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Coupling Relationship between the Red Earth Evolution, Climate Change and Tectonic Movement in China

HUANG Zhen guo, ZHANG Wei qiang (Guangzhou Institute of Geography, Guangzhou 510070)  
It is generally considered that the evolution period of red earth is corresponded with the warm period of interglacial but the relationship between climate (red earth) and tectonic movement has not discussed well. The problem is still remained whether the warm period was associated with the relatively stable period or with the active period of tectonic movement. This paper hold the former point of view. The dating and distribution of red earth during N 2, Q 1, Q 2 and Q 3 show that the formation and evolution of monsoon circulation can be divided into 5 stages in China. In addition, the relationship between red earth and climate is also presented by the unanimity each other of cycles. Since early Pleistocene there were 10, 9 and 10 cycles of earth-climate in North China, the area of middle lower reach of Yangtze River and South China, respectively. The average main periodicity is 100~120 ka and the secondary is 60~70 ka. Taking the climate cycles of loess paleosoil series as a time mark, the multi layer red earth in south area of China can be contrasted with the interculated red layers in Loess one by one. The coupling relationship between red earth and the stages of neotectonics is obvious, for example, the deformed elevation of red earth of several periods of N 2, Q 1 and Q 2 indicates three important tectonic events since late Pliocene in China. These events are regarded as the main reason causing the formation of three large stepes of China's relief, which is marked by the distribution of red earth. The deformed emplitude of red earth is different in space and time showing the moving of block fault movement. Finally, by comparing the corresponding relation between cycles of red earth, uplift stages of Xizang Qinghai (Tibet) Plateau and development periods of monsoon circulation, three main cycles of tectonics-climate are deduced, namely the first (before 1 4 Ma BP), the second (1 4~0 64 Ma BP) and the third (since 0 64 Ma BP). For each cycle, two stages can also be divided, the former is characterized by relatively stable tectonics and warm climate, the latter, the active tectonics and cold climate.
【Fund】: 广东省自然科学基金资助项目!( 92 0 2 3 5)&&
【CateGory Index】: P534.6;P467
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