干旱区生态环境知识资源中心(Arid): 萨拉乌苏河酒坊台剖面末次间冰阶以来的气候环境演化

Arid

	萨拉乌苏河酒坊台剖面末次间冰阶以来的气候环境演化
其他题名	The climatic-environmental evolution since the interstadial epoch of the last glaciation along the Jiufangtai profile of the Salawusu River Valley
	杨劲松 1; 王永 2; 周赤华 3; 江南 2; 董进 2
来源期刊	中国地质
ISSN	1000-3657
出版年	2014
卷号	41 期号:6 页码:2122-2131
中文摘要	酒坊台剖面位于萨拉乌苏河流域下游,其中末次间冰阶以来主要为风成砂沉积,间夹砂质古土壤和湖沼相粘土层等,对环境信息有良好的记录。OSL年龄结果表明该剖面顶部记录了末次冰期间冰阶(约52 ka B.P.)以来的气候演化历史。通过对剖面高精度的粒度和磁化率分析,结合Rb、Sr元素含量及其比值综合分析,表明末次冰期间冰阶以来该剖面自上而下可划分为3个主要层段,对应了深海氧同位素MIS 1~3。同时在MIS 3阶段呈现出明显的MIS 3a、3b、3c亚段,结合区域研究资料,表明萨拉乌苏河流域在中长时间尺度上,对全球性和区域性气候事件有良好的沉积响应。
英文摘要	The Salawusu River Valley, located in the transition zone between the loess plateau and the Mu Us desert, has kept sensitive records of paleoclimate since the last interglacial period. The profile which contains the aeolian sand with some interbeddings of sandy soil and limnetic paleosol facies in the downstream part of the valley was recently termed Jiufangtai Stratigraphic Section. In this paper, the authors focused the study on the top section since the interstadial epoch of the last glaciation and employed a series of geological methods, such as the AMS-~(14)C, OSL dating method, grain size, magnetic susceptibility, Rb, Sr elements and their ratios. Based on the data obtained and the climatic-stratatigraphic comparison with the relative marine isotope stage, the authors further divided the strata into the following sequences:(1) the MIS 1 sequence (0~11 ka B.P.), which was a mainly dry period at the beginning of the Holocene, consistent with records from the arid-semiarid transition zones in other places. And the 1.5~1.8 cal ka B.P. was a wet phase when the modern Salawusu River formed;(2) MIS 2 sequence (11~28 ka B.P.), which was a lasting and stable dry and cold period; (3) MIS 3 sequence (28~52 ka B.P.), which mainly contained 2 warm and humid periods (MIS 3a and MIS 3c), and a cold period (MIS 3b), similar to things of MIS 1. The lacustrine facies in MIS3 sequence was similar to the particular warm and wet stage in the Tibetan Plateau and its adjacent areas, which recorded the strong summer monsoon event during 30~40 ka B.P.. It is concluded that the paleoclimatic records had a comparable sedimentary response to the global and regional climate events. Thus, the valley is an ideal zone for studying climate changes in China. In addition, some comprehensive analysis should be conducted in the reconstruction of the valley paleoenviroment history, because there are varying degrees of limitations in different assumptions.
中文关键词	粒度 ; 磁化率 ; Rb和Sr ; 末次间冰阶 ; 萨拉乌苏河
英文关键词	grain size magnetic susceptibility Rb and Sr elements interstadial epoch of the last glaciation,Salawusu River Valley
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5321446
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232049
作者单位	1.中国地质科学院水文地质环境地质研究所, 石家庄, 河北 050061, 中国; 2.中国地质科学院地质研究所, 北京 100037, 中国; 3.内蒙古赤峰地质矿产勘查开发院, 赤峰, 内蒙古 024005, 中国
推荐引用方式 GB/T 7714	杨劲松,王永,周赤华,等. 萨拉乌苏河酒坊台剖面末次间冰阶以来的气候环境演化[J],2014,41(6):2122-2131.
APA	杨劲松,王永,周赤华,江南,&董进.(2014).萨拉乌苏河酒坊台剖面末次间冰阶以来的气候环境演化.中国地质,41(6),2122-2131.
MLA	杨劲松,et al."萨拉乌苏河酒坊台剖面末次间冰阶以来的气候环境演化".中国地质 41.6(2014):2122-2131.