干旱区生态环境知识资源中心(Arid): 克里雅河下游沉积物的光释光年龄与晚更新世末以来沙漠的形成

Arid

	克里雅河下游沉积物的光释光年龄与晚更新世末以来沙漠的形成
其他题名	OSL chronology reveals Late Pleistocene floods and the impact on landform evolution at the lower reaches of the Keriya River in the Taklamakan Desert
	张峰; 王姣; 马丽; 迪丽拜尔·吐尔孙
来源期刊	地理学报
ISSN	0375-5444
出版年	2021
卷号	76 期号:9 页码:2240-2252
中文摘要	有关塔克拉玛干沙漠演化的年代学数据尚少,本文在地貌认知较少的克里雅河下游沙漠深处的圆沙和喀拉墩一带16处剖面获取了18件河流沉积光释光(OSL)年龄。新测得的年龄数据分布于3.444.1 ka。全新世样品多分布于圆沙与喀拉墩干三角洲及其之间的地区,年龄集中在11 ka、89 ka、56.5 ka、4.6 ka与3.43.7 ka。深海氧同位素3阶段(MIS3)样品位置在克里雅河与和田河之间,分布在约3847 ka前后。末次冰期冰盛期(LGM)末样品分布在通往圆沙古河道的西侧,年龄在14.5 ka前后。根据沉积物样品及年代学数据认为:克里雅河下游曾在MIS3阶段末、LGM末与全新世多次发生洪泛;数次的洪泛事件对克里雅河下游地貌发育产生重要影响;克里雅河下游干三角洲及现代河流西侧的流动沙丘主要形成于全新世,与前人发育于汉唐以来的观点不完全一致。克里雅河下游河流沉积发生时间与塔里木盆地周缘山脉冰进冰消有一定对应,暗示气候变化可能间接影响着塔克拉玛干沙漠沙丘的发育。
英文摘要	Climate change impacts on the relationship between fluvial processes and dunes landform evolution have been a research topic. However, the chronology data used to examine such relationship are deficient. The Keriya River has a glacial origin in the Kunlun Mountains at the south margin of the Tarim Basin. The river flows into the Taklamakan Desert, the second largest shifting dunes desert in the world. The dry channels and shifting dunes in the area provide an ideal opportunity to understand fluvial and eolian landform evolution processes and their relationship with climate change. We investigated this area from 2008-2011, and obtained 18 fluvial sediment samples from 16 sections for optically stimulated luminescence (OSL) dating. Results show that the ages are ranged from 3.4-44.1 ka. Most (13) samples were from the Holocene, around 11 ka, 8-9 ka, 5-6.5 ka, 4.6 ka and 3.4-3.7 ka respectively. which were distributed along ancient river channels around Yuansha and Karadun. Two samples close to the Hotan River (38-47 ka) fall in the Marine Isotope Stages 3 (MIS3). Three samples (of one section) were located near ancient channels flowing towards the Yuansha Site aged around 14.5 ka, the Last Glacial Maximum (LGM). The sediment samples and OSL ages of this work suggest that the Keriya River was flooded in the Holocene, the LGM and the MIS3 stage. Fluvial sediment provided source material for dunes and fluvial processes impacted landform evolution at the lower reaches of the Keriya River. Our results suggest that most dunes covered on fluvial sediments at the lower reaches and west of the Keriya River developed since the Holocene. This differs from previous works suggesting that they developed "since the Han and Tang dynasties". The OSL ages of fluvial sediments were consistent with the reported deglaciation (after glacial advance) ages in alpine mountains surrounding the Tarim Basin. This suggests that climate fluctuation might have impacted the occurrence of floods and the formation of dunes in the Taklamakan Desert.
中文关键词	塔克拉玛干沙漠 ; 洪泛 ; 沙丘 ; 全新世 ; 冰消
英文关键词	MIS3 LGM Taklamakan Desert floods inundation dunes MIS3 LGM Holocene glacial ablation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7061192
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377557
作者单位	张峰, 新疆大学, 教育部绿洲生态重点实验室, 乌鲁木齐, 新疆 830046, 中国.; 王姣, 新疆大学, 教育部绿洲生态重点实验室, 乌鲁木齐, 新疆 830046, 中国.; 马丽, 新疆大学, 教育部绿洲生态重点实验室, 乌鲁木齐, 新疆 830046, 中国.; 迪丽拜尔·吐尔孙, 新疆大学, 教育部绿洲生态重点实验室, 乌鲁木齐, 新疆 830046, 中国.
推荐引用方式 GB/T 7714	张峰,王姣,马丽,等. 克里雅河下游沉积物的光释光年龄与晚更新世末以来沙漠的形成[J],2021,76(9):2240-2252.
APA	张峰,王姣,马丽,&迪丽拜尔·吐尔孙.(2021).克里雅河下游沉积物的光释光年龄与晚更新世末以来沙漠的形成.地理学报,76(9),2240-2252.
MLA	张峰,et al."克里雅河下游沉积物的光释光年龄与晚更新世末以来沙漠的形成".地理学报 76.9(2021):2240-2252.