摘要
During the Late Carboniferous Taiyuan and Shanxi stage, some relevant factors in the formation and distribution of the high-seam zone in Shanxi can be summed up as follows: 1. The Type of Lithofacies Association The sandstone-mudstone facies and the mudstone-sandstone facies are the best lithofacies association types in the high-seam zone formation, in which the clastic ratio is>8 and the sandmud ratio 1/2—2 (excluding the seam). 2. The Type of Phase-Cycle
