沉积学报2012，Vol.30Issue(5)：928-936,9.
新疆伊犁晚全新世风成沙—古土壤序列磁化率特征及气候变化
Late Holocene Climate Change Revealed by the Magnetic Susceptibility of Paleoaeolian Sand-Paleosol Sedimentary Sequence in Yili Valley of Xinjiang
摘要
Abstract
By studying on correlation between magnetic susceptibility,TOC, CaCO3, Fe203and grainsize component of 73 samples from the paleosand-paleosol sedimentary section of Xinjiang Takermohuer desert, according to OSL date ,we discussed mechanism of magnetic susceptibility change and paleoclimate significance. The results were that : The corre- lation betweenxlfand percent content of 16 ~ 250 p,m component was positive, coarse component percent content affect- ed the change of X1f. In the section, Xlf of paleosand is higher than Xlf of paleosol, this characteristic is opposite to mag- netic susceptibility of monsoon desert sediment in China. According to magnetic susceptibility and other paleoclimate indexes of section sediment, we divided 5 paleoclimate stages of study area from 3.71 ka BP: 3.71 - 3.06 kaBP, the climate was cool and wet,from 3.06 kaBP to 2.78 kaBP was cold and dry,2.78 ~2.10 kaBP was cool wet,2.10 -0. 50 kaBP was cold and wet,0.50 kaBP to now was warm and dry. Climate change of research area is simliar to the oth- er regiones during late holocene, and it was related to the temperature change events of surface sea-water in north Alantic Ocean. The climate change was typical westerly climate model,warm-dry or cool-wet.关键词
风成沙—古土壤/磁化率/晚全新世/气候变化/新疆伊犁Key words
paleosand-paleosol/magnetic susceptibility/late holocene/climatic change/Yili of Xinjiang分类
天文与地球科学引用本文复制引用
凌智永,李志忠,武胜利,靳建辉,闫映宇..新疆伊犁晚全新世风成沙—古土壤序列磁化率特征及气候变化[J].沉积学报,2012,30(5):928-936,9.基金项目
国家“十一五”科技支撑计划项目（编号：2007BACl5807）,新疆维吾尔自治区自然科学基金项目（编号：200821103）资助. （）
