DOI: 10.1016/j.quascirev.2014.05.009
Scopus记录号: 2-s2.0-84902274919
论文题名: Timing and extent of Quaternary glaciations in the Tianger Range, eastern Tian Shan, China, investigated using 10Be surface exposure dating
作者: Li Y. ; Liu G. ; Chen Y. ; Li Y. ; Harbor J. ; Stroeven A.P. ; Caffee M. ; Zhang M. ; Li C. ; Cui Z.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 98 起始页码: 7
结束页码: 23
语种: 英语
英文关键词: Central Asia
; Cosmogenic nuclides
; Glacial chronology
; Quaternary glaciations
; Tian Shan
Scopus关键词: Climate change
; Isotopes
; Landforms
; Central Asia
; Cosmogenic nuclides
; Glacial chronology
; Quaternary glaciations
; Tian Shan
; Glacial geology
; climate conditions
; dating method
; fossil record
; glaciation
; marine isotope stage
; paleoclimate
; Quaternary
; China
; Tien Shan
英文摘要: Reconstructing glacial chronologies with consistent methods is critical for efforts to examine the timing and pattern of past climate change. Cosmogenic 10Be surface exposure dating has been widely used to constrain the timing of glacial events on the Tibetan Plateau and in Central Asia. However, few such studies have been conducted in the Chinese Tian Shan and available 10Be ages from this region have only provided evidence for glacial events during the global Last Glacial Maximum (gLGM) and Lateglacial. Here, we present 45 10Be surface exposure ages from glacial landforms in the Ala and Daxi valleys, two formerly glaciated valleys draining the Tianger Range, eastern Tian Shan. Combined with previously published 10Be surface exposure ages from the Daxi Valley in the source area of the Urumqi River, the new ages record five major glacial events during Marine Oxygen Isotope Stages (MIS) 6 or older, 4, 3, 2, and 1 (during the Little Ice Age, LIA). Landforms from glacial events since MIS 2 are found on the northern slope of the Tianger Range (Daxi Valley), whereas evidence for the older glacial events is only preserved on its southern slope (Ala Valley). This disparity may be caused by different preservation- and micro-climatic conditions on the northern and southern slopes of this mountain range, due to differences in gradient and aspect. The LIA glacial advances are apparently the only Holocene glacial event recorded in this area. Earlier Holocene glacial events were probably so restricted in extent that they were destroyed by subsequent LIA advances. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60201
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geography, University of Tennessee, Knoxville, TN 37996, United States; College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States; Bolin Centre for Climate Research, Department of Physical Geography and Quaternary Geology, Stockholm University, S-106 91 Stockholm, Sweden; Department of Physics, Purdue Rare Isotope Measurement Laboratory, Purdue University, West Lafayette, IN 47907, United States
Recommended Citation:
Li Y.,Liu G.,Chen Y.,et al. Timing and extent of Quaternary glaciations in the Tianger Range, eastern Tian Shan, China, investigated using 10Be surface exposure dating[J]. Quaternary Science Reviews,2014-01-01,98