论湘中晚二叠世含煤建造南北相区的差异及其成因

通过对湘中牛马司、保和堂、洪山殿、笠山和桥头河等矿区晚二叠世龙潭组含煤建造的研究,建立了南部三角洲沉积相区和北部湖-潮坪沉积相区,详尽的论述了两相区的差异。指明了同沉积构造是控制两个相区的重要因素,同沉积构造与聚煤作用的关系。沉积相区的建立有重要的理论意义和现实意义。在湘中涟邵煤田龙潭组含煤建造中同沉积构造普遍存在,而且具有控煤作用。

ON THE DIFFERENCES BETWEEN SOUTH-AND NORTHFACIES REGIONS OF UPPER PERMIAN COAL-BEARING STRATA IN CENTRAL HUNAN AND THE MECHANISM OF THEIR FORMATION

Based on a detailed study on coal-bearing formations of Longtan Group inNiumasi, Baohetang, Hongshandian, Dolishan and Qiaotohe coal field, Central Hunan, two sedimentary factes regions have been identified: delta factes in the southfacies region and lagoon-tidal factes in north-factes region. The differences betweenthese two factes regions are discussed in detail. It is pointed out that synsedimentaryfault is an important factor controlling these two factes regions, and there is a correlation between the synsedimentary tectonics and the process of coal accumulation.The identification of sedimentary factes regions has important theoretical and practical significance. The synsedimentary tectonics seems to exist widespreadly in Upper Permian Longtan coal-bearing formations of Lianshao coal field, Central Hunanbeing an important coal-controlling factor.