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地质通报  2002 

滇西昌宁―孟连带的地层格架

, PP. 315-321

Keywords: 滇西,昌宁―孟连带,地层

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Abstract:

显生宙地层在昌宁―孟连带呈南北向条带状分布,根据不同岩性的横向分布和纵向变化情况,可将带中的地层序列大致划分成4种类型:(1)碎屑岩向上夹灰岩透镜体,并变成细粒碎屑岩和硅质岩交互出现;(2)碎屑岩向上夹灰岩透镜体、少量硅质岩,顶部为二叠纪基性火山岩;(3)碎屑岩―基性火山岩/火山碎屑岩―碳酸盐岩―碎屑岩;(4)灰岩、白云质灰岩―灰黑色薄层灰岩、泥质灰岩、泥岩夹硅质泥岩。理清不同岩石地层单位间的关系是客观解释昌宁―孟连带发展演化的前提。

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