合肥盆地逆掩冲断带地质-地球物理综合解释及其大地构造属性

在大量地震剖面综合解释的基础上 ,提出华北板块与北淮阳晚加里东 -早海西期褶皱带的界线应在六安断裂 ,肥中断裂是华北陆壳型基底与其过渡壳型基底的大致分界。首次发现合肥盆地侏罗系之下存在以青白口系刘老碑组泥质岩为主滑脱层的印支期形成的由南向北滑脱冲断、主要卷入华北地台及其被动陆缘上元古 -古生界的完整冲断体系 ,并认为侏罗纪盆地为再生前陆盆地 ,编制了前侏罗系基岩地质图 ,为研究华北、大别及扬子三大块体的相互关系提供了新资料

COMPREHENSIVE EXPLANATION OF GEOLOGY AND GEOPHYSICS OF OVERTHRUST BELT IN HEFEI BASIN AND INITIAL STUDY OF ITS TECTONIC ATTRIBUTE

Basedon the comprehensive explanation of a large number of seismic sections, this papersuggests that the boundary between the Northern China Plate and the Beihuaiyang FoldedBelt from Late Caledonian to Early Hercynian should be the Liuan Fault, and the FeizhongFault is about the line dividing continental crust basement and transitional crustbasement of the Northern China Plate. It is first discovered that Under Jurassic System inHefei Basin, a comprehensive overthrust system which has been mainly involved withNeoproterozoic and Paleozoic strata of craton and passive continental margin of theNorthern China Plate, and which formed in Indosinian Period （Middle to Late Triassic） overthrusting from south to north and sliding along thechief decollement layer of argillaceous rocks of Liulaobei Formation of Qingbaikou System.The basin in Jurassic is a rejuvenated foreland basin. A geologic map of Pre-Jurassic ofHefei Basin was drawn. It provides some information for dealing with the relationshipamong the Northern China Plate, Dabie Massif and Southern China Plate.