| 康定杂岩的时代及成因探讨 |
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| 引用本文： | 朱宗祥,江淑芳.康定杂岩的时代及成因探讨[J].地球科学与环境学报,1988(4). |
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| 作者姓名： | 朱宗祥 江淑芳 |
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| 作者单位： | 四川省地质矿产局攀西地质大队
(朱宗祥)，四川省地质矿产局攀西地质大队(江淑芳) |
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| 摘 要： | 四川西南部前震旦纪康定杂岩,主要由英云闪长质深成岩和一些具残留顶盖特征的变质地层组成。深成岩体呈南北向线性展布,实地接触关系证明,它们是晚于围岩的侵入体;而且岩相学和地球化学特征表明,深成岩是玄武质源的岩浆分离结晶作用产物.结合区内岩石构造组合,可以推断英云闪长质深成岩是在位于陆缘型岩浆弧近大洋的构造环境下形成.鉴于康定杂岩的岩石组合及地球化学特征与太古代地体存在明显差别,其时代应属于元古代.
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| 关 键 词： | 康定杂岩 残留顶盖 地球化学 地体 |
AN INQUIRY OF THE TIME AND GENESIS OF KANGDING ROCK COMPLEX |
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| Zu Zongxiang Jiang Shufang.AN INQUIRY OF THE TIME AND GENESIS OF KANGDING ROCK COMPLEX[J].Journal of Earth Sciences and Environment,1988(4). |
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| Authors: | Zu Zongxiang Jiang Shufang |
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| Institution: | The Panxi Geological Team of the Bureau of Geology and Mineral Resources of Sichuan Province |
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| Abstract: | The Presinian Kangding rock complex in the southwestern Sichuan is composed Predominantly of the tonalitic-plutonic rocks and the metamorphic strata which are of the properties of the roof remnants.
The tonalitic plutonic rocks occur along a north-southern linean zone.The field Surveying proves that it is an intrusive body being later than its wallrocks.Its pet-
rogphic and geochemical characteristics indicate that it was formed by the fractional crystallization of the magma coming from the basaltic sourse.
According to the regional petrotectonic assemblage it can be inferred that the tectonic environment of the tonalitic plutonic rocks were possibly formed by the side of the continental margin-type magma-arc near the oceans.
Seeing that the characteristics of rock association and geochemistry of the kangding rock complex are distinct from those the Archean terrain, the writers tead to consider the era of the kangding rock complex to be the Proterozoic. |
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| Keywords: | Kangding rock comPlex roof remnants geochemistry terrain |
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