Uplift-driven climate change at 12 Ma: a long delta O-18 record from the NE margin of the Tibetan plateau

doi:10.1016/S0012-821X(03)00383-2

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	Uplift-driven climate change at 12 Ma: a long delta O-18 record from the NE margin of the Tibetan plateau
	Dettman, DL; Fang, XM; Garzione, CN; Li, JJ
	2003-09-10
发表期刊	EARTH AND PLANETARY SCIENCE LETTERS
卷号	214 期号:1-2 页码:267-277
文章类型	Article
摘要	Carbonates from fluvial and lacustrine sediments were sampled from multiple measured sections in the Linxia basin of western China. Based on textural and mineralogical evidence, lacustrine carbonates are primary precipitates from lake water. A 29 million year record of the oxygen isotope composition of meteoric water is inferred from the delta(18)O values of these carbonates. This inference is based on the most negative delta(18)O values in the lake carbonates, which represent lake waters that have experienced the least evaporative enrichment. Carbonate delta(18)O values, a proxy for rainfall delta(18)O, are similar to -10.5 parts per thousand throughout the interval of 29-12 Ma. At 12 Ma there is a shift to -9 parts per thousand, a value that remains into the Pliocene. This implies a major reorganization of atmospheric circulation patterns and a shift to more and conditions at the NE margin of the Tibetan plateau with the post-12 Ma system similar to that of today. The 12 Ma event may represent the time at which the Tibetan plateau achieves sufficient elevation to block the penetration of moisture from the Indian Ocean or south Pacific into western China. The period of greatest aridity is from 9.6 to 8.2 Ma, a time interval which agrees well with other climate records. (C) 2003 Elsevier B.V. All rights reserved.
关键词	Tibetan plateau uplift oxygen isotopes lacustrine miocene
学科领域	Geochemistry & Geophysics
DOI	10.1016/S0012-821X(03)00383-2
关键词[WOS]	STABLE-ISOTOPE COMPOSITION ; ASIAN MONSOON ; MYR AGO ; OXYGEN ; NEPAL ; MIOCENE ; CARBON ; CHINA ; BASIN ; MAGNETOSTRATIGRAPHY
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000185325400019
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：228[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/11845
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Dettman, DL,Fang, XM,Garzione, CN,et al. Uplift-driven climate change at 12 Ma: a long delta O-18 record from the NE margin of the Tibetan plateau[J]. EARTH AND PLANETARY SCIENCE LETTERS,2003,214(1-2):267-277.
APA	Dettman, DL,Fang, XM,Garzione, CN,&Li, JJ.(2003).Uplift-driven climate change at 12 Ma: a long delta O-18 record from the NE margin of the Tibetan plateau.EARTH AND PLANETARY SCIENCE LETTERS,214(1-2),267-277.
MLA	Dettman, DL,et al."Uplift-driven climate change at 12 Ma: a long delta O-18 record from the NE margin of the Tibetan plateau".EARTH AND PLANETARY SCIENCE LETTERS 214.1-2(2003):267-277.