| 甘肃玉门昌马地区蛇绿混杂岩地质特征 |
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| 引用本文： | 黄增保,许荣科,等.甘肃玉门昌马地区蛇绿混杂岩地质特征[J].甘肃地质学报,2001,10(2):12-22. |
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| 作者姓名： | 黄增保 许荣科 |
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| 作者单位： | 甘肃省地勘局第六勘查院 甘肃金昌737100
(黄增保，许荣科，张彦杰)，甘肃省地勘局第六勘查院 甘肃金昌737100(金霞) |
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| 摘 要： | 昌马地区蛇绿混杂岩位于玉门市昌马乡南锅底坑山一带 ,是北祁连山西段加里东期俯冲杂岩的重要组成部分。带内发育早寒武世裂谷火山—沉积岩系、中寒武世蛇绿岩、蓝片岩等。地球化学特征显示蛇绿岩形成于微洋盆环境 ;蓝片岩为微洋盆有限俯冲之产物。蛇绿混杂岩经历了 4次变形变质作用。
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| 关 键 词： | 蛇绿混杂岩 蓝片岩 构造演化 昌马地区 |
GEOLOGICAL CHARACTERISTICS OF OPHIOLITIC MIXTITE IN CHANGMA REGION YUMEN GANSU |
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| HUANG Zeng-bao,XU Rong-ke,ZHANG Yan-jie,JIN Xia.GEOLOGICAL CHARACTERISTICS OF OPHIOLITIC MIXTITE IN CHANGMA REGION YUMEN GANSU[J].Acta Geologica Gansu,2001,10(2):12-22. |
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| Authors: | HUANG Zeng-bao XU Rong-ke ZHANG Yan-jie JIN Xia |
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| Institution: | (No.6 Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Jinchang 737100,China) |
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| Abstract: | Ophiolitic mixtite in Changma region occurrence around Nanguodikengshan of Changma,Yumen,and it is an important part of western Qilian caledonian complex.In this belt,there are development lower Cambrian rift volcanic rocks-sedimentary rocks,mid-Cambrian ophiolite-blueschiste and so on.Its geochemical features shows that the ophiolite formed in micro-ocean basin environment and the blueschist is product of limited subduction micro-ocean basin.The ophiolite has undergone four metamophic processes. |
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| Keywords: | Ophiolitic mixtite Blueschist Tectonic evolution Changma region |
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