The formation and evolution of the East China Sea Shelf Basin: A new view
The formation and evolution of the East China Sea Shelf Basin: A new view
复制标题
东海陆架盆地的形成与演化：新观点
DOI：
10.1016/j.earscirev.2018.12.009
复制
发表时间：
2019-03
影响因子：
12.1
通讯作者：
Gao Shunli
中科院分区：
文献类型：
--
作者：
Zhu Weilin;Zhong Kai;Fu Xiaowei;Chen Chunfeng;Zhang Minqiang;Gao Shunli
弧后盆地和相关的俯冲系统已经得到了广泛的研究，但弧后盆地表现出幕式跳跃的伸展中心的俯冲不同的海洋板块是鲜为人知的。东海陆架盆地由两条向东延伸的近平行坳陷带组成，其形成演化伴随着复杂的俯冲历史，区域构造事件为揭示弧后盆地的各种地质特征提供了极好的机会。在此，我们回顾了东天山及其邻区各次盆地的构造和沉积特征，并重建了沉积古地理的演化。晚白垩世东陆缘伊那木板块俯冲过程中，东陆缘西坳陷带经历了裂谷作用。北方WDZ，长江坳陷以河流-湖泊沉积为主。在古新世末期，该凹陷经历了以褶皱和侵蚀为特征的强烈挤压作用。随后又发生了一次挤压事件，导致长江坳陷东部出现了大范围的褶皱和隆升，并伴随着大规模的冲积扇，与始新世早期Izanagi-Pacific洋脊的近平行俯冲相吻合。而丽水-椒江凹陷在裂陷晚期表现为扩散伸展而非集中裂陷。从始新世晚期到渐新世，该凹陷主要被碎屑-海相沉积所覆盖，并经历了由倾斜层序引起的广泛侵蚀，这与台湾地区周围的盆地具有相同的特征。台湾周围盆地的形成和演化受南海及其相关区域构造演化的控制，这一观点已被广泛接受。从南海向东延伸的角度看，东海陆架南部可能是南海被动边缘的一部分。因此，南部的ECSSB可能会受到显着的影响，南海。东部坳陷带（EDZ）开始裂陷约在中始新世，从没有发生在早始新世的挤压事件和平湖组以下的厚层反射的存在推断。(late始新世）由于太平洋板块的俯冲。东中国海板块和冲绳海槽的沉积中心先后在72 Ma、50 Ma和15 Ma的Izanagi板块、太平洋板块和菲律宾海板块的三个大洋板块的作用下向东跳跃。因此，提出了一种新的东中国海板块形成演化模式，即沉积中心跳跃的幕式拉张弧后盆地响应于三个大洋板块的俯冲作用，其北方和南方的差异分别是由南海的俯冲和打开作用主导的。东中国海板块和冲绳海槽的形成可能主要是由于大洋板块的后滚，可能是由于板块停滞和与俯冲有关的环形流，但大规模地幔流的影响不能在本研究中被唯一确定。此外，对这一区域的进一步研究将为南海的形成和演化以及大陆裂解过程提供新的认识。
Back-arc basins and the related subduction systems have been extensively studied, however back-arc basins exhibiting episodic jumps of extension centers by the subduction of different ocean slabs are poorly known. The East China Sea Shelf Basin (ECSSB) comprises two eastward-younging subparallel depression zones, and its formation and evolution is accompanied by a complicated subduction history and regional tectonic events offer an excellent opportunity to decipher the various geological features of back-arc basins. Here, we review the tectonic and sedimentary features of the subbasins in the ECSSB and its adjacent regions and then reconstruct the evolution of the sedimentary paleogeography. The west depression zone (WDZ) of the ECSSB experienced rifting in the Late Cretaceous during the subduction of the Izanagi Plate at the eastern continental boundary. In the northern WDZ, the Changjiang Depression was mainly dominated by fluvial to lacustrine deposits. This depression experienced strong compression characterized by folds and erosion during the transition from a synrift to postrift setting at the end of the Paleocene. Then another compression event occurred that resulted in extensive folds and uplift accompanied by a large-scale alluvial fan in the eastern Changjiang Depression, coinciding with the subparallel subduction of the Izanagi-Pacific ridge in the early Eocene. However, the Lishui-Jiaojiang Sag characterized by diffuse extension rather than focused rifting in its late rifting period. This sag was mainly covered by paralic to marine deposits and experienced extensive erosion caused by tilted sequences from the late Eocene to Oligocene, which shared the same characteristics as basins around the Taiwan region. It is widely accepted that the formation and evolution of basins around Taiwan were controlled by the evolving of the South China Sea (SCS) and the related regional tectonics. Considering the eastward extent of SCS, it would seem that the southern ECSSB was part of the passive margin of SCS. Accordingly, the southern ECSSB might be significantly influenced by the SCS. The east depression zone (EDZ) commenced rifting in approximately the middle Eocene as inferred from the absence of the compressional event that occurred in the early Eocene and the existence of a thick layer reflection below the Pinghu Fm. (late Eocene) due to the subduction of the Pacific Plate. The depocenters of the ECSSB and the Okinawa Trough jumped eastward successively triggered by the three oceanic slabs of the Izanagi Plate at ~72 Ma, the Pacific Plate at ~50 Ma and the Philippine Sea Plate at ~15 Ma. Thus, a new model for the formation and evolution of the ECSSB is suggested in which a back-arc basin of episodic extension with jumping depocenters in respond to subduction of three oceanic slabs, meanwhile its differences between northern and southern part are caused by the dominant subduction and opening of SCS, respectively. The ECSSB and Okinawa Trough might formed mainly by rollback of the oceanic slab, possibly, due to slab stagnation and toroidal flow related to the subduction, however the effects of large-scale mantle flow cannot be exclusively identified in this research. In addition, further research in this region will give new insights into both the formation and evolution of the SCS and the continental breakup process.
登录
查看更多内容
二叠纪以来华南大陆边缘岩浆的开启与关闭：安第斯型板块边界向西太平洋型板块边界的转变
影响因子：
2.9
作者：
Li, Zheng-Xiang;Li, Xian-Hua;Chung, Sun-Lin;Lo, Ching-Hua;Xu, Xisheng;Li, Wu-Xian
通讯作者：
Li, Wu-Xian
南海古近纪裂谷和破裂的海相沉积记录：概述
DOI：
10.1007/s11430-016-0163-x
发表时间：
2016
期刊：
Science China Earth Sciences
影响因子：
--
作者：
李前裕;吴国瑄;张丽丽;舒誉;邵磊
通讯作者：
邵磊
DOI：
10.1144/gsl.sp.2003.218.01.25
发表时间：
2003
期刊：
Geological Society, London, Special Publications
影响因子：
--
作者：
R. Harris
通讯作者：
R. Harris
影响因子：
--
作者：
Y. Ricard;C. Doglioni;R. Sabadini
通讯作者：
Y. Ricard;C. Doglioni;R. Sabadini
影响因子：
4.4
作者：
Gurnis, Michael;Turner, Mark;Bower, Dan J.
通讯作者：
Bower, Dan J.