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华北晚石炭世的(虫筳),自下而上分为(1)Mvntiparus—Triticites,(2)Pseudoschwagerina —Rugosofusulina,(3)Sphaeroschwagerina,(4)Robustoschwagerina 等四个顶峰带。太原西山及其以北地区缺少(3)、(4)两个顶峰带的沉积;淮南、淮北及豫西又缺少(1)、(2)两个顶峰带的沉积。华北的北部和南部海水进退互为消长,海水早期由西北和东北进入,向南及东南退去,这些都显示出华北的海水进退是一个新模式。海岸线自北向南迁移,牵动了与之有关的沉积矿产——铝、煤、铁等的富集中心随之有规律的南移。
The Late Carboniferous in North China is divided into four top-notch zones: (1) Mvntiparus-Triticites, (2) Pseudoschwagerina-Rugosofusulina, (3) Sphaeroschwagerina and (4) Robustoschwagerina. There is a lack of deposition of the two summit zones in (3) and (4) in the western part of Taiyuan and in the area to the north of it. There is a lack of deposition of the two summit zones (1 and 2) in Huainan, Huaibei and western Henan. The seawater in northern and southern North China dwindle each other, and the seawater enters early in the northwest and northeast and recedes to the south and southeast. All this shows that seawater in North China is a new mode of advance and retreat. The migration of the coastline from north to south affected the sedimentary mineral resources associated with it - the enrichment centers of aluminum, coal and iron would follow the regular southward move.