沉积学报2012，Vol.30Issue(5)：945-954,10.
新疆柴窝堡湖沉积物中环境敏感粒度组分揭示的环境信息
Environmental Changes Inferred from Environmentally Sensitive Grain-size Component Records in Chaiwopu Lake, Xinjiang
摘要
Abstract
Grain-size analysis of a sediment core CW02 and surface sediments of the drainage area, retrieved from Chaiwopu Lake of Xinjiang, were carried out using a Malvern 2 000 grain-size analyzer. Combining with 137 Cs dating, a continuous high-resolution record of environmental changes was studied over the past 150 years. Firstly, according to primary components analysis of the contents of different grain-size, the material source of lake sediment was dis- cussed. It showed that the large particle fraction of lake sediment was from the drainage surface sediment. And then, environmentally sensitive grain-size components were extracted by the variations of the grain-size standard deviation. The results indicated that the content/mean-size of sensitive grain-size component (20 ~ 209 p~m) is sensitive to the regional sand-dust storm events in Chaiwopu lake basin. During the last 150 years, the strong sand-dust storm oc- curred during 1910--1930AD and 1980--2000AD. Historical documents also recorded the strong dust storms around 1910s and 1980s. Based on the analysis of the abrupt change points, the sediment grain-size increased abruptly a- round 1910AD, which indicated an abrupt environmental event.关键词
柴窝堡湖/湖泊沉积/粒度/敏感组分Key words
Chaiwopu Lake/lake sediment/grain size/sensitive components分类
天文与地球科学引用本文复制引用
马龙,吴敬禄,吉力力·阿不都外力..新疆柴窝堡湖沉积物中环境敏感粒度组分揭示的环境信息[J].沉积学报,2012,30(5):945-954,10.基金项目
中国科学院知识创新重要方向性项目（编号：KZCX2-EW-308 （）
KZCX2-YW-GJ04）,中国科学院“西部之光”人才培养计划西部博士项目（编号XBBS201106）共同资助. （）
