东海瓯江凹陷早第三纪裂谷期盆地充填机制探讨  

Discussion of Basin-fill Mechanism during Eogene Rifting Phase in Oujiang Trough, the East China Sea

作　　者：陈琳琳 

机构地区：[1]上海海洋石油局规划设计研究院

出　　处：《上海地质》1998年第4期38-47,共10页

摘　　要：早第三纪东海巨江凹陷曾是一个弧后拉张形成的裂谷盆地,拉张断裂在构造上控制了盆地地堑、半地堑地貌,从裂谷早期、中期到晚期,地层垂向演化表现出砂-泥-砂三重序列的充填型式,根据位于不同构造单元的SM—1、WZ6—1—1井为例证,从相对海平面、可容空间、物源供给诸方面探讨了地层成因机制。Oujiang Trough in the East China Sea was an rift basin resulted from back -arc extension. Extensional faulting exerted the structural control on the morphology of graben and half-graben. Rift vertical succession are characterized by a sandstone-mudstone - sandstone sediment-infill motif from rift early stage,climax stage to late stage. Taking two wells (SM-1,WZ6-1-1) which are located at different structure units as examples, this paper discusses the genetic mechanism from relative sea level, accommodation ,and sediment supply.

关 键 词：东海 瓯江凹陷 充填机制 早第三纪 裂谷盆地 拉张断裂 

分 类 号：P544.4[天文地球—构造地质学]