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Lower-altitude of the Himalayas before the mid-Pliocene as constrained by hydrological and thermal conditions

文献类型：期刊论文

作者Chen, Chihao2,3,4; Bai, Yan2,3; Fang, Xiaomin2,3,4; Xu, Qiang5,6; Zhang, Tao2,3; Deng, Tao1,4,7; He, Jiankun2,3; Chen, Qinghu2,3,4
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2020-09-01
卷号545期号:1页码:11
关键词paleoelevation paleotemperature GDGTs hydrogen isotope of leaf wax n-alkanes Late Miocene to mid-Pliocene Gyirong Basin
ISSN号0012-821X
DOI10.1016/j.epsl.2020.116422
英文摘要Contradictory paleoaltitudinal histories of the Himalayas arrived at using isotopic paleoaltimeters and ecological evidences have constrained our further exploration of the geodynamic mechanisms driving the India-Eurasia collision and the resultant interaction between tectonic uplift and climate change. In this study, based on evidence derived from glycerol dialkyl glycerol tetraethers (GDGTs), the hydrogen isotopes of leaf wax n-alkanes (delta H-2(alk)), we estimated the paleoaltitude of the Gyirong Basin (GB), central Himalayas, for the 7.0 similar to 3.2 Ma period. The paleoaltitudinal reconstruction based on delta H-2(alk) values (similar to 6.3km above sea level (asl)) was consistent with that of the revised delta O-18(c) values (similar to 5.6 km asl), and higher than the present-day altitude (similar to 4 km asl). The reconstructed paleotemperatures based on brGDGTs (14.2 +/- 4.5 degrees C for the lake surface; 7.5 +/- 3.3 degrees C for terrestrial organic matter source areas) were consistent with the ecological evidences, indicating a low-altitude paleoenvironment. This proves that a systemic bias exists between the isotopic paleoaltimeters and the ecological evidence, rather than a problem with specific indicators. The reconstructed paleoaltitudinal differences between the delta H-2(alk) and delta O-18(c) values are similar to those of brGDGT reconstructions, seemingly representing the paleoaltitudinal differences between the source areas of terrestrial organic matter inputs and the lake surface, and suggesting that the isotopic palaeoaltimeters do not specifically record the higher-altitude parts of the basinal topography. Further paleoenvironmental analysis indicated that the warmer and wetter environment present during the Late Miocene to Mid-Pliocene would, on the face of it, be better suited to the application of brGDGT paleothermometers, and this in turn would potentially lead to a systemic overestimation by isotopic paleoaltimeters. We therefore adopted the paleoaltitudinal reconstructions which used brGDGTs and concluded that the lake surface of the GB during the Late Miocene to Mid-Pliocene was 2.5 +/- 0.8 km asl, and that the surrounding mountains exceeded 3.6 km asl in height, implying that the central Himalayas underwent a rapid uplift of similar to 1.5 km after the Mid-Pliocene. (C) 2020 Elsevier B.V. All rights reserved.
WOS关键词ISOTOPE-BASED PALEOALTIMETRY ; TIBETAN PLATEAU ; ENVIRONMENTAL-CHANGES ; SIGNIFICANT UPLIFT ; GYIRONG BASIN ; MIOCENE ; ELEVATION ; EVOLUTION ; GEOCHEMISTRY ; TETRAETHERS
资助项目Second Tibetan Plateau Scientific Expedition and Research (STEP) Program[2019QZKK0707] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20070201] ; Basic Science Center for Tibetan Plateau Earth System [CTPES][41988101-01] ; National Science Foundation of China [NSFC][41571014] ; National Science Foundation of China [NSFC][41871023]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000549183200017
出版者ELSEVIER
源URL[http://119.78.100.205/handle/311034/17791]  
专题古脊椎动物与古人类研究所_图书馆1
通讯作者Bai, Yan
作者单位1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.CNPC, Div Key Lab Carbonate Reservoirs, Chengdu 610500, Peoples R China
6.Southwest Petr Univ, Chengdu 610500, Peoples R China
7.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Chihao,Bai, Yan,Fang, Xiaomin,et al. Lower-altitude of the Himalayas before the mid-Pliocene as constrained by hydrological and thermal conditions[J]. EARTH AND PLANETARY SCIENCE LETTERS,2020,545(1):11.
APA Chen, Chihao.,Bai, Yan.,Fang, Xiaomin.,Xu, Qiang.,Zhang, Tao.,...&Chen, Qinghu.(2020).Lower-altitude of the Himalayas before the mid-Pliocene as constrained by hydrological and thermal conditions.EARTH AND PLANETARY SCIENCE LETTERS,545(1),11.
MLA Chen, Chihao,et al."Lower-altitude of the Himalayas before the mid-Pliocene as constrained by hydrological and thermal conditions".EARTH AND PLANETARY SCIENCE LETTERS 545.1(2020):11.

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