远东鄂霍茨克海域弧后盆地形成机制与构造演化  

FORMATION MECHANISM AND TECTONIC EVOLUTION OF BACK-ARC BASINS IN THE OKHOTSK SEA

作　　者：贺正军 温志新 王兆明 阳孝法 刘小兵 郭纯恩 

机构地区：[1]中国石油勘探开发研究,北京100083 [2]中国石油拉美公司,北京100007

出　　处：《海洋地质与第四纪地质》2016年第4期93-102,共10页Marine Geology & Quaternary Geology

基　　金：国家油气重大专项(2011ZX05028);中国石油天然气股份公司重大科技专项(2013E-0501)

摘　　要：远东鄂霍茨克海域发育多个新生代弧后盆地,这些盆地是西太平洋边缘海盆的重要组成部分,介绍了鄂霍茨克海域的地质结构和构造特征,探讨了海域内盆地形成的动力机制来源及构造演化阶段的划分。认为太平洋板块与欧亚板块碰撞引发区域上挤压与引张作用在时间上相互消长的效应、深部软流圈上涌,共同引发鄂霍茨克海域内多期次弧后扩张作用,导致海域内弧后裂谷盆地的发育;同时,周边板块碰撞导致大型走滑断裂发育和构造反转,对盆地的形成进行改造;共同控制了弧后沉积盆地的形成与演化。盆地构造演化可以划分为4个阶段,即基底拼合阶段(J-K2前)、基底褶皱-张裂变形阶段(K2-E1早期)、盆地裂陷-拗陷作用阶段(E1-N1)及构造反转阶段(N2-第四纪)。There is a number of Cenozoic back-arc basins occurred in the Okhotsk Sea as the important components of marginal basins of the western Pacific Ocean.In this paper,the tectonic architectures and the characteristics of the Okhotsk Sea are described and investigated in terms of the dynamic mechanism of basin formation and tectonic evolution.The collision of the Pacific plate and the Eurasian plate triggered the shifting of the regional pattern of compression and extension and the upwelling of the asthenosphere in deep,and brought about the multi-stage back-arc spreading of the Okhotsk Sea and the formation of the back-arc rift basins.The collision of the surrounding plates induced giant strike-slip faults,structural inversions and the reform of basins.All the factors mentioned above control the formation and evolution of the back-arc basins.The tectonic evolution of the basins can be then divided into four stages,i.e.basement amalgamation,basement folding and extensional deformation,basin rifting and depression,and tectonic inversion.

关 键 词：弧后盆地 弧后扩张 板块俯冲 构造反转 俄罗斯远东 鄂霍茨克海域 

分 类 号：P541[天文地球—构造地质学]