| 甘肃昌马地区寒武纪构造演化探讨 |
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| 引用本文： | 黄增保, 金霞. 甘肃昌马地区寒武纪构造演化探讨[J]. 西北地质, 2004, 37(1): 51-57. |
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| 作者姓名： | 黄增保 金霞 |
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| 作者单位： | 甘肃省地勘局第四地勘院, 甘肃 酒泉 735000 |
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| 基金项目： | 中国地质调查局区域地质调查项目(200213000020)《1∶25万红宝石幅》区调成果 |
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| 摘 要： | 位于北祁连山造山带西段的昌马地区,1:5万东湾、三道湾幅区调在中寒武世地层中发现Leiosphaeridia,Lophosphaeridium,Cymatiosphaera,Retisphaeridium,Synsphaeridium,Multiplicis-phaeridium,Retinarites等晚震旦世的藻类化石。据此,笔者将本区中寒武世地层解体为3部分:晚震旦世地层、早寒武世地层和中寒武世黑茨沟组。并对锅底坑蛇绿混杂岩带进行了确认,在此基础上对本区寒武纪构造演化模式作以探讨。
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| 关 键 词： | 构造演化 蛇绿混杂岩 昌马地区 地层划分 |
| 文章编号： | 1009-6248(2004)01-0051-07 |
| 收稿时间： | 2003-05-23 |
| 修稿时间： | 2003-05-23 |
Structural evolution of Cambrian tectonic belt in Changma area,Gansu |
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| HUANG Zen-bao, JIN Xia. Structural evolution of Cambrian tectonic belt in Changma area, Gansu[J]. Northwestern Geology, 2004, 37(1): 51-57. |
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| Authors: | HUANG Zen-bao JIN Xia |
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| Affiliation: | Fourth of Gansu Institute of Geology and Mineral Exploration, Jiuquan 735000, China |
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| Abstract: | In the west Qilian orogenic belt of Changma, Gansu,Late Sinian fossils,e.g: Leiosphaeridia,Lophosphaeridium,Cymatiosphaera,Retisphaeridium,Synsphaeridium,Multiplicisphaeridium,Retinarites et al. were discovered in Heicigou Formation of the Middle Cambrian through 1:50 000 geological mapping.Based on this reseach,the Middle Cambriam strata was divided three parts:Late Sinian strata,Early Cambriam strata,and Heicigou Formation of the Middle Cambriam and structural evolution model from the Late Sinian to the end of the Middle Cambrian was put forward. |
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| Keywords: | stractural evolution ophiolitic melange Changma area stratigraphic division |
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