桐乡──平湖拗陷大地电磁研究  

MT RESEARCH ON THE TONGXIANG AND PINGHU SAGS

作　　者：石应骏[1] 寸树苍[1] 陈华玢 申时新[1] 

机构地区：[1]成都理工学院信息工程与地球物理系

出　　处：《成都理工学院学报》1996年第2期109-112,共4页Journal of Chengdu University of Technology

摘　　要：对桐乡──平湖拗陷大地电磁的研究表明：（１）控制桐乡凹陷和平湖凹陷的南北边界断裂，是火山岩沉积区内的中生代断裂，元古代深断裂实际上是统一的火山岩沉积拗陷的边界断裂。（２）桐乡凹陷和平湖凹陷的基底原来是一个统一的背斜构造，现今所指的平湖凹陷仅相当于桐乡凹陷基底背斜的南翼。推论在其北侧应存在一个对称的沉积凹陷。（３）盖层中的上白垩统兰溪组是一个低阻层，推论该层含有较丰富的泥岩层，可能是有利的生油层。The MT researchon the Tong-clang-Pinghu sag indicates that: (1)The northern and southern boundary faults controlling the Tongxiang and Pinghu sags are Mesozoic faults in a volcsnic sedimentary zone. The Proterozoic deep faults are virtually the boundary faults of a unified volcanic sedimentary sags. (2)The basement of the Tongxiang and Pinghu sags was a unified anticline. The Pinghu sag rsfrred here is only the southern wing of the Tongxiang basement anticline in the Tongxiang sag. It is deduced that there may be a symmetrical sedimentary sag on itsnotherm side. (3)The Upper Cretaceous Nanxi Group in the capping bed is a low-resistance formation. It is inferred that there is abundant mudstone in it. It may be beneficial oil-generating strata.

关 键 词：大地电磁测深 构造格局 桐乡凹陷 生油层 

分 类 号：P542.3[天文地球—构造地质学] P631.325[天文地球—地质学]