Evaluation of leaf wax delta D and soil brGDGTs as tools for paleoaltimetry on the southeastern Tibetan Plateau

doi:10.1016/j.chemgeo.2019.05.005

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	Evaluation of leaf wax delta D and soil brGDGTs as tools for paleoaltimetry on the southeastern Tibetan Plateau
	Feng, Xiaoping 1,2,3; D'Andrea, William J.3; Zhao, Cheng 1,4; Xin, Shouzhen 1,2; Zhang, Can 1,2; Liu, Weiguo 4,5
通讯作者	Zhao, Cheng(czhao@niglas.ac.cn)
	2019-09-30
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	523 页码:95-106
摘要	The orogenic history of the Tibetan Plateau (TP) and surrounding mountain ranges continues to be a major source of disagreement among geologists, particularly concerning the uplift models for the Cenozoic evolution of the TP and estimates for when the highest and largest plateau on Earth reached its current elevation. Quantitative reconstructions of past elevation from geologic samples are necessary to document the uplift history of TP and examine the interactions between tectonic-relief and climate over geological time-scales. Several studies establishing lipid biomarker-based paleoaltimetry based on leaf wax delta D values and brGDGTs have been reported in recent years for the TP and surrounding regions, but have yet to be synthesized into a regional framework for paleoelevation determination and uncertainty analysis. Here we report new leaf wax delta D and brGDGTs data developed from surface soil samples along an elevation transect spanning similar to 1250-3900 m.a.s.l in the Hengduan Mountains on the southeastern edge of the TP. We find that the abundance-weighted mean leaf wax delta D (n-C-27, n-C-29 and n-C-31) values (delta D-wa(s)) lapse rates determined for the Hengduan Mountains and for five other nearby study locations are statistically indistinguishable, and can be combined to provide a regional delta D(was )lapse rate of -1.97 +/- 0.04 parts per thousand (1 sigma)/100 m for use in regional paleoelevation studies across the southeastern TP. We also find a strong correlation (R-2 = 0.71) between brGDGTs and elevation-dependent mean annual air temperature, which contributes to a number of studies in the region that support the use of fossil brGDGTs as a paleoelevation proxy. Our results reveal that delta D(was )and brGDGTs for the Hengduan Mountains provide similar empirical uncertainty in paleoelevation reconstruction, with standard errors of elevation estimation (SE) of +/- 483 m (+/- 1 sigma) and +/- 394 m (+/- 1 sigma), respectively. We propose a paleoaltimetric approach that combines delta D-wa(s) and brGDGT data, in order to derive paleoelevation estimates with lower uncertainties. In the Hengduan Mountains data set, the approach yields a SE (+/- 286 m; +/- 1 sigma) that is 27-40% lower than when delta D-wa(s) values and brGDGTs are applied separately.
关键词	n-alkanes delta D-wa(s) brGDGTs Paleoelevation Southeastern Tibetan Plateau
DOI	10.1016/j.chemgeo.2019.05.005
关键词[WOS]	SEDIMENTARY N-ALKANES ; ISOTOPE-BASED PALEOALTIMETRY ; VS. ALTITUDE GRADIENTS ; D VALUES ; TERRESTRIAL PLANTS ; GDGT DISTRIBUTIONS ; LIPID DISTRIBUTION ; AFRICAN HYDROLOGY ; MEMBRANE-LIPIDS ; STABLE-ISOTOPES
收录类别	SCI ; SCI
语种	英语
资助项目	Program of Global Change and Mitigation[2016YFA0600502] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20090000] ; National Natural Science Foundation of China[41877293] ; National Natural Science Foundation of China[41472315] ; China Scholarship Council ; Vetlesen Foundation
WOS研究方向	Geochemistry & Geophysics
项目资助者	Program of Global Change and Mitigation ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Scholarship Council ; Vetlesen Foundation
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000480333200009
出版者	ELSEVIER
引用统计	被引频次：14[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/361006/13624
专题	加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Zhao, Cheng
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Columbia Univ, Lamont Doherty Earth Observ, 61 Route 9W, Palisades, NY 10964 USA 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Feng, Xiaoping,D'Andrea, William J.,Zhao, Cheng,et al. Evaluation of leaf wax delta D and soil brGDGTs as tools for paleoaltimetry on the southeastern Tibetan Plateau[J]. CHEMICAL GEOLOGY,2019,523:95-106.
APA	Feng, Xiaoping,D'Andrea, William J.,Zhao, Cheng,Xin, Shouzhen,Zhang, Can,&Liu, Weiguo.(2019).Evaluation of leaf wax delta D and soil brGDGTs as tools for paleoaltimetry on the southeastern Tibetan Plateau.CHEMICAL GEOLOGY,523,95-106.
MLA	Feng, Xiaoping,et al."Evaluation of leaf wax delta D and soil brGDGTs as tools for paleoaltimetry on the southeastern Tibetan Plateau".CHEMICAL GEOLOGY 523(2019):95-106.