干旱区生态环境知识资源中心(Arid): Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals

Arid

DOI	10.1029/2018GL081551
	Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals
	Meng, Xianqiang 1,2; Liu, Lianwen 1; Zhao, Wancang 3; He, Tong 1; Chen, Jun 1; Ji, Junfeng 1
通讯作者	Liu, Lianwen
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:9 页码:4854-4862
英文摘要	It is generally agreed that the aeolian loess on the Chinese Loess Plateau (CLP) is derived from adjacent upwind arid areas, mainly including the Qaidam Desert, Alxa arid area, and Ordos Desert. However, the mineralogical and geochemical compositions of aeolian materials show several inconsistencies between these adjacent source areas and the CLP. Here, we compare the distribution of carbonate minerals in bulk samples and the <63-mu m fraction from upwind deserts to six loess sections from the CLP. The results show that the detrital dolomite and total carbonate, which are abundant in the loess of the CLP, are concentrated in the Taklimakan Desert rather than adjacent source areas. This finding suggests that the distant Taklimakan Desert is an important source of aeolian deposits on the CLP, reconciling the mineralogical and geochemical inconsistencies between CLP and adjacent areas. Plain Language Summary The Taklimakan Desert is the largest source of dust emissions in central Asia. It has not been considered as a source area of aeolian deposits on the distant downwind Chinese Loess Plateau (CLP) in past geological periods due to its semiclosed topography, although their geochemical and mineralogical compositions are similar. The dust material on the CLP has been identified as derived from adjacent upwind arid areas in recent studies. Here, we investigate the distribution of carbonate minerals from potential source areas across a large area and the loess deposits on the CLP. The results show that in bulk samples, carbonate mainly appears in the Taklimakan Desert, depending on the surrounding bedrock types. In the Alxa arid area, only dolomite exists, and carbonate is obviously concentrated in the <63-mu m fraction, possibly influenced by wind transport from the upwind Taklimakan Desert and adjacent areas. Comparing the dolomite and total carbonate distributions between deserts and loess, we find that their initial contents in the loess are slightly lower than those in the <63-mu m fraction of the Taklimakan Desert. These results demonstrate that the distant Taklimakan Desert is necessarily a source of the CLP.
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000468869500034
WOS关键词	CHEMICAL-WEATHERING HISTORY ; SUMMER MONSOON RAINFALL ; DUST SOURCES ; ISOTOPIC CHARACTERISTICS ; TIBETAN PLATEAU ; EOLIAN DEPOSITS ; WESTERN CHINA ; ASIAN DUST ; PROVENANCE ; SR
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	南京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216027
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, Key Lab Surficial Geochem, Minist Educ, Nanjing, Jiangsu, Peoples R China; 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing, Jiangsu, Peoples R China; 3.Southwest Univ, Sch Geog Sci, Chongqing Key Lab Karst Environm, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Meng, Xianqiang,Liu, Lianwen,Zhao, Wancang,et al. Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals[J]. 南京大学,2019,46(9):4854-4862.
APA	Meng, Xianqiang,Liu, Lianwen,Zhao, Wancang,He, Tong,Chen, Jun,&Ji, Junfeng.(2019).Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals.GEOPHYSICAL RESEARCH LETTERS,46(9),4854-4862.
MLA	Meng, Xianqiang,et al."Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals".GEOPHYSICAL RESEARCH LETTERS 46.9(2019):4854-4862.