【摘要】 二连盆地上古生界经历海西、印支、燕山等多期构造改造,现今残存泥盆系、石炭系、二叠系等,其分布主要受区域深部大断裂的控制。针对上古生界重新处理地震资料,提高深层信噪比,增强深层反射能量,地震反射特征较为清晰;对重力资料联片处理,整体研究区域地质特征,采用小子域滤波和图像增强处理,准确确定深大断裂的位置。综合地球物理资料、地质调查资料,认为二连盆地发育近东西向、北东向5条深大断裂,发育规模大、活动时间长,对二连盆地不同时期大地构造演化、沉积建造、岩浆活动、变质作用等起明显的控制作用。地震资料显示,上古生界在二连盆地发育较普遍,经长期褶皱隆起剥蚀,总体表现为西部剥蚀较严重,东部残留厚度较大;泥盆系主要分布于贺根山断裂北部,南部缺失;石炭系、二叠系在盆地内分布广泛,东部和北部厚度大,其它地区局部残留,厚度差异较大,最大厚度近万米。更多还原

【Abstract】 The Neopaleozonic of Erlian basin is rebuilt by polyphase tectonic movements,such as Hercynian,Indo-Chinese epoch,Yanshanian.It remains many series of strata(Devonian,Carboniferous,Permian etc) now,which distributions are controlled by regional deep structures.Aiming at rehandling the seismic data of Neopaleozonic,we can improve the deep S/N ratio,enhance deep energy reflection,so that the seismic reflection features are more clearly.We can determine the location of deep structures accurately through carry on the gravity data overlapping process,research regional geological characteristics integrally,use small subfield filtering methods and image enhancement technology.Integrated geophysical data and the geological survey data,we think the Erlian basin grow five deep structures of EW-NE,which have controlled clearly the geostructure evolution,the sedimentary formation,the magmatic activity,the metamorphism function,because they have a wide-scale growth and move for a long time.It’s displayed by seismic data that the Neopaleozonic of Erlian basin grows generally through long-term drape uplift and erosion,there is a more serious erosion at west,a considerable remnants thickness at east in all.The Devonian distributes primarily at north of Hegen mountain structures while missed at south,Carboniferous and Permian distribute widely throughout the basin,which have a large thickness at east and north,and in other zones,they have a thickness diversity of local residue which the maximum closes to 10000 meters.更多还原