Geology and Mineral Resources,Xining 810010 |
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| Abstract: | A Archaeozoic granulite with an isotope age(Sm-Nd isochoron) of 3450 Ma,was found firstly in Proterozoic Dakendaban Group in eastern north margin of Qaidam Basin.The granulite was occurred as an inclusion in the Proterozoic metamorphic intrusive body.Its protolith is tholeiitic rocks. Its was formed by high temperature and pressure metamor-phism in tectonic environment of granulite facies. |
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| Keywords: | Archaeozoic granulite north margin of Qaidam Basin Discovery firstly geological characteristics |
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