摘要
琼东南盆地和珠三坳陷在新生代经历了张裂和裂后发育阶段，断裂活动具有分期性，与断裂活动伴生的构造在各期具有不同的应力学特征。该区在新生代构造应力场经历了三期演化：第I期，始新世－早渐新世SE－NW向拉张应力场；第Ⅱ期，晚渐新世一早中新世SN向拉张应力场叠架NE向右旋剪切应力作用；第Ⅲ期，中中新世NE向右旋剪切应力场。这三期构造应力场演化对琼东南盆地及珠三坳陷成为含油气盆地起着重要的作用。
Qiongdongnan basin and Zhu 3 depression experienced rifting and post rifting stages. The faulting activity was in stages and the structures associated with the faulting activities are with dif- ferent stress characteristics at various stages. The stress field in the study area experienced three evoluation stages during Cenozoic, i.e. the 1st stage of SE-NW pulling apart stress field during Eocene-early Miocene, the 2nd stage of right lateral shear stress field super imposed to SE tensile stress field during late Oligocene-early stage of early Miocene, and the 3rd stage of NE right later- al shear stress field during middle Miocene. The stress fields of The three stages played an impor- tant role in the hydrocarbon accumulation in Qiongdongnan basin and Zhu-3 depression.
出处
《中国海上油气（地质）》
1993年第6期26-32,共7页
China Offshore Oil and Gas(Geology)
