干旱区生态环境知识资源中心(Arid): 新疆湖泊岩芯记录的末次间冰期以来气候变化初步研究

Arid

	新疆湖泊岩芯记录的末次间冰期以来气候变化初步研究
其他题名	A PRELIMINARY STUDY ON THE CLIMATE CHANGE SINCE THE LAST INTERGLACIATION BASED ON LAKE SEDIMENTS FROM XINJIANG,NORTHWEST CHINA
	段阜涛 1; 安成邦 1; 赵永涛 2; 张晓楠 3; 周爱锋 1; 黄小忠 1; 李国强 1; 夏敦胜 1; 陈发虎4
来源期刊	第四纪研究
ISSN	1001-7410
出版年	2018
卷号	38 期号:5 页码:1156-1165
中文摘要	针对目前中亚西风影响区湖泊记录研究中的难点和关键科学问题,我们选择新疆的乌伦古湖、博斯腾湖、巴里坤湖钻取了湖泊岩芯,报道它们初步的研究成果。年代测定采用了AMS 14C、光释光技术,并结合古地磁的研究,初步建立了湖泊岩芯的年代框架。巴里坤湖具有末次间冰期以来连续的沉积,是研究气候环境变化的理想载体;博斯腾湖和乌伦古湖都曾经出现过沉积间断,不利于进行高分辨率的气候环境变化重建。从现有的结果来看,末次间冰期气候较为湿润,MIS 3阶段气候的湿润程度降低,LGM时期气候干旱,全新世时期湖泊普遍发育。
英文摘要	In the past 150 thousand years, the earth experienced a complete glacial-interglacial cycle encompassing some special periods, such as the Marine Isotope Stage (MIS) 3 and Last Glacial Maximum (LGM). However, there have, to date, been few studies covering the full glacial-interglacial cycle, especially for the lake studies. Here we present a preliminary study from three inland lakes in Xinjiang, Northwest China, including Wulungu Lake, Bosten Lake, and Balikun Lake. A 24.11 m drilling core(WLG11E) was collected form the center of Wulungu Lake(47°14.4’N,87°13.1’E;479 m a.s.l.) in February 2011. The present study focuses on the top 9 m of the core. The age-depth model of the core was established based on seven AMS 14C dates measured by Beta Analytic Inc. USA and the Key Laboratory of Western China’s Environmental Systems(Ministry of Education),Lanzhou University. A 51.6m long sediment core (BST12B)was taken from the center of Bosten Lake(42°0.7’N,87°9.3’E; 1051 m a.s.l.)in 2012. In this study, we focus on the depth interval of 0 ~20 m to infer climate changes. And twelve luminescence dating samples were used to establish the chronology based on multi-grain quartz OSL and K-feldspar post-IRIRSL(pIRIR290) dating. A 62.53 m long sediment core(BLK11 A) was retrieved from the center of Balikun Lake(43°36’~43°45’N , 92°42’~92°54’E; 1575 m a.s.l.) in June 2011. In this paper, we focus on the top 45 m of the core. The chronology framework of the core was established based on fourteen AMS 14C dates measured by Beta Analytic Inc. USA, one OSL date by the Key Laboratory of Western China’s Environmental Systems (Ministry of Education),Lanzhou University and existed palaeomagnetic analysis. In this paper, we use lithology characteristics and grain-size data from these three lakes mentioned above to infer climate changes of Xinjiang since the Last Interglaciation. The results show that (1) Balikun Lake has continuous Late Pleistocene deposits spanning the last glacial-interglacial interval, thus is beneficial for the reconstruction of the past climate change in arid areas of China ; while the other two lakes are characteristic of haitus due to erosion. (2) After comparisons with these three records, we get the conclusion that : an optimum climate prevailed the most areas of Western China during MIS 5,and this humid condition made clay-dominated sedimentation in most lakes ; a continuous and gradually drying climate was found during MIS 3,leading to an increase in coarse particles in Balikun and Wulungu lakes. Hiatus occurred during LGM,accompanying with elevated grain size that indicated a degraded environment. The Holocene deposits were featured by clay and/or siltyclay, which suggested a gradual trend towards a wetter environment with high lake level.
中文关键词	新疆 ; 西风区 ; 湖泊 ; 气候记录 ; 末次间冰期
英文关键词	Xinjiang western wind regions lake climate change the last interglaciation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6340387
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237494
作者单位	1.兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国; 2.兰州大学资源环境学院;;中国科学院西北生态环境资源研究院, 西部环境教育部重点实验室;;, 兰州;;兰州, 甘肃;;甘肃 730000;;730000, 中国; 3.兰州大学资源环境学院;;云南大学资源环境与地球科学学院, 西部环境教育部重点实验室;;, 兰州;;昆明, 甘肃;;云南 730000;;650504, 中国; 4.兰州大学资源环境学院;;中国科学院青藏高原研究所, 西部环境教育部重点实验室;;, 兰州;;, 甘肃;;北京 730000;;100101, 中国
推荐引用方式 GB/T 7714	段阜涛,安成邦,赵永涛,等. 新疆湖泊岩芯记录的末次间冰期以来气候变化初步研究[J]. 兰州大学,2018,38(5):1156-1165.
APA	段阜涛.,安成邦.,赵永涛.,张晓楠.,周爱锋.,...&陈发虎.(2018).新疆湖泊岩芯记录的末次间冰期以来气候变化初步研究.第四纪研究,38(5),1156-1165.
MLA	段阜涛,et al."新疆湖泊岩芯记录的末次间冰期以来气候变化初步研究".第四纪研究 38.5(2018):1156-1165.