DOI: 10.1016/j.quascirev.2013.07.017
Scopus记录号: 2-s2.0-84883013405
论文题名: Magnetostratigraphic and radiometric constraints on salt formation in the Qaidam Basin, NE Tibetan Plateau
作者: Wang J. ; Fang X. ; Appel E. ; Zhang W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 78 起始页码: 53
结束页码: 64
语种: 英语
英文关键词: Magnetostratigraphy
; Pliocene-Quaternary
; Qaidam Basin
; Radiometric geochronology
; Salt formation
Scopus关键词: Magnetostratigraphy
; Ne tibetan plateaux
; Pliocene-Quaternary
; Qaidam basin
; Radiometric constraints
; Regional climate changes
; Salt accumulations
; Salt formation
; Climate change
; Geochronology
; Potash
; Radiometry
; Salt deposits
; Stratigraphy
; Salt tectonics
; arid environment
; basin evolution
; Cenozoic
; climate change
; deposition
; geoaccumulation
; geochronology
; geomorphology
; lake evolution
; magnetostratigraphy
; Pliocene
; regional climate
; salt
; China
; Qaidam Basin
; Qinghai
英文摘要: The Qaidam Basin is the largest Cenozoic intermontane basin within the northeast (NE) Tibetan Plateau. It contains large amounts of nonmarine evaporite deposits formed during the Pliocene-Quaternary. Even at present, extensive salt deposits dominated by halite and potash are formed by solar-driven concentration of brine water in the basin interior, making it the most important industrial base for potash exploitation in China. The formation of salt required an arid climatic, appropriate hydrological and tectonic setting through geologic times and will do so in the future. Studying the salt formation in the Qaidam Basin will enhance our understanding of processes driven by saline lake evolution, regional climate change, and tectonic movements, not only for the setting of the Tibetan Plateau. Reliable dating is crucial for assessing the time of salt formation in Qaidam Basin and the accumulation process, yet no comprehensive scientific studies have been reported on this important issue until now. In this paper, we critically review and compile magnetostratigraphic and radiometric studies of the salt-bearing strata within seven depressions of the basin. We find that the ages of salt formation are very different in these depressions: for the Dalangtan, Yiliping, Chahansilatu, and Kunteyi depressions, first salt deposits occurred at >3.90±0.02Ma, 2.88±0.04Ma, 2.24±0.01Ma and 1.18±0.02Ma, respectively. For the Mahai, Gasikule, and Qarhan, the ages of earliest salt formation are much younger i.e., 302±56ka, 608±38ka, and 54-24ka, respectively. However, the result from Mahai has to be considered with caution. The variability of ages suggests an older salt-forming stage in the center of the western basin and a younger salt accumulation period along the basin margin. In a regional view, previous results from stratigraphy, sedimentology, geomorphology, and tectonic history allow us to conclude that the salt formation in the Qaidam Basin was probably controlled by pulsed intrabasinal tectonic movements and the distribution and migration of paleo-rivers during the Pliocene-Quaternary. However, the climatic shift towards drier and colder conditions in the Asian interior during this time also promoted salt formation. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60509
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, ChineseAcademy of Sciences, Beijing 100101, China; School of Earth Sciences And Key Laboratory of Western China's Environmental Systems (MOE), Lanzhou University, Lanzhou 730000, China; Department of Geosciences, University Tübingen, Hölderlinstr. 12, 72074 Tübingen, Germany
Recommended Citation:
Wang J.,Fang X.,Appel E.,et al. Magnetostratigraphic and radiometric constraints on salt formation in the Qaidam Basin, NE Tibetan Plateau[J]. Quaternary Science Reviews,2013-01-01,78