FORMATION MECHANISM OF DEPRESSIONS AND RIFTS IN THE CENOZOIC BASIN OF NORTH JIANGSU PROVINCE
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摘要: 苏北新生代盆地是由众多的断陷和坳陷组合而成的,它们发育在中、古生界逆冲推覆体上,其结构、规模和区域分布受逆冲推覆体的控制。断陷的形成是区域拉张背景下逆冲推覆带后缘断片回滑的结果,构成逆冲推覆体的“后缘凹陷”。苏北盆地不仅存在不同时期纵向上的断坳转化,而且在同一时期横向上兼有断、坳并存。Abstract: The Cenozoic Basin in North Jiangsu province consists of numerous depressions and rifts which develop on the Meso-Paleozoic thrust nappe and whose structure,size and regional distribution are controlled by the thrust nappe.The formation of rifts is the result of faultshards on the backedge of the thrust nappe backgliding under the background of regional extension which forms the "backedge sags" of the thrust nappe.In the North Jiangsu Basin,not only longitudinal rift-depression transformation exists in different periods,but also rifts and depressions coexist laterally in the same period.
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Key words:
- rifts /
- depressions /
- formation mechanism /
- the North Jiangsu Basin
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[1] 王良书,施央申.油气盆地地热研究[M].江苏南京:南京大学出版社,1989.
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