| 华东南中新生代伸展构造时空演化与铀矿化时空分在 |
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| 引用本文： | 陈跃辉,陈祖伊,蔡煜琦,施祖海,封全宏,付锦.华东南中新生代伸展构造时空演化与铀矿化时空分在[J].铀矿地质,1997(3). |
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| 作者姓名： | 陈跃辉 陈祖伊 蔡煜琦 施祖海 封全宏 付锦 |
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| 作者单位： | 北京核工业地质总局，北京核工业北京地质研究院 |
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| 摘 要： | 本文运用大陆伸展构造理论，论述了华东南地区中新生代以来伸展构造的分布规律，分析了不同类型伸展构造的时空演化特点。在此基础上，应用华东南地区不同类型铀矿床已有的成矿年龄资料，研究了伸展构造活动与区域铀成矿作用之间的联系，不同类型伸展构造与不同类型铀矿床之间在空间分布和时间演化上的对应关系。认为伸展构造活动产生的有利构造环境是导致铀成矿作用产生的根本原因，伸展构造活动的脉动性及其相应的岩浆作用决定了铀成矿作用的多期多阶段性，不同地区伸展构造活动的先后决定了不同类型铀矿床成矿作用的时序和空间分布。文章最后认为，由于伸展构造活动对区域铀矿化的这种明显控制关系，本区不同类型铀矿化成矿机理具有统一性。
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| 关 键 词： | 华东南，伸展构造，铀矿床，时空演化 |
SPACE-TIME EVOLUTION OF MESO-CENOZOIC EXTENSIONAL TECTONICS AND DISTRIBUTIONS OF URANIUM MINERALIZATIONS IN SOUTHEASTERN CHINA |
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| Chen Yuehui, Chen Zuyi, Cai Yuqi, Feng Quanhong.SPACE-TIME EVOLUTION OF MESO-CENOZOIC EXTENSIONAL TECTONICS AND DISTRIBUTIONS OF URANIUM MINERALIZATIONS IN SOUTHEASTERN CHINA[J].Uranium Geology,1997(3). |
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| Authors: | Chen Yuehui Chen Zuyi Cai Yuqi Feng Quanhong |
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| Abstract: | With the theory of continental extensional tectonis,this paper discusses the distribution regularities of Meso-Cenozoic extensional tectonics of different types in southeastern China and theirspace-time evolution. Then according to the known isotope age data of uranium mineralizations inthe area, the relationship between the process of extensional tectonics and regional uranium metallogenesis,as well as the corresponding relations in space and time between extensional tectonicsand uranium deposits of different types are analyzed. Based on the analysis above,the authors believe that the favourable tectonic environment created by the extensional tectonics is the fundamental reason that results in uranium metallogenesis. The pulse activities of the extensional tectonics and its subsequent magmatism determine the multi-stage processes of uranium mineralizations. And the successive development of the extensional tectonics in different areas decides thetemporal sequence and spatial distribution of uranium deposits of different types. In conclusion,the authors suggest that the uranium mineralizations of different types in southeastern China arecharacterized by an united ore-forming mechanism due to the apparent control of extensional tectonics to the regional uranium metallogenesis. |
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| Keywords: | Southeast of China Extensional tectonics Uranium deposit Space-time evolution |
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