The last glaciation in the headwater area of the Xiaokelanhe River, Chinese Altai: Evidence from Be-10 exposure-ages

doi:10.1016/j.quageo.2020.101054

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	The last glaciation in the headwater area of the Xiaokelanhe River, Chinese Altai: Evidence from Be-10 exposure-ages
	Dong, Guocheng 1,2,3,4,5; Zhou, Weijian 1,3,4,5; Fu, Yunchong1,3,4,5 ; Zhang, Li 1,3,4,5; Zhao, Guoqing 1,3,4,5; Li, Ming 1,3,4,5
通讯作者	Dong, Guocheng(donggc@ieecas.cn)
	2020-03-01
发表期刊	QUATERNARY GEOCHRONOLOGY
ISSN	1871-1014
卷号	56 页码:11
摘要	The timing and extent of the last glaciation in the Altai Mountains are key to understanding climate change in this critical region. However, robust glacial chronologies are sparse across the Altai Mountains, especially in the Chinese Altai, impeding the correlation of glacial events and examination of the possible climate forcing mechanisms. Here, we report twenty new Be-10 exposure-ages obtained from two moraines in the headwater area of the Xiaokelanhe River, Chinese Altai. The inner latero-frontal moraine yields exposure-ages ranging from 16.60 +/- 1.00 to 20.41 +/- 1.15 ka (n = 5), reflecting a limited advance during the global Last Glacial Maximum (LGM). The morpho-stratigraphically older moraine remnants have exposure-ages of 14.36 +/- 0.94-38.98 +/- 2.23 ka (n = 15). The tentatively determined moraine age of 34.10 +/- 4.99 ka suggests that the local LGM in the Xiaokelanhe River likely occurred during Marine Isotope Stage (MIS) 3 or earlier. From a compilation of the 20 new, and 79 previously published exposure-ages, we observe at least three distinct glacial events during the last glacial, with the local LGM occurring prior to MIS 2. A comparison between the timing of glacial activities and climate proxies suggests a potential combination of summer solar insolation, North Atlantic climate oscillations, and atmospheric CO2 levels, as triggers for glacial movements during the last glacial cycle. Precipitation delivered by the mid-latitude westerlies may have also contributed to glacial advances during MIS 3. These correlations remain tentative however, due to limited chronological control.
关键词	Last glaciation Be-10 surface exposure dating Xiaokelanhe river basin Altai mountains
DOI	10.1016/j.quageo.2020.101054
关键词[WOS]	LATE PLEISTOCENE GLACIATIONS ; SURFACE EXPOSURE ; TIAN-SHAN ; QUATERNARY GLACIATIONS ; MIDLATITUDE WESTERLIES ; TIBETAN PLATEAU ; SUMMER MONSOON ; NORTH-ATLANTIC ; MOUNT JAGGANG ; LABRADOR SEA
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41601010] ; National Natural Science Foundation of China[41602195] ; State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences[SKLCS-OP-2018-02]
WOS研究方向	Physical Geography ; Geology
项目资助者	National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000518869400008
出版者	ELSEVIER SCI LTD
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12666
专题	加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Dong, Guocheng
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Chinese Acad Sci, Northwset Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China 3.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 4.Xian AMS Ctr IEECAS, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian 710061, Peoples R China 5.Xi An Jiao Tong Univ, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Dong, Guocheng,Zhou, Weijian,Fu, Yunchong,et al. The last glaciation in the headwater area of the Xiaokelanhe River, Chinese Altai: Evidence from Be-10 exposure-ages[J]. QUATERNARY GEOCHRONOLOGY,2020,56:11.
APA	Dong, Guocheng,Zhou, Weijian,Fu, Yunchong,Zhang, Li,Zhao, Guoqing,&Li, Ming.(2020).The last glaciation in the headwater area of the Xiaokelanhe River, Chinese Altai: Evidence from Be-10 exposure-ages.QUATERNARY GEOCHRONOLOGY,56,11.
MLA	Dong, Guocheng,et al."The last glaciation in the headwater area of the Xiaokelanhe River, Chinese Altai: Evidence from Be-10 exposure-ages".QUATERNARY GEOCHRONOLOGY 56(2020):11.