东海陆架盆地中生界构造样式及其动力学成因探讨
发布时间：2019-07-25 17:10
【摘要】：构造样式为盆内各类构造组合的几何形态表达,反映了盆地所处应力场性质变化与构造演化过程。本文基于近5年来针对东海陆架盆地所取得的地震资料解释成果,并综合盆地构造演化特征及其地球动力学背景,对盆地内中生界构造样式进行了系统的分类与总结,详细划分为5类构造样式:伸展构造样式、挤压构造样式、走滑构造样式、反转构造样式和底辟构造样式,并进一步细化为12种构造组合。同时,对东海陆架盆地内西部坳陷、中部低隆起、东部坳陷3个构造单元内的中生界构造样式发育情况分别进行了总结,各类构造样式自西至东具有各异的展布特征。综合盆内中生界构造样式几何学特点与展布特征可见,由于伊佐奈歧板块的俯冲、碰撞作用,区内处于挤压构造环境,进而形成了挤压背斜、断背斜、正反转等构造组合;大洋板块的后退翻卷及板块碰撞、俯冲的远程效应下,区内构造环境以伸展作用为主,形成了一系列NNE向裂陷盆地,发育了丰富的伸展构造组合;走滑-拉分构造的发育较好体现了构造环境的转变,地震剖面上见有花状断裂发育;岩浆底辟构造多发育于拉张环境下,与断裂展布息息相关,多沿NE-NNE向断裂展布。此外,新生代多期构造运动是影响中生界构造样式发育展布的重要因素。
[Abstract]:The structural style is the geometric expression of various structural combinations in the basin, which reflects the change of the stress field in the basin and the evolution of the tectonic evolution. Based on the seismic data interpretation results of the continental shelf basin in the East China Sea in the last five years, and the characteristics of the tectonic evolution and the geodynamic background of the basin, the structure style of the basin is classified and summarized in detail. The extension structure style, the extrusion structure style, the walk-slip structure style, the inverted configuration style, and the diapir structure style are further refined into 12 construction combinations. At the same time, the development of the Mesozoic tectonic style in the western depression, the middle-low uplift and the eastern depression in the East China Sea shelf basin are summarized, and various structural styles have different distribution characteristics from the west to the east. in that comprehensive basin, the structural style and the distribution feature of the structure of the oceanic plate are visible, and due to the subduction and the collision effect of the Izoandisambiguation plate, the region is in an extrusion structure environment, so that the structural combination of the extrusion anticline, the fault anticline, the positive inversion and the like is formed, and the backward turning of the oceanic plate and the plate collision are formed, Under the remote effect of subduction, the tectonic environment in the region is dominated by the extension, and a series of NNE-to-rift basins are formed, and the rich extension structure combination is developed; the development of the slip-and-pull structure is better than that of the structural environment, and a flower-like fracture development is seen in the seismic section; The diapir structure of the magma is more developed in the tension environment, which is closely related to the distribution of the fracture, and is distributed along the NE-NNE to the fracture. In addition, the Cenozoic multi-period tectonic movement is an important factor in the development and distribution of the Mesozoic tectonic style.
【作者单位】： 中国地质调查局青岛海洋地质研究所;国土资源部海洋油气资源与环境地质重点实验室;
【基金】：国家自然科学基金(41506080;41606050) 中国地质调查局项目(DD20160153-01;DD20160155-02)
【分类号】：P736.1
本文编号：2519229
[Abstract]:The structural style is the geometric expression of various structural combinations in the basin, which reflects the change of the stress field in the basin and the evolution of the tectonic evolution. Based on the seismic data interpretation results of the continental shelf basin in the East China Sea in the last five years, and the characteristics of the tectonic evolution and the geodynamic background of the basin, the structure style of the basin is classified and summarized in detail. The extension structure style, the extrusion structure style, the walk-slip structure style, the inverted configuration style, and the diapir structure style are further refined into 12 construction combinations. At the same time, the development of the Mesozoic tectonic style in the western depression, the middle-low uplift and the eastern depression in the East China Sea shelf basin are summarized, and various structural styles have different distribution characteristics from the west to the east. in that comprehensive basin, the structural style and the distribution feature of the structure of the oceanic plate are visible, and due to the subduction and the collision effect of the Izoandisambiguation plate, the region is in an extrusion structure environment, so that the structural combination of the extrusion anticline, the fault anticline, the positive inversion and the like is formed, and the backward turning of the oceanic plate and the plate collision are formed, Under the remote effect of subduction, the tectonic environment in the region is dominated by the extension, and a series of NNE-to-rift basins are formed, and the rich extension structure combination is developed; the development of the slip-and-pull structure is better than that of the structural environment, and a flower-like fracture development is seen in the seismic section; The diapir structure of the magma is more developed in the tension environment, which is closely related to the distribution of the fracture, and is distributed along the NE-NNE to the fracture. In addition, the Cenozoic multi-period tectonic movement is an important factor in the development and distribution of the Mesozoic tectonic style.
【作者单位】： 中国地质调查局青岛海洋地质研究所;国土资源部海洋油气资源与环境地质重点实验室;
【基金】：国家自然科学基金(41506080;41606050) 中国地质调查局项目(DD20160153-01;DD20160155-02)
【分类号】：P736.1
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