摘要
河南宜洛煤田晚石炭世太原组中的异地煤，不存在通常在煤层中见到的那种条带状－透镜状结构，而呈现出是一种粉粒状的、具有浊积层序特征的煤层．这种异地煤的底板，不是根土岩，而是含有腕足类动物化石和痕迹化石、具有海相成因的中－粗粒石英砂岩．根据煤层及其上覆、下伏岩层的沉积特征，以及与同层位的原地生成煤在空间上的展布规律，可以证明，异地煤是由于风暴回流将大量的泥炭物质携带到平均低潮面以下较深部位沉积下来的．在这种特定条件下形成的异地煤，其性质不仅仍属于煤的范畴，而且在厚度上有时也是可采的．
Late Carboniferous allochthonous coal is characterized by silty grains and shows similar turbidity sequence, without strike_lenticular structure commonly shown in in_situ coal. The bottom strata of allochthonous coal, not including root earth, comprise coarse_grained quartz sandstones with Brachiopoda fossils and trace fossils, indicating marine environments. According to the depositional characters of coal seams, underlying and overlying rocks, and the relationship of the spatial distribution of contemporaneous in_situ coal seam, allochthonous coal is found to be deposited when a large number of Carboniferous materials were transported to the areas below the medium tidal level or more by storm events. The allochthonous coal formed in this situation belongs to coal, and is minable sometimes for its thickness.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1998年第6期589-594,共6页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金
关键词
晚石炭世
异地煤
风暴作用
煤田
地层
煤系
Late Carboniferous, allochthonous coal, storm event, Yiluo coalfield.
