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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (2): 463-469    DOI: 10.7522/j.issn.1000-694X.2013.00063
    
Geochemical Features and Palaeoenvironmental Indications ofAeolian Sediments on the East of Qinghai Lake
SHANG Yuan1, LU Rui-jie1, JIA Fei-fei1, TIAN Li-hui1, TANG Qing-liang2, CHEN Yuan1, ZHAO Chao1, WU Wang-yang1
1.Ministry of Education Key Laboratory of Environmental Change and Natural Disaster, Beijing Normal University, Beijing 100875, China;
2.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
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Abstract  

As the largest inland lake of China, along with its unique landscape and geographical location, Qinghai Lake has got much attention of the researchers for a long time. The precursors have done substantive researches by using the lake sediments, which have deepened our understanding on the climate changes in the region. Although sand dunes and loess sediments are widely distributed around the lake, so far the researches on geochemical elements from aeolian sediment have been less reported. Based on the systematic sampling from aeolian sediments at sandy land on the east of Qinghai Lake, through analysis on 7 main geochemical elements, combining with optically stimulated luminescence (OSL) dating results and the previous researches, we discussed climate changes in Qinghai Lake area since 12.5 ka BP and came to the following conclusions: (1) Before 12.5 ka BP, the climate there was dry and cold accompanied with strong wind-sand activities. (2) In 12.5-11.9 ka BP, the climate turned to warm and wet. However, there was an abrupt climate cooling event during 12.2-11.9 ka BP, which likely responded to the Younger Dryas event. (3) In 11.9-8.0 ka BP, the climate fluctuated significantly and frequently from warm to cold and this period witnessed 3 cooling events. (4) In 8.0-2.6 ka BP, the climate was warm and humid. (5) Since 2.6 ka BP, similar to the modern climate, the main feature of the climate was dry and cold.

Key words:  Qinghai Lake      OSL dating      geochemical elements      climate change     
Received:  05 June 2012      Published:  11 July 2012
ZTFLH:  P532  

Cite this article: 

SHANG Yuan1, LU Rui-jie1, JIA Fei-fei1, TIAN Li-hui1, TANG Qing-liang2, CHEN Yuan1, ZHAO Chao1, WU Wang-yang1. Geochemical Features and Palaeoenvironmental Indications ofAeolian Sediments on the East of Qinghai Lake. JOURNAL OF DESERT RESEARCH, 2013, 33(2): 463-469.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00063     OR     http://www.desert.ac.cn/EN/Y2013/V33/I2/463

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