Deformation Bands in the Cretaceous Yuanan Basin, Western Hubei, Central China

详细信息   

• 责任者：Qiao Yanbo (Guangzhou Institute Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Shan Yehua
• 刊名：Chinese Journal of Geology
• 出版年：2011
• 卷期：46(1)
• 关键词：断层 ; faults ; 破裂 ; rupture ; 湖北 ; Hubei Province
• 页码：p.181-193
• 图表：6 illus., 2 tables, 30 refs.
• 分类号：0300
• 出版序号：20120044
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

摘要

A variety of deformation bands and faults exist in the Cretaceous Yuanan Basin in the west of Hubei Province, China. Based upon conjugate deformation bands and fault-slip data measured in the field, palaeostress analysis was performed. The results indicate the existence of tension in the earlier stage, and of compression in the later stage. The earlier extension, directed from NWW to SEE, was consistent with the regional extensional regime in the Cretaceous. The later compression directed from N to S has nothing to do with the Late-Paleogene inversion of the Jianghan Basin, of which the Yuanan Basin was once a part on the northwest, by the compression perpendicular to it. It might have been resulted from the tectonogeny having a roughly similar direction at the end of the Paleogene.