CLAY MINERALS INDICATORS OF PALEOCLIMATE CHANGES OF CHENGDU PLAIN SINCE 4 kaBP

LUO Hong; ZHU Li-dong; ZHANG Qing; YANG Wen-guang; KAN Ai-ke; XIANG Fang; LUO Li-ping; JIANG Zhang-hua; ZHU Zhang-yi

Marine Geology & Quaternary Geology > 2007 > 27(4): 117-122.

LUO Hong, ZHU Li-dong, ZHANG Qing, YANG Wen-guang, KAN Ai-ke, XIANG Fang, LUO Li-ping, JIANG Zhang-hua, ZHU Zhang-yi. CLAY MINERALS INDICATORS OF PALEOCLIMATE CHANGES OF CHENGDU PLAIN SINCE 4 kaBP[J]. Marine Geology & Quaternary Geology, 2007, 27(4): 117-122.

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CLAY MINERALS INDICATORS OF PALEOCLIMATE CHANGES OF CHENGDU PLAIN SINCE 4 kaBP

1 Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;
2 Institute of Archaeology of Chengdu City, Chengdu 610072, China;
3 Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

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Received Date: April 16, 2007
Revised Date: June 27, 2007

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Abstract

By the analyses of the X-ray diffraction, contents of clay minerals of the sediments from Jinsha site IT6814 of Chengdu are measured. The results show that the main types of the clay minerals are illite, chlorite, illite-montmorillonite and kaolinite. Analyses and study on these clay mineral types and contents show that Chengdu plain can be divided into five phases. Climate in Chengdu plain went from temperate-cool and a little dry to warm and moist. The temperature decreased abruptly since 2 500 aBP.And the influence of the ancient activity on the clay mineral is low. So the ingredient and content of clay mineral may be taken as the climatic indicator.
- clay minerals,
- 4 ka,
- paleoclimate

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References

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CLAY MINERALS INDICATORS OF PALEOCLIMATE CHANGES OF CHENGDU PLAIN SINCE 4 kaBP

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