干旱区生态环境知识资源中心(Arid): 新疆乌伦古湖粘土矿物古气候环境意义

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	新疆乌伦古湖粘土矿物古气候环境意义
其他题名	Paleoclimatic significance of the clay minerals from Ulungur Lake sediments, Xingjiang,China
	钱鹏; 蒋庆丰; 任雪梅
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2014
卷号	28 期号:4 页码:108-113
中文摘要	粘土矿物特征是古气候研究的重要指标之一。通过研究乌伦古湖中粘土矿物类型、组合特征,探讨古环境变迁。研究可知:乌伦古湖沉积物中粘土矿物含伊利石、高岭石、蒙脱石和绿泥石,且以伊利石为主,指示了总体干燥的气候环境。其中,16.2cal.kaBP-5.5cal.kaBP阶段,伊利石含量相对较高,高岭石含量、Kubler指数值相对较低,反映此时冷干气候环境。5.5cal.kaBP-1.6 cal.kaBP阶段,高岭石含量增大;伊利石含量、Hw指数值均相对减小,Kubler指数值相对增加指示相对暖湿的气候环境;1.6cal.kaBP至今,伊利石、Hw指数值相对较高,高岭石含量、Kubler指数值相对较低,蒙皂石含量较高指示凉干气候环境。该研究对探讨西风控制区全新世气候环境变迁以及气候驱动机制具有一定参考价值。
英文摘要	Clay mineral has an remarkable advantage for paleoclimatic indication,and it is the effective method being used in paleoclimatic research.In this study,the classicification and combination characteristics of clay minerals from Ulungur Lake sediments were used to study the environmental changing in Ulungur area.AMS 14C ages were used to reconstruct the changing of Westerlies and paleoclimate.Ulungur Lake sediments contain four types of clay minerals,including illite,kaolinite,smectite,and chlorite.Among them,illite is the major mineral in sediments,which indicates arid climate in the Ulungur area.According to the clay mineral assemblages, the paleoclimate change in the Ulungur area can be divided into 3 stages.The first stage ranged from 16.2 cal.kaBP to 5.5 cal.kaBP.The illite content and Hw exponent values are relative high,while the kaolinite content and Kubler exponent value are relative low,which indicates cold and dry climate condition.The second stage ranged from 5.5 cal.kaBP to 1.6 cal.kaBP.kaolinite content increases,which indicate the warm-moist climate at that time; decreasing illite content and Hw exponent value and increasing Kubler reflect moist environment with strong weathering and eluviation.The third stage ranged from 1.6 cal.kaBP to present.The illite content and Hw exponent value increase,while the kaolinite content and Kubler exponent value decrease.These features suggest a dry climate with weak weathering and eluviation.In addition, the higher smectite content shows the low temperature.
中文关键词	粘土矿物 ; 古气候 ; 乌伦古湖 ; 新疆
英文关键词	clay mineral Paleoclimate Ulungur Lake Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5114126
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231213
作者单位	南通大学地理科学学院, 南通, 江苏 226007, 中国
推荐引用方式 GB/T 7714	钱鹏,蒋庆丰,任雪梅. 新疆乌伦古湖粘土矿物古气候环境意义[J],2014,28(4):108-113.
APA	钱鹏,蒋庆丰,&任雪梅.(2014).新疆乌伦古湖粘土矿物古气候环境意义.干旱区资源与环境,28(4),108-113.
MLA	钱鹏,et al."新疆乌伦古湖粘土矿物古气候环境意义".干旱区资源与环境 28.4(2014):108-113.