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一、盆地含煤地质及地质勘探程度姚安盆地位于康滇地轴南部西侧,是燕山运动后期逐步形成的构造侵蚀型盆地,面积约38平方公里。在晚第三纪上新世晚期,盆地内接受了一套厚400余米的陆相含煤沉积。由于内陆沉积环境复杂,使含煤岩系的岩性、岩相在纵向和横向上的变化都较剧烈。含煤岩系上复一套厚70—90米的更新世冲积、洪积、湖积层,为全隐伏煤田。
I. Geological Prospecting of Basin Coal-bearing Geology and Geology The Yao’an Basin is located on the west side of the southern axis of the Kang-Dian axis. It is a tectonic-erosional basin gradually formed in the late Yanshan movement with an area of about 38 km 2. Late Late Pliocene Late Pleistocene, the basin received a set of 400 meters thick continental coal-bearing sediments. Due to the complicated inland sedimentary environment, the lithology and lithofacies of the coal-bearing rock series change more vertically and horizontally. Coal-bearing rocks on the set of a set of 70-90 m thick Pleistocene alluvial, alluvial, lake strata, for the whole hidden coal fields.