| 云开地区中生代成矿地质背景及成矿动力学机制研究 |
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| 引用本文： | 蔡明海,战明国,彭松柏,孟祥金,刘国庆.云开地区中生代成矿地质背景及成矿动力学机制研究[J].矿床地质,2002,21(3):264-269. |
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| 作者姓名： | 蔡明海 战明国 彭松柏 孟祥金 刘国庆 |
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| 作者单位： | 宜昌地质矿产研究所,湖北,宜昌,443003 |
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| 基金项目： | 本文为原地质矿产部"九五"重点科技攻关项目(95-02-007)和中国地质调查局2000年大调查项目(19991020085003)部分成果. |
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| 摘 要： | 文章通过对云开地区地质构造，矿床时空分布以及中生代花岗岩类岩石的岩石学及地球化学特征的综合研究，认为区内中生代岩石圈构造经历了二叠－三叠纪之间的碰撞挤压，侏罗纪的构造转换及白垩纪的拉张伸展3个阶段的演化过程，大规模成矿作用受控于燕山早期岩石圈的构造转换及燕山晚期的拉张伸展的岩石圈动力学背景。
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| 关 键 词： | 中生代 云开地区 构造转换 成矿作用 动力系统转换 时空分布 花岗岩 |
| 文章编号： | 0258-7106(2002)03-0264-06 |
Study of Mesozoic Metallogenic Geological Setting and Dynamic Mechanism in Yunkai Area |
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| Cai Minghai,Zhan Mingguo,Peng Songbai,Meng Xiangjin and Liu Guoqing.Study of Mesozoic Metallogenic Geological Setting and Dynamic Mechanism in Yunkai Area[J].Mineral Deposits,2002,21(3):264-269. |
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| Authors: | Cai Minghai Zhan Mingguo Peng Songbai Meng Xiangjin and Liu Guoqing |
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| Abstract: | An integrated study of geological structural characteristics, granite petrology and time_space distribution regularity of deposits indicates that the Mesozoic lithosphere of Yunkai area experienced three tectonic evolution phases: the collision between 201 and 277 Ma, the tectonic transformation from compression to extension between 154 and 160 Ma, and the extension between 80 and 100 Ma. The ore_forming processes were concentrated in mid_Jurassic and Cretaceous, controlled successively by the tectonical transformation of lithosphere in early Yanshanian and the further spreading and extension of late Yanshanian. The tectonic transformation of the lithosphere was related to its own increasing heat flow value. The extending and thinning of the lithosphere is the basic factor responsible for the Mesozoic massive ore_forming processes in this area. The distribution and location of the deposits were controlled by the transformation of local dynamic system, and the formation of the deposits resulted from the transformation of different dynamic systems. |
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| Keywords: | Yunkai area tectonic transformation ore_forming process dynamic system transformation |
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