| 桐峪含金断裂特征分析 |
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| 引用本文： | 魏刚锋.桐峪含金断裂特征分析[J].地球科学与环境学报,1989(2). |
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| 作者姓名： | 魏刚锋 |
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| 作者单位： | 西安地质学院地质构造研究所 |
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| 摘 要： | 在桐峪地区的含金断裂带中,动力变质岩内大量出现的波状消光、变形纹、变形条带、扭折等现象有力地证明它们是韧性断层。韧性断层无论在时间上还是空间上都呈波浪状。波浪运动使金矿富集于其产状由陡变缓和平面的拐弯处。这类矿床可称之为动力变质热液矿床。
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| 关 键 词： | 桐峪 韧性断层 波浪运动 金矿 |
THE CHARACTERISTICS OF THE GOLD-BEARING FAULTS IN THE TONGYU DISTRICT |
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| Wei Gangfeng.THE CHARACTERISTICS OF THE GOLD-BEARING FAULTS IN THE TONGYU DISTRICT[J].Journal of Earth Sciences and Environment,1989(2). |
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| Authors: | Wei Gangfeng |
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| Institution: | Xi'an College of Geology |
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| Abstract: | On the basis of plenty of practical investigation in the field and of the study of microtectonics in the laboratory, the main achievements in this research can be summarized as follows.
1. a lot of undulatory extinction, deformation lamella, deformation bands, deformation twinning, kinkband and the mylonites can be found in rocks by the gold-bearing faults.So it is believed that they are the ductile faults.Mylonitiza-tion started from the ductile deformation to form the ductile faults in the Yen-shanian which then were transformed into the britle faults and complicated by the latsr movements. All of the ductile faults have been being wavy both in time from activities to the states of relative rest and in space.
2. The formation of the gold ore is closely related with the wavy movement of the crust, when the faults moved, the mylonites were formed, followed by a lot of the dynamo-hydrothermal metamorphic solutions.when the faults were relatively calm, the metamorphic solutions filled the open positions of the faults and were crystallized there. Both structural activites and metallogenetic processes took place many times. The wave movements of the ductile faults caused the gold depositrs to be enriched in the turning points of the faults.This kind of deposit can be named the dynamo-hydrothermal metamorphic deposit. |
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| Keywords: | Tongyu ductile fault crust-wave movement gold deposit |
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