| 中国大陆及邻区中生代—新生代大地构造与环境变迁 |
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| 引用本文： | 万天丰,朱鸿.中国大陆及邻区中生代—新生代大地构造与环境变迁[J].现代地质,2002,16(2):107-120. |
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| 作者姓名： | 万天丰 朱鸿 |
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| 作者单位： | 中国地质大学地球科学与资源学院,北京,100083 |
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| 摘 要： | 在系统研究古地磁、周边板块的运动学特征、板内变形、构造应力场和沉积古地理资料的基础上 ,恢复了中国大陆及邻区中、新生代 6个时期的大地构造演化特征、构造古地理 ,并进而探讨了对环境变迁的影响。 6个时期的划分、构造特征及其古地理环境分别为 :印支期 (2 5 0～ 2 0 8Ma) ,NE -SW向缩短 ,中国大部分大陆完成拼合 ,南方以海为主 ,北方以陆地为主 ;燕山期 (2 0 8～ 135Ma) ,NW -SE向缩短 ,大陆地块逆时针旋转 2 0°～ 30° ,东部形成高地 ,西部为低地 ;四川期 (135～ 5 2Ma) ,NE -SW向缩短 ,以盆岭地形为主 ;华北期 (5 2～ 2 3 3Ma) ,太平洋板块第一次向西俯冲、挤压 ,中国东部形成 3条东西向山脉和 4个汇水盆地 ;喜马拉雅期 (2 3 3～ 0 78Ma) ,印度板块与欧亚大陆碰撞 ,青藏高原隆升 ,其他地块相对沉降 ;新构造期 (0 78Ma以来 ) ,周边各板块保持相对均衡状态 ,逐步构成现代地貌。研究表明 ,大地构造是古地理环境变化的主要控制因素。
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| 关 键 词： | 中、新生代 大地构造 古地理环境 古地磁学 |
| 文章编号： | 1000-8527(2002)02-0107-14 |
| 修稿时间： | 2002年4月25日 |
TECTONICS AND ENVIRONMENT CHANGE OF MESO-CENOZOICIN CHINA CONTINENT AND ITS ADJACENT AREAS |
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| WAN Tian-feng,ZHU Hong.TECTONICS AND ENVIRONMENT CHANGE OF MESO-CENOZOICIN CHINA CONTINENT AND ITS ADJACENT AREAS[J].Geoscience——Journal of Graduate School,China University of Geosciences,2002,16(2):107-120. |
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| Authors: | WAN Tian-feng ZHU Hong |
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| Abstract: | Depending on the systematical research data of paleomagnetism, motion of surrounding plates, intraplate deformation, tectonic stress field and sedimentary paleo geography, the authors discuss the tectonics and tectono paleogeography and their influences on the paleo environment changes of China continent and its adjacent areas in six stages of Mesozoic-Cenozoic, involving the following characteristics of tectonics and paleo geographic environments:In the Indosinian stage (250-208 Ma), there was NE-SW trending shortening,the most of China continent amalgamated,the sea mainly distributed in south and land in north;In the Yanshanian stage (208-135 Ma), there was NW-SE trending shortening and the counterclockwise rotation in 20°-30°occurred , highland mainly in the east and lowland in the west;In the Sichuanian stage (135-52 Ma), there was NE-SW trending shortening,the geomorphology was characterized by basins and ridges;In the North Sinian stage (52-23 3 Ma), the Pacific Plate firstly subducted and compressed to the west,and then three E-W trending mountains formed in eastern China;In the Himalayan stage (23 3-0 78 Ma), the Indian Plate amalgamated to Eurasian continent,as a result the Qinghai-Xizang Plateau uplifted and others relatively depressed;and in the Neotectonic stage (0 78 Ma-), there are the relative balance among the surrounding plates and going to recent geomorphology. It is obvious that the tectonics is really the major factor to control the paleo geographic environment changes. |
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| Keywords: | Mesozoic-Cenozoic tectonics paleo geographic environment paleomagnetism |
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