干旱区生态环境知识资源中心(Arid): 丹江谷地晚更新世黄土剖面微量元素地球化学特征研究

Arid

	丹江谷地晚更新世黄土剖面微量元素地球化学特征研究
其他题名	Geochemistry characteristics of trace elements in the Loess - paleosol sequence, Danjiang River Valley
	王海燕; 庞奖励; 黄春长; 周亚利; 张文桐
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2019
卷号	33 期号:4 页码:168-175
中文摘要	文中以丹江河谷二级阶地前缘覆盖的黄土剖面为研究对象,研究Mn、Ni、Cu、Ba、La、Rb、Sr 7种微量元素在剖面中的波动特征,并对比黄土高原典型黄土,探讨其蕴含的古气候意义.结果显示:7种微量元素在剖面中的波动特征是气候变化的直接反映;Mn、Ni、Cu、Ba、Rb在古土壤层( S_1、S_0 )出现高值,在黄土层(Lt、 L_2、L_1 )出现低值,La、Sr在黄土层(Lt、L_2、L_1 )含量较高,在古土壤(S_1、S_0 )层含量低,微量元素动态变化特征指示古土壤形成时期气候温暖湿润,成壤作用强,黄土堆积时期冬季风为主导,降水较少,成壤作用较弱;其中在马兰黄土形成时期,气候经历了短暂的温暖期;与黄土高原微量元素总体具有较好的相似性,指示两个区域受后期沉积环境影响基本相同,相比较而言,丹江地区的形成环境较黄土高原暖湿,风化成壤作用强于黄土高原地区.
英文摘要	Based on systematic experiment analysis of trace elements including Mn,Ni,Cu,Ba,La,Rb and Sr for Longquancun profile covered by the front edge of the second terrace in the Danjiang River Valley,these characteristics reveal the weathering intensity of Loess - paleosol sequence and its palaeoclimatic significance since late Pleistocene. At the same time,the typical loess on the loess plateau is compared. Results are shown as follows: the fluctuation characteristics of 7 trace elements in the profile are direct reflection of climate change. Mn, Ni,Cu,Ba and Rb have high values in paleosol layer (S_1,S_0 ),low values in the loess layer (Lt,L_2,L_1 ); However,La and Sr are high in loess layer (Lt,L_2,L_1 ),low in paleosol (S_1,S_0 ). The environment changes since late Pleistocene have been clearly recorded by the changes in the trace elements in this area. That is,the climate was warm and the pedogenesis was stronger in the period of the palaeosol formation. In the stage of the loess accumulation,the climate was cold and arid,so the weathering pedogenesis was very weak. Among them, during the period of the formation of Malan loess,the climate experienced a short period of warm. The trace elements in the Danjiang region are similar to those in the Loess Plateau,which indicates that the two regions are basically the same under the influence of the late sedimentary environment. The chemical weathering of LQC profile was stronger than that of the loess and paleosol in Luochuan.
中文关键词	黄土 ; 微量元素 ; 气候变化 ; 丹江谷地
英文关键词	Loess - paleosol Trace - element Climate change Danjiang River Valley
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:6458046
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239192
作者单位	陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国
推荐引用方式 GB/T 7714	王海燕,庞奖励,黄春长,等. 丹江谷地晚更新世黄土剖面微量元素地球化学特征研究[J]. 陕西师范大学,2019,33(4):168-175.
APA	王海燕,庞奖励,黄春长,周亚利,&张文桐.(2019).丹江谷地晚更新世黄土剖面微量元素地球化学特征研究.干旱区资源与环境,33(4),168-175.
MLA	王海燕,et al."丹江谷地晚更新世黄土剖面微量元素地球化学特征研究".干旱区资源与环境 33.4(2019):168-175.