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亚洲季风系统的起源和发展及其与两极冰盖和区域构造运动的时代耦合性
引用本文:刘东生,郑绵平,郭正堂.亚洲季风系统的起源和发展及其与两极冰盖和区域构造运动的时代耦合性[J].第四纪研究,1998,18(3):194-204.
作者姓名:刘东生  郑绵平  郭正堂
作者单位:[1]中国科学院地质研究所 [2]地质矿产部矿床地质研究所
摘    要:本文基于对我国新生代环境记录的分析,揭示出在早第三纪,气候带大致呈行星风系控制下的东西走向格局。东南部地区在渐新世开始湿润化,显示了东南季风的雏形,可称为雏形季风阶段。中新世中期东南和西南部显著湿润化,标志着东南和西南季风的形成,可称为成形季风阶段。中新世末和上新世形成的“红粘土”的风尘特性是冬季风和中国北方与中亚干旱化的重要标志。第四纪以来中国环境发生的重要转变表现为季风强度的变化与气候波动周期的改变。上述重大环境事件在时代上分别与两极冰盖的起源和演化以及东亚构造运动有较好的吻合性。我们认为,这种季风一冰盖一构造的耦合关系可能是通过不同机制共同作用的结果。

关 键 词:构造一气候旋回  季风起源  第三纪  干旱化
收稿时间:1998-05-26
修稿时间:1998-05-31

INITIATION AND EVOLUTION OF THE ASIAN MONSOON SYSTEM TIMELY COUPLED WITH THE ICE-SHEET GROWTH AND THE TECTONIC MOVEMENTS IN ASIA
Liu Tungsheng, Zheng Mianping, Guo Zhengtang.INITIATION AND EVOLUTION OF THE ASIAN MONSOON SYSTEM TIMELY COUPLED WITH THE ICE-SHEET GROWTH AND THE TECTONIC MOVEMENTS IN ASIA[J].Quaternary Sciences,1998,18(3):194-204.
Authors:Liu Tungsheng  Zheng Mianping  Guo Zhengtang
Institution:1. Institute of Geology, Chinese Academy of Sciences, Beijing 100029;
2. Institute of Ore, Ministry of Geology and Minerla Resources, Beijing 100037
Abstract:A large variety of geological evidences are presented and summarized here tOaddress the links of the different components of the Asian monsoon system, ice-sheetchanges and the regional tectonic movementS in Asia over the Cenozoic Era.Environmental indicators (coal beds, salt and gypsum deposits, paleo-vegetationremains etc.) from the presently monsoonal regions provide the terrestrial evidences ofthe inceptions of the Southeast Asian summer monsoon, the Southwest Asian summermonsoon and the NorthWest Asian winter monsoon. The Paleocene and the Eoceneenvironmental patterns in China were dominated by roughly zonal climates resultedfrom the planetary wind system. The decrease in the aridity for the southeasterncountry in the Oligocene indicates the inception of the southeast summer monsoon.Conspicuous changes have occurred for the Miocene when the originally aridsouth-western pat of the country became much more humid , indicating the initiation of the south-west summer monsoon. The south-east summer monsoon was alsosignificantly strengthened at the same bine. The geographic location of the arid regionin the northern China was further close to the present-day one. Another drastic change occurred around the farest Miocene when extensive aeolian dust began tOdeposit in the northern China, indicating the emergence of the north-east wintermonsoon and an increase in the continental aridity in cental Asia. Since then, twosignificant climate shifts occurred near 2.5Ma B.P. and 0.9Ma B.P., as shown by theIoess-paleosol sequences.These drastic environmental changes were roughly synchronous with the initiation and the evolution of the polar ice-sheet ,as well as the tectonic movementS in Asia.The temporary coupling of the atmosphere-ice -sheet-tectonic movements may beattributed to a number of mechanisms.
Keywords:tectonic-climate cycle  initiation  of monsoon  Tertiary  aridification
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