Structural Style and Tectonic Evolution of the Eastern Part of Jianghan Basin in the Jianghan Plain Region

详细信息   

• 责任者：She Xiaoyu (Key Laboratory of Exploration Technologies for Oil and Gas Resources ; Ministry of Education ; School of Geophysics and Oil Resources ; Yangtze University ; Jingzhou 434023 ; China) ; Ding Xiaohui
• 刊名：Geotectonica et Metallogenia
• 出版年：2012
• 卷期：36(2)
• 关键词：构造格架 ; tectonic framework ; 构造演化 ; structural evolution ; 江汉平原 ; Jianghan Plain
• 页码：p.209-216
• 图表：4 illus., 13 refs.
• 分类号：0300
• issnNo：ISSN1001-1552
• isbnNo：CN44-1595/P

摘要

This paper discusses the regional structural framework, local styles, and tectonic evolution of the east part of Jianghan Plain. The area was dominated by compressive tectonic structures in Mesozoic-Paleozoic, and structurally characterized by ramp interference, south-north zonation, and vertical overlap. Three major tectonic belts were recognized in the area ： Jiangnan-Xuefeng decollement nappe in the south ; ramp （back） tectonic belts in the central; Qinling-Dabie nappe structure in the north. The multi-stage tectonic deformation, displacement and magmatic activity led to the development of four types of basic structural styles： compressional tectonics, compressional strike slip tectonics, diaper and blind diaper tectonics, and extensional tectonics. It is generally believed that during the period of Sinian to Early and Middle Triassic, the studied area and Mid-Yangtze Region experienced two episodes of tectonic cycle ： convergency, accretion, displacement, subduction, intracontinental collisional orogenesis of the plates. And after that, they experienced foreland slope in Late Triassic, intra-continental orogeny and compressive fold in Late Jurassic, denudation planation and reformation of magmatic rocks in Late Jurassic to Early Cretaceous, negative structure inversion and fault depression in Middle and Late Cretaceous to Paleaogene, the another positive inversion of tectonic regime and regional compression uplift in Neogene. Multi-stage tectonic move- ment and multi-type superposition and modification of the prototype basin contribute to the complexity of structural framework of the east part of Jianghan Plain.