干旱区生态环境知识资源中心(Arid): 腾格里沙漠南缘土门剖面末次冰消期层段粒度特征及其反映的古气候

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	腾格里沙漠南缘土门剖面末次冰消期层段粒度特征及其反映的古气候
其他题名	GRAIN-SIZE DISTRIBUTION ALONG THETUMEN SECTION OF SOUTHERN TENGGER DESERT,NORTHWESTERN CHINA AND ITS PALEOCLIMATIC IMPLICATIONS DURING THE LAST DEGLACIAL
	孟洁 1; 温小浩 1; 李保生 2; 牛东风 1; 赵占仑 1; 孙业凤 1; 杨庆江 1
来源期刊	海洋地质与第四纪地质
ISSN	0256-1492
出版年	2016
卷号	36 期号:1 页码:165-176
中文摘要	腾格里沙漠南缘土门剖面41LD-52L层段由3层黄土状亚砂土、5层砂黄土、2层湖湘和2层古土壤组成,其年代为14 930~11 640 aBP,相当于末次冰消期。分析结果表明,整个末次冰消期层段以粉砂含量占绝对优势,分布范围/平均值21.69%~79.47%/50.33%;砂含量次之,为3.97%~75.37%/38.17%;黏土含量最少,为2.34%~34.02%/11.50%。各不同粒级沉积物、Mz、sigma等在垂直方向上呈相反的镜像对称变化。该层段粒度(Mz)指示腾格里沙漠南缘末次冰消期经历了4个以东亚夏季风为主的暖湿气候(W1-W4)与4个冬季风为主的冷干气候(C1-C4),其中W2、W3和W4暖事件与格陵兰GRIP冰心记录的晚阿勒罗德(late Allerod)、早阿勒罗德和波令(Bolling)等暖事件对应;C1、C2和C3冷事件与新仙女木(Younger Dryas,YD)和阿勒罗德(Inter Allerod Cold Period,IACP)冷事件对应。同时,该指标指示的新仙女木冷期(12650~11640 aBP)与波令-阿勒鲁德暖期(14930~ 12650 aBP),可分别与格陵兰GRIP冰心氧同位素记录的新仙女木冷期、波令-阿勒鲁德暖期(B/A转换)在气候性质和相位上具有较好的对应关系。它们之间的良好的对比关系表明,腾格里沙漠南缘气候波动的驱动机制可能与格陵兰冰心代表的北半球高纬度热盐环流驱动机制密切相关。
英文摘要	The Tumen sequence(41LD-52L)at the southern edge of the Tengger Desert in the northwestern China covers the time span of 14930-11640 aBP synchronously with the last Deglacial.It consists of 3 layers of loess-like sandy loams,2 layers of sandy loess,2 layers of lacustrine facies,and 2 layers of paleosol. The results of grain-size analysis show that silty sands dominate the major proportion ranging from 21.69%upto 79.47% with an average of 50.33%;Sands comes the second with a distribution range of 3.97%~75.37% and an average of 38.17%;The lowest proportion is clay,ranging from 2.34% to 34.02% with an average of 11.50%.Symmetrical changes in grain-sizes,Mz andsigmaare observed in vertical direction,indicating that the climate in southern Tengger Desert during the last deglacial had significantly varied for at least 4 warm-cold fluctuations,including warm-humid phase W1-W4 and cold-dry phase C1- C4.The W2,W3 and W4,are corresponding to the late Allerod,early Allerod and Bolling in the GRIP ice core record,respectively,while the C1,C2 and C3 are corresponding to Younger Dryas(YD)and Inter Allerod Cold Period(IACP).In addition,the Yonger Dryas(12650-11640 aBP)and Bolling-Allerod warm period(BA)(14930-12650 aBP)indicated by grain sizes are corresponded well and in phase with oxygen isotope records(delta~(18)O)in GRIP cores,demonstrating that the driving force of such a change in southern Tengger desert is chiefly related to the thermohaline circulation in high nothern latitudes represented by Greenland ice core.
中文关键词	土门剖面 ; 粒度 ; 末次冰消期 ; 腾格里沙漠
英文关键词	Tengger Desert Tumen section grain sizes the last deglacial
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:5695286
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234462
作者单位	1.华南师范大学地理科学学院, 广州, 广东 510631, 中国; 2.华南师范大学地理科学学院, 黄土与第四纪地质国家重点实验室, 广州, 广东 510631, 中国
推荐引用方式 GB/T 7714	孟洁,温小浩,李保生,等. 腾格里沙漠南缘土门剖面末次冰消期层段粒度特征及其反映的古气候[J],2016,36(1):165-176.
APA	孟洁.,温小浩.,李保生.,牛东风.,赵占仑.,...&杨庆江.(2016).腾格里沙漠南缘土门剖面末次冰消期层段粒度特征及其反映的古气候.海洋地质与第四纪地质,36(1),165-176.
MLA	孟洁,et al."腾格里沙漠南缘土门剖面末次冰消期层段粒度特征及其反映的古气候".海洋地质与第四纪地质 36.1(2016):165-176.