干旱区生态环境知识资源中心(Arid): 柴达木盆地新生代以来的气候变化研究:来自碳氧同位素的证据

Arid

	柴达木盆地新生代以来的气候变化研究:来自碳氧同位素的证据
其他题名	Cenozoic Climate Changes in the Qaidam Basin, Western China: Evidenced From Carbon and Oxygen Stable Isotope
	尹成明 1; 李伟民 2; 刘永江 2; 陈元忠 ; 巩庆林
ISSN	1671-5888
出版年	2007
卷号	37 期号:5 页码:901-907
中文摘要	青藏高原北缘柴达木盆地内部始新世-更新世的碳酸盐中的碳、氧同位素分析结果显示了几次与区域性气候变化和构造运动相关的地质事件,包括青藏高原形成和隆升.新生代厚层的湖相-陆相沉积物记录了在中新世时气候以干旱条件为主.红三旱剖面中出现了两个较短1 Ma到3 Ma的delta~(13)C变化周期.通过稳定同位素的研究可以识别出4个明显的构造事件:(1)上干柴沟组晚期delta~(13)C和delta~(18)O出现明显的增加,反映周边山脉的隆升;(2)上干柴沟组和下油砂山组界限处delta~(13)C和delta~(18)O的剧减,反映了整个柴达木盆地的总体抬升和喜马拉雅山在24 Ma左右的隆起;(3)19～18 Ma同位素数据出现的正异常峰值应该和阿尔金山的强烈隆起有关,同时盆地相对沉降,地貌高差增大,气候变得干旱;(4)12 Ma的明显负异常反映了整个柴达木盆地的海拔又一次增高,而盆地本身相对沉降用边山脉隆升.
英文摘要	Carbon and oxygen stable isotope analyses on Eocene to Holocene carbonates from the Qaidam Basin at the northeastern edge of the Tibetan plateau in Western China show several distinct events related to regional climate and tectonism involving in the formation and uplift of the Tibetan plateau. The stable isotope record of the thick Cenozoic lacustrine-terrestrial sedimentary sequence indicates that the climates of Miocene were dominated by arid conditions. Carbon isotope data of the Hongsanhan section reveal two small and short cycles of 1 Ma to 3 Ma duration. Based on the results of stable isotope data, four distinct tectonic events can he detected: (1) An increase of the delta~(13)C and delta~(18)O values in Late stage of Shangganchaigou Formation should corespond to the surrounding mountain uplifting; (2) A sharp decrease both delta~(13) C and delta~(18) O values around the boundary between the Shangganchaigou Formation and Xiayoushashan Formation reveal a height increase of the whole basin and the uplifting event of Himalaya at ca. 24 Ma; (3) Positive isotopic ratios at 19 Ma to 18 Ma coincide with the strongest uplifting of the Altyn Mountains and the subsidence of the basin, resulting in drought climate; (4) Another height increase of the whole basin is documented by highly negative ratios at 12 Ma with the pronounced basin subsidence and relative mountain uplifting.
中文关键词	青藏高原 ; 柴达木盆地 ; 稳定同位素 ; 隆升
英文关键词	Tibetan plateau Qaidam Basin stable isotope uplift
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:2931236
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221175
作者单位	1.中国科学院,广州地球化学研究所, 广州, 广东 510640, 中国; 2.吉林大学,地球科学学院, 长春, 吉林 130061, 中国; 3.奥地利萨尔茨堡大学,地质古生物系, Austria
推荐引用方式 GB/T 7714	尹成明,李伟民,刘永江,等. 柴达木盆地新生代以来的气候变化研究:来自碳氧同位素的证据[J],2007,37(5):901-907.
APA	尹成明,李伟民,刘永江,陈元忠,&巩庆林.(2007).柴达木盆地新生代以来的气候变化研究:来自碳氧同位素的证据.,37(5),901-907.
MLA	尹成明,et al."柴达木盆地新生代以来的气候变化研究:来自碳氧同位素的证据".37.5(2007):901-907.