干旱区生态环境知识资源中心(Arid): 塔里木盆地南缘沉积物磁化率、delta13C与粒度及其气候环境意义

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	塔里木盆地南缘沉积物磁化率、delta13C与粒度及其气候环境意义
其他题名	The correlation and climatic significance of the mass susceptibility, carbonate delta13C and grain size revealed from a historic sediment in the southern margin of Tarim Basin
	钟巍 1; 王立国 2; 李偲 3
来源期刊	地理研究
ISSN	1000-0585
出版年	2005
卷号	24 期号:1 页码:98-104
中文摘要	本文研究表明,塔里木盆地南缘湖沼相沉积物质量磁化率与碳酸盐delta13C呈正相关关系,与粒度参数中0.56～35.57mum各组分呈显著负相关,其中同17.83～31.70mum部分负相关性最为显著;与56.37～224.4mum之间各组分显著正相关,其中与70.96～200mum各组分正相关性最为显著.其气候环境背景与意义表现为:在寒冷期中,delta13C偏轻,相对湿度和植被盖度增加,地表侵蚀减弱,只有较细物质才能向湖泊沼泽搬运加积,地表氧化环境减弱,磁化率减小;而在温暖期中,则相反.在区域对比基础上,根据上述指标将近4.0ka以来此地区气候环境变化划分了8个阶段.本文的各种指标(特别是粒度指标)与Greenland GISP2冰芯delta18O记录之间有很好的吻合,表明研究区近4.0ka以来的气候与环境变化可能具有全球背景.
英文摘要	Study of a historic sediment in the south margin of the Tarim Basin, where is influenced by the Westerlie force evidently, shows that the mass susceptibility correlates positively with carbonate delta13C and strongly with the components of 56. 37 - 224. 4mum(especially with components of 70. 96 -200mum), but correlates negatively with the compo-nents of 0. 56 - 35. 57fim (especially with components of 17. 83 - 31. 70mum.). The correlation among three proxies bears profound significance of climate and environmental changes. When temperature declined in the extreme arid area, the relative humidity increased greatly, resulting in restrains of evaporation and prosperity of vegetation, protecting the land surface from erosion, and only relative finer debris can be carried to deposit in lake, carbonate delta13C declined. Less oxidation strength during a relatively cold period led to lower mass susceptibility. Conversely, when temperature increased, relative humidity declined sharply and resulted in increase in evaporation, the vegetation cover reduced so that the erosion intensity on the land surface increased, leading to coarser component being loaded and deposited in lake and rise in carbonate delta13C. Strengthened oxidation during a relatively warm period resulted in an increase in mass susceptibility. Based on the interpretation of the proxies and widely regional comparison, this paper identifies 8 characteristic climatic periods during the last 4. Oka. Most significantly, the similarity which can be observed between the fluctuation of climate proxies in this paper (especially the proxies of grain size) and the Greenland GISP2 ice core delta18O record shows that climate change of the studied area may have global background, and on the other hand, it also incarnates evident regional characteristics.
中文关键词	塔里木盆地南缘 ; 质量磁化率 ; 粒度参数 ; 气候环境变化
英文关键词	delta13C southern margin of Tarim Basin mass susceptibility grain size carbonate delta~(13)C climate change
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1909764
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206013
作者单位	1.华南师范大学地理系, 广州, 广东 510631, 中国; 2.新疆大学资源环境科学学院, 乌鲁木齐, 新疆 530046, 中国; 3.新疆大学资源环境科学学院, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	钟巍,王立国,李偲. 塔里木盆地南缘沉积物磁化率、delta13C与粒度及其气候环境意义[J]. 新疆大学,2005,24(1):98-104.
APA	钟巍,王立国,&李偲.(2005).塔里木盆地南缘沉积物磁化率、delta13C与粒度及其气候环境意义.地理研究,24(1),98-104.
MLA	钟巍,et al."塔里木盆地南缘沉积物磁化率、delta13C与粒度及其气候环境意义".地理研究 24.1(2005):98-104.