远东鄂霍茨克海域弧后盆地形成机制与构造演化

发布时间：2018-01-31 04:45

本文关键词： 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　出处：《海洋地质与第四纪地质》2016年04期 　论文类型：期刊论文

【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)。
[Abstract]:There are many Cenozoic back-arc basins developed in the Okhotsk sea area of the far East. These basins are an important part of the western Pacific marginal basin. The geological structure and structural characteristics of the Okhotsk sea area are introduced. The source of the dynamic mechanism of basin formation and the division of tectonic evolution stages in the sea area are discussed. It is considered that the collision between the Pacific plate and the Eurasian plate leads to the effects of the compressional and extensional processes on the time. The upwelling of deep asthenosphere leads to the development of back-arc rift basin in Okhotsk sea area. At the same time, the collision of the surrounding plates leads to the development of large-scale strike-slip faults and tectonic inversion, and the formation of the basin is reformed. The tectonic evolution of the basin can be divided into four stages: the basement assemblage stage (J-K 2 front) and the basement fold-extensional deformation stage (K 2-E1). The fault-depression stage E _ 1-N _ 1) and the tectonic inversion stage N _ 2-Quaternary.
【作者单位】：中国石油勘探开发研究院;中国石油拉美公司;
【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)
【分类号】：P736.1
【正文快照】： 鄂霍茨克海域位于俄罗斯远东地区,海域面积为158.3万km2,大部分区域被东北亚不同地形区所围绕,东以堪察加半岛和千岛群岛为界,南抵日本的北海道,属于西太平洋西北部的边缘海(图1)。西太平洋边缘海是大陆和大洋岩石圈过渡带上的特殊地质构造单元,蕴含着大陆边缘增生与裂解、洋

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