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DOI10.1016/j.gr.2023.02.012
Deciphering source-to-sink history from a solute perspective: A Sr isotope approach in the Qaidam Basin, NE Tibet
Liu, Yudong; Yang, Yibo; Yang, Rongsheng; Galy, Albert; Jin, Zhangdong; Fang, Xiaomin; Song, Bowen
发表日期2023
ISSN1342-937X
EISSN1878-0571
起始页码76
结束页码91
卷号118
英文摘要Sediment source-to-sink history is pivotal to investigating the evolution of ancient sedimentary basin. Previous study focuses mostly on reconstruction of various components of siliciclastic sedimentary sys-tems from initial source areas through the dispersal system to deposition areas, but less on the dissolved load that displays distinct transport and deposition dynamics. Here we take the Qaidam Basin (NE Tibet) as a case to provide a solute perspective for deciphering the source-to-sink history of an intracontinental basin. The modern observations exhibit a remarkable contrast of the solute Sr isotopic regime with the northern sources (the Qilian Shan) with high 87Sr/86Sr ratios and the southern sources with low 87Sr/86Sr ratios. The paleowater solute 87Sr/86Sr ratios in the northern basin fluctuate between 0.711 and 0.715 since ti 54 Ma. Most of the interval remains a higher 87Sr/86Sr ratio of ti 0.713, indicating that the solute Sr was supplied solely by the Qilian Shan. But two periods of low 87Sr/86Sr ratio (0.711-0.712) at ti 44.5 -ti32 Ma and after ti 16 Ma suggest that there may be two paleo-megalakes connecting the northern and southern sources, and the solute with low 87Sr/86Sr ratio from the southern sources can thus approach the northern basin via lake water mixing. The two low 87Sr/86Sr paleo-megalakes developed at the northwest of the basin at ti 44.5 -ti32 Ma and at southeast of the basin after ti 16 Ma, suggesting a southeastward migration of the basin depocenter that was mainly caused by tectonic uplift with a sub-ordinate impact of climate-induced lake expansion. Our results show a more complex and dynamic solute transport routing history in a large basin than that indicated by coarse clastic provenance studies, and suggest that such a solute Sr approach can be useful to trace sediment routing linked to denudation of high-grade metamorphic rocks and hydrological connections under drainage reorganization.(c) 2023 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
关键词solute Sr isotopeQaidam BasinPaleolakeProvenanceQilian Shan
英文关键词ALTYN-TAGH FAULT; APATITE FISSION-TRACK; CENOZOIC COOLING HISTORY; NORTH QILIAN SHAN; TECTONIC EVOLUTION; HEXI CORRIDOR; NORTHEASTERN MARGIN; INTENSIFIED ARIDITY; PROVENANCE ANALYSIS; GEOLOGIC EVOLUTION
WOS研究方向Geosciences, Multidisciplinary
WOS记录号WOS:000953148800001
来源期刊GONDWANA 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/283293
作者单位Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); Universite de Lorraine; Chinese Academy of Sciences; Institute of Earth Environment, CAS; China University of Geosciences - Wuhan
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Liu, Yudong,Yang, Yibo,Yang, Rongsheng,et al. Deciphering source-to-sink history from a solute perspective: A Sr isotope approach in the Qaidam Basin, NE Tibet[J]. 中国科学院青藏高原研究所,2023,118.
APA Liu, Yudong.,Yang, Yibo.,Yang, Rongsheng.,Galy, Albert.,Jin, Zhangdong.,...&Song, Bowen.(2023).Deciphering source-to-sink history from a solute perspective: A Sr isotope approach in the Qaidam Basin, NE Tibet.GONDWANA RESEARCH,118.
MLA Liu, Yudong,et al."Deciphering source-to-sink history from a solute perspective: A Sr isotope approach in the Qaidam Basin, NE Tibet".GONDWANA RESEARCH 118(2023).
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