南海北部渐新世末的构造事件

邵磊; 庞雄; 张功成; 乔培军; 李前裕; 韦刚健; 吴梦霜

Volume 34 Issue 5

Sep. 2009

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Article Navigation > Earth Science > 2009 > 34(5): 717-724

SHAO Lei, PANG Xiong, ZHANG Gong-cheng, QIAO Pei-jun, LI Qian-yu, WEI Gang-jian, WU Meng-shuang, 2009. Late Oligocene Tectonic Event in the Northern South China Sea and Its Implications. Earth Science, 34(5): 717-724.

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Late Oligocene Tectonic Event in the Northern South China Sea and Its Implications

1.
State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
2.
CNOOC Ltd., Shenzhen Branch, Guangzhou 510240, China
3.
Beijing Research Center of CNOOC Ltd., Beijing 100027, China
4.
Guangzhou Institute of Geochemistry, CAS, Guangzhou 510640, China

Received Date: 2009-03-01
Publish Date: 2009-09-25

Abstract

Abstract

A significant tectonic event was recorded in late Oligocene sediments from ODP Site 1148 and Pearl River Mouth Basin.This tectonic event coincided with the seafloor spreading axis jump event across the Oligocene/Miocene boundary, leading to a series of changes not only in seafloor spreading direction but also types of sedimentary basins and sediment provenances, and representing the greatest tectonic activity in the South China Sea region since the Oligocene.Sedimentation breaks and slumps as well as obvious changes in sediment composition across the Oligocene/Miocene boundary indicate the existence of the tectonic event, which transformed the Pearl River Mouth Basin from a graben basin to a down-warped basin, and the sedimentary environment in the Baiyun Sag area from continental shelf in the late Oligocene to continental slope since the early Miocene.It played a key role in the transformation of the general topographic character in continental China and ended a period of accumulation of good source rock for petroleum offshore.Therefore, this tectonic event has a profound influence on the evolution of the South China Sea and East Asia.
- South China Sea,
- Baiyun Sag,
- Oligocene,
- seafloor spreading,
- tectonic event

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Late Oligocene Tectonic Event in the Northern South China Sea and Its Implications

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