DOI: 10.1016/j.gloplacha.2015.02.002
论文题名: Evidence of late early Miocene aridification intensification in the Xining Basin caused by the northeastern Tibetan Plateau uplift
作者: Zhang C. ; Xiao G. ; Guo Z. ; Wu H. ; Hao Q.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 128 起始页码: 31
结束页码: 46
语种: 英语
英文关键词: Aridification
; Clay minerals
; Early Miocene
; Inner Asia
; Tibetan Plateau uplift
Scopus关键词: Clay minerals
; Geochemistry
; Iodine
; Minerals
; Sedimentology
; Underwater mineralogy
; Weathering
; Aridification
; Comprehensive comparisons
; Early Miocene
; Global climate changes
; Inner Asia
; Northeastern tibetan plateaux
; Tibetan Plateau
; Warm and humid climates
; Climate change
; arid environment
; aridification
; chemical weathering
; chlorite
; climate conditions
; dolomite
; global change
; mineralogy
; Miocene
; tectonic evolution
; uplift
; China
; Qinghai
; Qinghai-Xizang Plateau
; Xining Basin
英文摘要: Few early Miocene terrestrial climate records exist from the Asian interior and as a result the evolution of Central Asian aridification and the driving forces behind it remain unclear. Here we report sedimentary, mineralogy and geochemical proxies from an early Miocene sedimentary sequence (ca. 22.1 to 16.5. Ma) from Xining Basin on the northeastern side of the Tibetan Plateau. Multiple proxies indicate a change of sedimentary facies of a distal alluvial fan from subfluvial to subatmospheric under a dominantly arid climate coupled with a clear two-stage climate change. During ~. 22.1-19.7. Ma (Unit I), the enrichment of I/S (irregular mixed-layers of illite and smectite) content, high values of a*/L* (redness/lightness), and stronger degree of chemical weathering suggest relatively warm and humid climate conditions during a generally arid climate. During 19.7-16.5. Ma (Unit II), the increase of chlorite and dolomite content, the upward decrease of a*/L*, and weaker degree of chemical weathering than Unit I suggest gradually increasing aridity since ca. 19.7. Ma. Comprehensive comparisons among records from central western China demonstrate that the aridification since ca. 19.7. Ma is widespread in northeastern part of the Tibetan Plateau. The climate changes in inner Asia are different to that of global-scale changes, which indicates that global climate changes and the retreat of the Para-Tethys Sea possibly had little influences on this region. The episodic, but persistent tectonic uplift of the north and northeastern Tibetan Plateau during the early Miocene likely played a key role in the aridification of the Xining Basin. © 2015 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923329937&doi=10.1016%2fj.gloplacha.2015.02.002&partnerID=40&md5=86e69f47d0fbe0a420073a4288677cef
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11537
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zhang C.,Xiao G.,Guo Z.,et al. Evidence of late early Miocene aridification intensification in the Xining Basin caused by the northeastern Tibetan Plateau uplift[J]. Global and Planetary Change,2015-01-01,128.