银川盆地构造反转及其演化与叠合关系分析  

The Study of Tectonic Inversion,Evolution,and Superposition of Yinchuan Basin

作　　者：侯旭波[1] 尹克敏[1] 林中凯[1] 韩秀艳[1] 陈伟[2] 

机构地区：[1]中国石化胜利油田分公司西部新区研究中心,东营257100 [2]中国石化江苏油田分公司地质科学研究院,扬州225009

出　　处：《高校地质学报》2014年第2期277-285,共9页Geological Journal of China Universities

基　　金：中石化胜利油田重点科技攻关项目(YKK1009)资助

摘　　要：以银川盆地构造反转为研究对象,从构造反转证据、反转时期以及反转强度等方面进行了分析,以此为基础,探讨了银川盆地中生代以来构造演化。研究表明:负反转构造的发育、新生界与中-古生界地层展布特征的差异性以及伸展构造样式与挤压构造样式并存等方面证明银川盆地发生负反转;构造反转的挤压隆升时期为晚侏罗世,伸展沉降期为渐新世至新近纪;银川盆地北部构造反转强度大于南部,西部反转强度大东部;银川盆地自中生代以来经历了三叠纪至早-中侏罗世时期的整体沉降、晚侏罗世的挤压隆升与差异剥蚀、早白垩世的再次沉降、白垩纪末期至新生代早期的整体隆升剥蚀、渐新世至新近纪的快速断陷以及第四纪的整体拗陷六个演化叠合阶段。The tectonic inversion of Yinchuan Basin was studied from inversion evidence, inversion period, and inversion intensity. In addition, the evolution and superposition of Yinchan Basin were discussed. The results show that the tectonic inversion of Yinchuan Basin was confirmed by development of negative inversion structures, the difference in distribution characteristics of the Cenozoic and Mesozoic-Palaeozoic formation, existing of extension and extrusion structural style. The extrusion and uplifting period of tectonic inversion is Late Jurassic, and the extension and subsidence period is from Oligocene to Neogene. The inversion intensity is stronger in the northern and western regions of the basin than in the southern and eastern regions. Yinchuan Basin has experienced six stages of evolution and superposition since Mesozoic, including integral subsidence from Triassic to Early-Mid Jurassic, extrusion uplifting and uneven denudation in Late Jurassic, again subsidence in early Cretaceous, integral uplifting denudation from Late Cretaceous to Early Cenozoic, rapid faulting related depression from Oligocene to Neogene, and integral depression in Quaternary.

关 键 词：银川盆地 盆地演化 负反转构造 构造样式 反转强度 

分 类 号：P542.2[天文地球—构造地质学]