南海海盆演变与深部海流  

Evolution of the South China Sea basin and the deep circulation

作　　者：翦知湣[1] 田军[1] 黄维[1] 马小林 万随 JIAN Zhimin;TIAN Jun;HUANG Wei;MA Xiaolin;WAN Sui(State Key Laboratory of Marine Geology,School of Ocean and Earth Science,Tongji University,Shanghai 200092,China;Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;South China Sea Institute of Oceanography,Chinese Academy of Sciences,Guangzhou 310012,China)

机构地区：[1]同济大学海洋与地球科学学院,海洋地质国家重点实验室,上海200092 [2]中国科学院地球环境研究所,西安710061 [3]中国科学院南海海洋研究所,广州310012

出　　处：《科技导报》2020年第18期52-56,共5页Science & Technology Review

基　　金：国家自然科学基金重大研究计划项目(91428310);国家重点研发计划项目(2018YFE0202400)。

摘　　要：南海在距今34 Ma之前的始新世从陆地变为海洋,古水深不断加深,至距今24 Ma之前的中新世/渐新世之交,由于T60构造运动,南海海盆整体进入深海环境。但是,自中新世以来随着吕宋岛弧向欧亚板块碰撞,南海海盆的半封闭程度在距今10.0、6.5、3.0和1.2 Ma之前加剧,导致南海深部海水只能来自巴士海峡海槛深度2600 m以浅的太平洋。此后,巴士海峡两侧的南海与太平洋深部海水交换,由于全球海平面变化,呈现冰期/间冰期模式。The present-day South China Sea(SCS)was evolved from land to sea in the Eocene 34 million years ago,and its paleo-water was very deep.At the turn of the Miocene/Oligocene,24 million years ago.due to the T60 tectonic movement,the entire SCS basin became a deep-sea environment.Since the Miocene,10.0,6.5 and 1.2 million years ago,along with the collision of the Luzon island arc with the Eurasian plate,the semi-closed degree of the SCS basin increased,so that the SCS deep-water could only come from the Pacific above the sill depth(〜2600 m)of the Bashi Strait.After that,due to the global sea level change,the deep-water exchange between the SCS and the Pacific on both sides of the Bashi Strait displayed the glacial/interglacial mode.

关 键 词：深水古海洋学 南海 海盆演变 冰期旋回 

分 类 号：P73[天文地球—海洋科学]