摘要
本文从10~#煤层沉积前后岩相古地理和沼泽的发育及性质,探讨了该煤层的形成条件,论述了该煤层形成的历史背景及特定沉积环境,提出了由于成煤期地壳的不均衡沉降和沼泽基底不平引起煤层分布和厚度的急剧变化。其特厚煤点是在奥灰岩溶洼地形成,而无煤区是在成煤后受冲蚀形成,且有一定规律可寻,并受古地理所控制。
This paper inquires about the formation conditions of 10~# coal seam in chenghe mining area from lithofacies-paleogeography of pre- and post-sedimentation and the development arid nature of swamp, expounds the historical background and specific sedimentary enviroment of the coal seam formation and presents that the rapid change in coal seam distribution and thickness is resulted from uneven sedimentation and roughness of swamp base. The extreme thick coal points were formed in the karst, depression of Ordovician limestone, and the coalless area was formed after formation of coal due to scouring and etching, existing Certain rule to follow and controlled by paleogeography.
出处
《西安矿业学院学报》
北大核心
1990年第3期30-36,共7页
Journal of Xi'an University of Science & Technology
关键词
矿区
煤层
形成
地层
地质
lithofacies-paleogeography, swamp, karst depression
