东昆仑阿拉克湖地区近2ka以来风成沙沉积的气候变迁记录

向树元; 喻建新; 王国灿; 双燕; 吴燕玲

Volume 28 Issue 6

Nov. 2003

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Article Navigation > Earth Science > 2003 > 28(6): 669-674

XIANG Shu-yuan, YU Jian-xin, WANG Guo-can, SHUANG Yan, WU Yan-ling, 2003. Deposit Response to Important Tectonic Events of Cenozoic Plateau Uplift, East Segment of Eastern Kunlun Mountains. Earth Science, 28(6): 669-674.

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Deposit Response to Important Tectonic Events of Cenozoic Plateau Uplift, East Segment of Eastern Kunlun Mountains

Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Received Date: 2003-05-15
Publish Date: 2003-11-25

Abstract

Abstract

Sporopollen analysis to aeolian sand section at the east bank of the Alakehu, eastern Kunlun, shows a climate variance process in recent 2 000 a which happened 4 periods of warm and cold alternation. The warm periods occurred during 20-180, 330-410, 700-920 and 1 140-1 380 a respectively, and the cold periods during 180-330, 410-700, 920-1 140 and 1 380-1 920 a. The climates were warm-dry-slightly damp during warm periods and warm-slightly cold and dry during cold period. 700-920 a is the warmest and dampest period in recent 2 000 a, which is implied by the rich of rhus, that mainly distribute in semitropical zone and temperate zone and also rich of arbor sporopollen, and is accorded to the warm period of eastern China in Tang Dynasty which is recorded by the history documents. After 1 500 a, lacking of sporopollen shows that either arbor or herbage decreased sharply when the Little Ice Age came and became almost extinct nowadays. The authors suggest that cooling and drying in (about) 300 a the Little Ice Age is the main reason to the extinction of the arbor, not the people activity.
- climate variance,
- sporopollen analysis,
- eastern Kunlun Mountains,
- Alakehu

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References(15)

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