扬子地块西南缘区域成矿的大地构造背景和矿床形成的构造控制

来源 :矿物学报 | 被引量 : 0次 | 上传用户:march2th
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扬子地块西南缘正处在欧亚板块,印度板块和太平洋板块等三大板块的复合部位,其大地构造经历了前震旦纪、震旦纪至三叠纪和侏罗纪至第四纪等三大演化阶段。其发展演化导致该区沉积岩和岩浆岩中含有多种丰度较高的成矿元素,并在构造发展演化过程中,促使成矿元素活化、迁移、多次叠加富集,形成具有工业价值的金、银、铜、铅锌、汞锑等贵金属和有色金属的低温矿床成矿域。它们在时间上和空间上均呈现有规律的分布,并明显受地层、岩性、岩相和构造控制。特别是受构造控制更加明显,具多级构造控矿的特点,通常一级构造控制矿带;二级构造控制矿田、矿床;三级构造控制矿体的形态和产状。 The southwestern margin of the Yangtze block is located in the Eurasian plate, the Indian plate and the Pacific plate composite parts of the three plates, the earth structure experienced the Pre Sinian, Sinian to Triassic and Jurassic to Quaternary, etc. Three stages of evolution. The development and evolution of sedimentary rocks and magmatic rocks in the area lead to a variety of ore-bearing elements with higher abundance. During the tectonic evolution and evolution, the ore-forming elements are activated, migrated and superimposed and enriched several times to form industrial values Gold, silver, copper, lead and zinc, mercury and antimony and other precious metals and non-ferrous metal deposits of low-temperature deposits. They are regularly distributed both temporally and spatially and are obviously controlled by the formation, lithology, facies and tectonics. Especially controlled by the structure more obvious, with multi-level structure of ore-controlling characteristics, usually a control structure of ore belt; two structure control ore field, ore deposit; three structure control ore body morphology and occurrence.
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