Paleogene marine deposition records of rifting and breakup of the South China Sea: An overview
Paleogene marine deposition records of rifting and breakup of the South China Sea: An overview
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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
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
邵磊
中科院分区：
文献类型：
--
作者：
李前裕;吴国瑄;张丽丽;舒誉;邵磊
摘要通过对中国东南部近海海洋沉积物的整理，揭示了古近纪南海断裂和裂解的证据。早在古新世东海-台湾地区的海洋沉积开始，然后在始新世中期向西南扩展到南海地区。我们的资料表明，在这些地区存在一个拉长的古近纪中国海，它沿着东北向构造带伸展，可能是古太平洋西部边缘的一部分。始新世中期的海洋影响向西南方向转移是对南海地区强烈裂陷和沉降的响应，而东海-台湾地区的海洋在始新世晚期之后开始收缩和变浅，可能与台湾-台西南盆地地区的局部裂解和初始扩张有关。在ODP 1148和IODP U1435从大陆-海洋边界附近和许多其他陆架-斜坡站点的半远洋沉积物的积累是响应于34至33 Ma前的大规模解体，随后导致南海在渐新世的诞生。
A compilation of available marine deposition data from offshore S-SE China reveals evidence of rifting and breakup of the South China Sea (SCS) during the Paleogene. Marine deposition started earlier in the Paleocene in the East China Sea (ECS)-Taiwan region before expanding southwestward into the SCS region in the middle Eocene. Our data indicate the existence of an elongated Paleogene China Sea in these areas stretching along the northeasterly structural belts, probably as part of the marginal western paleo-Pacific. The southwestward shift of marine influence in the middle Eocene was responding to a period of intensive rifting and subsidence in the SCS region, while the sea in the ECS-Taiwan region started to shrink and shoal after the late Eocene, likely associated with local breakup and initial spreading in the Taiwan-Taixinan Basin area. The accumulation of hemipelagic sediments at ODP 1148 and IODP U1435 from near the continent-ocean boundary and at many other shelf-slope sites was in response to a large-scale breakup 34 to 33 Ma ago, subsequently leading to the birth of the SCS in the Oligocene.