| 甘肃肃南白泉门地区蛇绿混杂岩地质特征 |
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| 引用本文： | 孙晓猛,张旗.甘肃肃南白泉门地区蛇绿混杂岩地质特征[J].地球科学进展,1997,12(4):340-350. |
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| 作者姓名： | 孙晓猛 张旗 |
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| 作者单位： | [1]长春科技大学工程技术学院 [2]中国科学院地质研究所 |
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| 摘 要： | 通过对甘肃肃南白泉门地区不同的构造岩块中的玄武岩，洼泥岩有砂岩的岩石学，地球化学及构造特征的综合研究，认为它们分别形式于洋脊，洋岛，岛弧，板内及活动大陆边缘等多种环境，各种环境的块体相线混杂并与蛇绿岩的基性一超基性岩岩块混杂产出，形成蛇绿混杂岩，该蛇绿混杂岩是北祁连中段加里东俯冲杂岩体的重要组成部分。
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| 关 键 词： | 蛇绿混杂岩 玄武岩 杂岩 地质特征 形成环境 |
THE GEOLOGICAL AND GEOCHEMICAL FEATURES OF THE OPHIOLITIC MELANGE IN BAIQUANMEN AREA FROM SUNAN COUNTY, GANSU PROVINCE |
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| SUN Xiaomeng.THE GEOLOGICAL AND GEOCHEMICAL FEATURES OF THE OPHIOLITIC MELANGE IN BAIQUANMEN AREA FROM SUNAN COUNTY, GANSU PROVINCE[J].Advance in Earth Sciences,1997,12(4):340-350. |
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| Authors: | SUN Xiaomeng |
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| Institution: | Eingeering and Technology College,Changchun Science and Technology University,Changchun 130022；Institute of Geology,Chinese Academy of Sciences,Beijing 100029 |
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| Abstract: | The authors have made the comprehensive study on the petrology, lithogeochemistry and tectonic feature of basalts, silicalites, mudstones and sandstones in different tectonic block of Bai quanmen area of Sunan county, Gansu province and thought that they form separately in the environment of ocean ridge, oceanic island, continetal island arc, continental margin and intraplate. The blocks in the various environments mixed together and mixed and accumulated with a lot of ultrabasic rock blocks and formed the ophiolitic melange, which is the important unit of subduction complex body of the Northern Qilian Caledonides. |
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| Keywords: | Gansu Baiquanmen area Ophiolitic melange Basalt Chert Sandstone Foming settings |
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