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郯庐断裂带两侧分布着一系列中、新生代含油气盆地,如松辽盆地、渤海湾盆地和苏北—南黄海盆地等。这些盆地的构造、沉积和岩浆活动等特征记录了中、新生代郯庐断裂的演化过程;而中、新生代郯庐断裂活动则控制了两例盆地的形成。 根据盆地构造型式及其与部庐断裂之间的时空关系、构造、岩浆活动和沉积建造等特征分析可知:①在印支至早燕山运动期间,由于太平洋板块向北西俯冲在滨太平洋地区产生了南北向直扭应力场的作用,郯庐断裂连为一体并发生左行压扭活动;②从侏罗纪开始至白垩纪,太平洋板块的俯冲作用变为间歇式,郯庐断裂转变为左行压扭与拉张裂陷交替作用的时期;③新生代期间,由于太平洋板块的俯冲方向转变为SW方向,郯庐断裂主要表现为右行压扭和拉张裂陷的交替运动。同时,郯庐断裂被北西向断裂分段解体。不同地段的活动方式和方向有显著差异。大致以沈阳为界,北段主要表现为小幅度的伸展作用;南段则主要表现为右行压扭和拉张裂陷交替作用。
A series of Meso-Cenozoic petroliferous basins are distributed on both sides of Tan-Lu fault zone, such as the Songliao Basin, Bohai Bay Basin and the Subei-Southern Yellow Sea Basin. The characteristics of tectonic, sedimentary and magmatic activities of these basins record the evolution of the Meso-Cenozoic Tan-Lu fault; while the Meso-Cenozoic Tan-Lu fault activity controlled the formation of two basins. According to the tectonic type of the basin and its spatial-temporal relationship with the Lu-Lu fault, tectonism, magmatic activities and sedimentary structures, we can see that: ① During the Indosinian-Early Yanshanian movement, due to the northwestern subduction of the Pacific plate in the Pacific Ocean From the Jurassic to the Cretaceous, the subduction of the Pacific plate became intermittent, and the Tan-Lu fault changed to the left During the Cenozoic, due to the subduction direction of the Pacific plate turns to SW direction, the Tanlu fault mainly alternates with right-lateral compressive and tensile rifting. In the meantime, the Tan-Lu fault was disintegrated by the NW-trending fault. There are significant differences in the ways and directions of activities in different locations. It is generally bounded by Shenyang, with the northern part mainly exhibiting minor extensional effect and the southern part mainly with alternately acting right twisting and tension-ripping.