云南白秧坪矿化集中区成矿构造动力学分析

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云南白秧坪矿化集中区位于兰坪 思茅印支燕山、喜马拉雅期成矿带的北段 ,成矿以中生代海相过渡到陆相的碳酸岩建造、碎屑岩建造夹火山岩建造为基础 ,喜马拉雅期构造推覆及热液改造为主导作用。通过野外地质调查 ,利用共轭剪切破裂解析出断块掀斜前后的构造动力学特征。结果表明 ,本区喜马拉雅期构造运动有 3期 ,早期表现为云龙 江城褶皱系边部发生较强烈褶皱变形 ,盆地内部以挠曲变形为主 ;中期为脆性变形期 ,整个褶皱系出现SN向冲断层系统 ,前期褶皱部分得以强化 ,其余地区广泛出现宽缓褶皱 ;晚期为松驰 挤压交替的调整期。 The Baiyangping mineralization area in Yunnan is located in the Yanshan, Indosinian, Indosinian and northern part of the Himalayan metallogenic belt. The mineralization was based on the carbonatite transition from the Mesozoic marine facies to the continental facies, and the clastic rock was constructed with volcanic rocks. Himalayan tectonic overthrown and hydrothermal transformation as the leading role. Through the field geological survey, the tectonic dynamics before and after the block tilting are analyzed by means of conjugate shear failure. The results show that there are three tectonic movements in the Himalayan period in this area, which are characterized by strong fold deformation in the edge of the fold system of the Yunlongjiang city in the early stage and mainly flexural deformation in the interior of the basin. In the middle period, brittle deformation occurs, In the fault system, the pre-folded part was strengthened and the rest of the area was wide-wrinkled. In late stage, the relaxation period was replaced by slack-squeeze.
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