云南兰坪—思茅盆地勐野井钾盐矿床盐构造特征及成因机制

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云南兰坪—思茅盆地南部勐野井钾盐矿床沉积了巨厚的钾石盐,岩盐层整体呈现盐构造特征,且发育较强,多期褶皱频出,与上覆碎屑岩之间呈不整合或假整合接触。在喜马拉雅运动造成的强烈挤压和差异负载作用及盆地升降过程中的重力滑移作用下,岩盐形成较为复杂的盐构造体系。研究表明勐野井钾盐矿床盐构造受多重作用影响,重力滑移作用是盐构造初始动力来源,之后在差异负载作用及浮力作用下,盐构造发育相对缓慢,强烈的区域挤压作用是盐构造快速发育的重要原因,并促进差异负载、重力滑移作用和浮力作用进一步发展,形成较为复杂的盐构造体系。盐构造的研究对于探寻钾盐矿体的成因、运动规律和成矿作用具有重要意义。 Large deposits of potash salt have been deposited in the Mengyejing potash deposit in the southern Lanping-Simao Basin, Yunnan. The whole rock salt has the characteristics of salt tectonics, strong development, frequent pleat folds, and no overlap with the overlying clastic rocks Integration or fake contact. Under the action of intense crushing and differential load caused by the Himalayan movement and gravitational slip during the basin uplift and fall, salt rocks form a relatively complicated salt structure system. The results show that the salt structure of Mengyejing potash salt deposit is affected by multiple actions. The gravitational slip is the source of initial salt structure. Under different load and buoyancy, the salt structure is relatively slow and the strong regional crustal pressure is salt structure Rapid development of important reasons and to promote the differential load, gravity slip and buoyancy further development, the formation of a more complex salt structure system. The study of salt structure is of great significance for exploring the genesis, movement rules and mineralization of the potash ore body.
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