| 剪切蚀变与物质迁移及金的富集——以胶东矿集区为例 |
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| 引用本文： | 邓军,方云.剪切蚀变与物质迁移及金的富集——以胶东矿集区为例[J].地球科学,2000,25(4):428-432. |
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| 作者姓名： | 邓军 方云 |
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| 作者单位： | 1.中国地质大学地球科学与资源学院, 北京 100083 |
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| 基金项目： | 国土资源部“百名跨世纪科技人才培养计划”基金!(No .980 8)，国家重点基础研究发展规划项目!(No .G19990 43 2 0 6)，国家攀登计 |
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| 摘 要： | 运用定量计算和计算机模拟与传统地质学相结合的方法, 研究胶东矿集区中剪切构造变形和围岩蚀变与物质迁移及金矿富集的相互关系.结果表明, 在剪切-蚀变作用过程中, 各种物质组分发生了不同程度的迁移, 存在较大的流体/岩石比值, 体积应变为增加型.成矿作用发生的最主要原因是剪切挤压-拉张构造作用引起的成矿元素活化→运移→富集.成矿早期, 形成以包体金为主的贫矿石; 成矿晚期, 形成含裂隙金和多金属细脉的富矿石.
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| 关 键 词： | 剪切-蚀变 物质迁移 成矿作用 |
| 文章编号： | 1000-2383(2000)04-0428-05 |
| 收稿时间： | 2000-03-26 |
SHEAR ALTERATION, MASS TRANSFER AND GOLD MINERALIZATION:AN EXAMPLE FROM JIAODONG GOLD-DEPOSIT CONCENTRATION REGION, SHANDONG, CHINA |
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| Deng Jun,Fang Yun,Yang Liqiang,Ding Shijiang,Xiao Rongge,Peng Runmin,Wang Jianping.SHEAR ALTERATION, MASS TRANSFER AND GOLD MINERALIZATION:AN EXAMPLE FROM JIAODONG GOLD-DEPOSIT CONCENTRATION REGION, SHANDONG, CHINA[J].Earth Science-Journal of China University of Geosciences,2000,25(4):428-432. |
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| Authors: | Deng Jun Fang Yun Yang Liqiang Ding Shijiang Xiao Rongge Peng Runmin Wang Jianping |
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| Institution: | Deng Jun
(Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China)Fang Yun
(Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)Yang Liqiang
(Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China)Ding Shijiang
,Xiao Rongge
,Peng Runmin
(Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China) |
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| Abstract: | In a metallogenic system, tectonism and fluid process occurred at the same time and therefore, they are coupled with each other. The action of ore forming fluids is bound up with formation and evolution of ore controlling structures. Structural fluid temporal spatial evolution track is, in essence, the mobilization, migration, aggregation and location process of ore forming materials, i.e. the coupled process of structural fluid mineralization. In this paper, the geological analysis for the gold deposit concentration region of Jiaodong, Shandong Province, China, is conducted with the Gresens' equation, Grant's isocon diagram and O'hara microelement calculation method, to reveal the interactions among the shear tectonic deformation, the wall rock alteration, mass transfer and gold mineralization. The research results show that the shear deformation and hydrothermal alteration not only include the deformational condition, feature and mechanism of the shear zone, but also are related to the formation, component, flow or circulation model and flux of the fluids in the zone, resulting in the reallocation of elements and the migration of the chemical materials. During the shear alteration process in the Jiaodong gold concentration area, all kinds of components were transferred in different amounts, the fluid rock ratio was relatively high and the volume strain was of dilation type. The major reason for this mineralization is the mobilization, migration and enrichment of ore forming elements induced by the shear compressive extensional tectonism. The low grade ores dominated by the inclusion gold were formed in the early ore forming stage, while the high grade ores containing fissure gold and polymetallic veinlets were formed in the late ore forming stage. |
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| Keywords: | shear alteration mass transfer ore forming process |
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