贵州省织金矿区晚二叠世晚期潮坪相沉积特征

Later Late Permian Tidal Flat Facies Sedimentary Features in Zhijin Mining Area,Guizhou Province

以贵州省织金矿区四个含煤向斜构造单元勘查资料为基础,对该区晚二迭世晚期沉积特征进行分析,认为区内广泛发育砂泥潮坪相和碳酸盐潮坪相。由于海水影响程度的差异,二者在岩石类型、层理、生物化石、自生矿物、元素地球化学特征等方面特征明显,主要表现在前者更多地具有陆相沉积特征,后者则更多地体现海相沉积的特点。砂泥潮坪相之上常发育较好的可采煤层,煤层硫分也较低,而碳酸盐潮坪相则正好相反,因此在研究区找煤时,建议重点放在砂泥潮坪相发育的区域。

Based on exploration data of d coal-bearing synclinal structural elements in the Zhijin mining area, Guizhou Province, analyzed later Late Permian sedimentary features in the area, recognized sand and mud tidal flat facies and carbonate tidal flat facies are widely developed in the area. Owing to sea water impact extent difference, the two facies have their own rock type, bedding, fossils, and authigenic mineral, elemental geochemical characteristics, mainly found expression in： the former has more continental deposit features, where as the later more marine deposit features. Upon the sand and mud tidal facies, frequently developed better mineable coal seams with less sulfur content, while upon the carbonate tidal flat just on the contrary, thus coal looking in the area should put emphases on sand and mud tidal fiat developed areas.