气候变化领域集成服务门户(CCPortal): High and dry in central Tibet during the Late Oligocene

CCPortal

DOI	10.1016/j.epsl.2006.11.001
	High and dry in central Tibet during the Late Oligocene
	DeCelles, Peter G.; Quade, Jay; Kapp, Paul; Fan, Majie; Dettman, David L.; Ding, Lin
发表日期	2007
ISSN	0012-821X
EISSN	1385-013X
起始页码	389
结束页码	401
卷号	253 期号:3-4
英文摘要	The time at which the Tibetan Plateau rose to its present high elevation remains controversial, with estimates ranging from 40 Ma to more recent than 7 Ma. New stable isotope analyses of modem and accurately dated ancient paleosol carbonate in the Nima basin of central Tibet point to an and climate and high paleoclevation (4.5-5 km, comparable to today's setting) by 26 Ma. Oxygen isotope values of ancient (26 Ma) soil carbonate are both very negative and indistinguishable-after modest corrections for changes in global climate-from the lowest (least evaporated) oxygen isotope values of modem soil carbonates in the area. Substantial enrichments in oxygen-18 in paleolacustrine carbonates, as well as high carbon isotope values from paleosol carbonates, indicate considerable lake evaporation and low soil respiration rates, respectively, and both are consistent with the present arid climate of the Nima area. Blockage of tropical moisture by the Himalaya and perhaps the Gangdese Shan probably has contributed strongly to the aridity and very negative oxygen isotope values of soil carbonate and surface water in the Nima area since at least the Late Oligocene. The maintenance of high elevation since at least 26 Ma suggests that any flow of lower crust from beneath central Tibet must have been balanced by coeval northward insertion of Indian crust beneath the Plateau. (c) 2006 Elsevier B.V All rights reserved.
关键词	STABLE-ISOTOPE COMPOSITION SOUTHERN TIBET PLATEAU MIOCENE PALEOELEVATION PALEOALTIMETRY UPLIFT DELTA-O-18 ELEVATION BASIN
英文关键词	Tibet; paleoelevation; continental tectonics; carbon isotopes; oxygen isotopes
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000244384100007
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
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/257466
推荐引用方式 GB/T 7714	DeCelles, Peter G.,Quade, Jay,Kapp, Paul,et al. High and dry in central Tibet during the Late Oligocene[J]. 中国科学院青藏高原研究所,2007,253(3-4).
APA	DeCelles, Peter G.,Quade, Jay,Kapp, Paul,Fan, Majie,Dettman, David L.,&Ding, Lin.(2007).High and dry in central Tibet during the Late Oligocene.EARTH AND PLANETARY SCIENCE LETTERS,253(3-4).
MLA	DeCelles, Peter G.,et al."High and dry in central Tibet during the Late Oligocene".EARTH AND PLANETARY SCIENCE LETTERS 253.3-4(2007).