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华北陆台晚石炭世之■带与海水进退规程

THE FUSULIND ACME-ZONE AND THE CANON OF LATE CARBONOFEROUS MARINE TRANSGRESSION IN NORTH CHINA
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摘要 华北晚石炭世的,自下而上分为(1)Montiparus—Triticites,(2)Pseudoschuagerina-Rugosofusulina.(3)Sphacroschwayerina,(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。 Fusulinids are distributed in North China from Tangshan Hebei on the north Huainan on the south.The upper Carboniferous Fusulinebearing deposits can be subdivided into four Acme-zones. In ascending order they are: (1)The Montiparus-Triticites Acme-zone has been found in lowest upper Carboniferous in Baode,Taiyuan Lincheng etc. (2)The Pseudoschwagerina-Rugosofusulina Acme-zone is widespread in Hebei,Shandong and Shanxi of northern North China. (3)The Sphaeroschwagerina Acme-zone is well developed in the Yuxian,Huaibei Linyi and Xuzhou. (4)The Roustoschwagerina Acme-zone dominates the upper part of the upper Carboniferous sedi- ments,overlying upon the Sphaeroschwagerina Acme-zone. The late Carboniferous marine water invaded a vast area in North China.These transgression- regression units are well dated by detailed Fusulinids Acme-zones.In the early stage of the Carbonif- erous only the northern part of North China was inundated by sea water,and during the late stage of late Carboniferous the invasion of sea water reached to southern North China with a resulting re- treat in northern North China.The sea inundated this area from all directions,and later retreated to the south accompanied by a southward shift of the shorelines.
出处 《地质力学学报》 CSCD 1989年第2期87-97,共11页 Journal of Geomechanics
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