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主元素特征及其记录的古气候环境

Arid

	腾格里沙漠南缘土门剖面末次冰消期层段主元素特征及其记录的古气候环境
其他题名	The characteristics of major elemental oxides and paleoclimate changes recorded by the major elements of the last deglaciation segment of the Tumen section on the southern edge of the Tengger Desert
	赵占仑 1; 温小浩 1; 李保生 2; 牛东风 1; 孟洁 1; 孙业凤 1; 杨庆江 1
来源期刊	地球化学
ISSN	0379-1726
出版年	2016
卷号	45 期号:6 页码:623-633
中文摘要	腾格里沙漠南缘土门剖面末次冰消期层段由3层沙丘砂、2层湖相沉积、2层古土壤和5层黄土构成。主元素氧化物中,SiO_2含量在沙丘砂层呈现峰态,而在黄土、湖相沉积及古土壤呈现谷态;Al_2O_3、TFe(Fe_2O_3 + FeO)、CaO、MgO、 Na_2O、K_2O和TiO_2则在沙丘砂层呈现为谷,在黄土、湖相沉积及古土壤中呈现为峰,SiO_2分别与Al_2O_3等氧化物在垂直方向上呈镜像对称。结合研究区地形,对元素氧化物特征分析后,认为可用硅铝比高低变化指示本区东亚冬夏季风变化。划分出了9个冷暖波动事件,按时间先后依次为:C5(14930~14847 a BP)、W4(14847~13810 a BP)、C4(13810~13620 a BP)、W3(13620~13340 a BP)、C3(13340~13010 a BP)、W2(13010~12650 a BP)、C2(12650~12050 a BP)、W1(12050~11860 a BP)和C1(11860~11600 a BP)。本研究层段与格陵兰GRIP冰芯及南京葫芦洞石笋记录的末次冰消期冷暖变化有较高的相似性,可能本区末次冰消期季风气候变化受北半球高纬驱动。
英文摘要	The last deglaciation segment of the Tumen section on the southern edge of the Tengger Desert is composed of three layers of dune sand,two layers of lacustrine facies,two layers of paleosoil, and five layers of sand loess. Among those major elemental oxides,SiO_2 shows crest in the layers of dune sands,but shows trough in the layers of lacustrine facies, paleosoil and sand loess. In contrast, Al_2O_3, TFe (Fe_2O_3 + FeO), CaO,MgO,Na_2O, K_2O, TiO_2 show trough in the layers of dune sands,but show crest in the layers of lacustrine facies, paleosoil and loess. SiO_2 takes an opposite mirror symmetrical change in the vertical direction with Al_2O_3,etc. We think that changes in silica-alumina ratio could indicate the fluctuation of Asian monsoon climate after analyzing changes in elemental oxides in combination with the particular terrain. Nine cold and warm incidents could be distinguished in terms of silica-alumina ratios. They are C5 (14930~14847 a BP),W4(14847~13810 a BP), C4 (13810~13620 a BP), W3 (13620~13340 a BP),C3 (13340~13010 a BP),W2 (13010~12650 a BP),C2 (12650~12050 a BP),W1 (12050~11860 a BP), and C1 (11860~11600 a BP) in turn. As for the last deglaciation climate fluctuation which was recorded by the last deglaciatioon segment of the Tumen section. The data collected from the Greenland GRSP ice core and Nanjing Hulu cave stalagmites are highly similar. Asian monsoon climate changes during the last deglaciation in this region may be caused by changes in thermohaline circulation in the Northern Hemisphere.
中文关键词	末次冰消期 ; 主元素 ; 古气候 ; 腾格里沙漠南缘 ; 土门剖面
英文关键词	last deglaciation major element paleoclimate southern edge of the Tengger Desert Tumen section
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY ; ENVIRONMENTAL SCIENCES
WOS研究方向	Geology ; Environmental Sciences & Ecology
CSCD记录号	CSCD:5863094
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234081
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	赵占仑,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主元素特征及其记录的古气候环境[J],2016,45(6):623-633.
APA	赵占仑.,温小浩.,李保生.,牛东风.,孟洁.,...&杨庆江.(2016).腾格里沙漠南缘土门剖面末次冰消期层段主元素特征及其记录的古气候环境.地球化学,45(6),623-633.
MLA	赵占仑,et al."腾格里沙漠南缘土门剖面末次冰消期层段主元素特征及其记录的古气候环境".地球化学 45.6(2016):623-633.