气候变化领域集成服务门户(CCPortal): PLIOCENE-PLEISTOCENE CLIMATE CHANGE AT THE NE TIBETAN PLATEAU DEDUCED FROM LITHOFACIES VARIATION IN THE DRILL CORE SG-1, WESTERN QAIDAM BASIN, CHINA

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DOI	10.2110/jsr.2012.76
	PLIOCENE-PLEISTOCENE CLIMATE CHANGE AT THE NE TIBETAN PLATEAU DEDUCED FROM LITHOFACIES VARIATION IN THE DRILL CORE SG-1, WESTERN QAIDAM BASIN, CHINA
	Wang, Jiuyi; Fang, Xiaomin; Appel, Erwin; Song, Chunhui
通讯作者	Wang, JY (通讯作者)
发表日期	2012
ISSN	1527-1404
起始页码	933
结束页码	952
卷号	82 期号:11-12
英文摘要	The Pliocene-Pleistocene sedimentologic evolution of the western Qaidam Basin at the NE Tibetan Plateau was studied on the nearly thousand-meter-deep drill core SG-1 (spanning ca. 2.8-0.1 Ma), recovered from the Chahansilatu sub-depression with an average recovery rate of 95%. Lithofacies variation records the regional climatic change in relation to Asian drying and Tibetan Plateau uplift. Sedimentary textures and structures demonstrate a continuous slight coarsening and an increase of evaporites upward. We recognized five lithofacies: (1) gray-black laminated mudstone, (2) gray massive mudstone and siltstone, (3) bedded halite, (4) loose muddy halite, and (5) brownish-yellowish saliferous siltstone and mudstone, representing (1) semi-deep fresh to semi-brackish lake, (2) shallow brackish lake, (3) perennial saline lake, (4) playa saline lake, and (5) saline mudflat conditions, respectively. Variation of the lithofacies through the core demonstrates a clear trend of lake shrinkage since the late Pliocene and the final termination of the Chahansilatu paleolake. Accelerations of lake shrinkages are observed at ca. 2.5 Ma, 2.2 Ma, 1.6 Ma, 1.2 Ma, 0.9 Ma, 0.6 Ma, and 0.1 Ma. Our results suggest that the long-term stepwise drying of the Asian inland may have been forced by the change of the global ice volume.
关键词	GREEN RIVER FORMATION WILKINS PEAK MEMBER SALINE LAKES PALEOCLIMATE RECORD POTASH EVAPORITES DEATH-VALLEY GREAT PLAINS NEW-MEXICO SEDIMENTS SALT
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000314085400010
来源期刊	JOURNAL OF SEDIMENTARY RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258041
推荐引用方式 GB/T 7714	Wang, Jiuyi,Fang, Xiaomin,Appel, Erwin,et al. PLIOCENE-PLEISTOCENE CLIMATE CHANGE AT THE NE TIBETAN PLATEAU DEDUCED FROM LITHOFACIES VARIATION IN THE DRILL CORE SG-1, WESTERN QAIDAM BASIN, CHINA[J]. 中国科学院青藏高原研究所,2012,82(11-12).
APA	Wang, Jiuyi,Fang, Xiaomin,Appel, Erwin,&Song, Chunhui.(2012).PLIOCENE-PLEISTOCENE CLIMATE CHANGE AT THE NE TIBETAN PLATEAU DEDUCED FROM LITHOFACIES VARIATION IN THE DRILL CORE SG-1, WESTERN QAIDAM BASIN, CHINA.JOURNAL OF SEDIMENTARY RESEARCH,82(11-12).
MLA	Wang, Jiuyi,et al."PLIOCENE-PLEISTOCENE CLIMATE CHANGE AT THE NE TIBETAN PLATEAU DEDUCED FROM LITHOFACIES VARIATION IN THE DRILL CORE SG-1, WESTERN QAIDAM BASIN, CHINA".JOURNAL OF SEDIMENTARY RESEARCH 82.11-12(2012).