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安徽淮南地区上元古界至下古生界海相建造赋存有大量的风暴沉积,分布层位为: 青白口系刘老碑组,下震旦统寿县组、九里桥组,下寒武统馒头组的中上部;主要产于海侵体系域和高水位体系域中。经研究,本区风暴岩包括原地、近源和远源三种风暴岩类型,可识别出十种剖面结构。主要依据风暴岩的底面构造形态、流水构造及剖面层序特征,着重探讨了各种剖面结构类型的产出环境、水动力条件及其沉积模式,认为由潮坪向陆棚,风暴流具有由风暴潮流( 旋涡流) →风暴回流( 碎屑流与摆动浪兼具) →风暴浊流发展的规律。图4 参7( 邹冬平摘)
There are a large number of storm deposits in the marine facies from the Proterozoic to the Lower Paleozoic in Huainan area, Anhui Province. The distribution layers are Liu Laobei Formation of Qingbaikou Estuary, Shouxian Formation of Lower Sinian, Jiuliqiao Formation, The upper part of the Wutong bread group is mainly produced in transgressive system tract and high water system tract. After research, the storm rocks in this area include three types of storm rocks, in-situ, near-source and far-source, and ten kinds of cross-section structures can be identified. Based mainly on the bottom surface structure, flowing water structure and sequence characteristics of the stratovolites, the authors focused on the output environment, hydrodynamic conditions and depositional patterns of various cross-sectional structure types. Storm surge (whirlpool) → storm backflow (both debris flow and swinging waves) → the development of storm turbidity flow. Figure 4 Reference 7 (Zou Dongping pick)