干旱区生态环境知识资源中心(Arid): Genesis of the Dawadi potassium nitrate deposit in Lop Nor, China

Arid

DOI	10.1038/s41598-021-01278-3
	Genesis of the Dawadi potassium nitrate deposit in Lop Nor, China
	Zhang, Yu; Ma, Lichun; Wang, Kai
通讯作者	Ma, LC (corresponding author), Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	Nitrate deposits are rare worldwide, especially potassium nitrate deposits; furthermore, their genesis remains disputed. There is a rare salt-lake type potassium nitrate deposit in the Dawadi area of Lop Nor at the eastern margin of the Tarim Basin, and the ore bodies show coexisting solid and liquid phases. Additionally, there are large sulphate-type potash deposits in the adjoining Luobei Depression, south of the Dawadi area. To determine why there are two different types of potash deposits in adjacent depressions with similar climates, field geological surveys were conducted and samples collected. It was found that the Tertiary clastic layer at the periphery of the Dawadi deposit was rich in high-salinity brine, with nitrate contents of up to 495-16,719 mg/L, much higher than those in the Luobei Depression, 1-35 mg/L. Additionally, a type of deep hydrothermal (Ca-Cl) brine was found in the fault zones, with nitrate contents of up to 8044 mg/L, dozens of times greater than that of ordinary groundwater. Using comprehensive analysis and research, we concluded that the Dawadi and Luobei depressions belong to different hydrological systems with no connection between them; thus, the two deposits belong to different metallogenic systems. Furthermore, groundwater played an important role in the mineralization of the potassium nitrate deposit, and a deep source may have been an important source of the ore-forming materials. The fault system widely developed in Lop Nor provides favorable channels for deep hydrothermal recharge, and the groundwater and deep hydrothermal brine could provide the source for the nitrate mineralization in the Dawadi Depression through water-rock reactions.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000717747400067
WOS关键词	ATACAMA DESERT ; ORIGIN ; BASIN ; CHILE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373850
作者单位	[Zhang, Yu; Ma, Lichun; Wang, Kai] Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China; [Wang, Kai] China Univ Geosci Beijing, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yu,Ma, Lichun,Wang, Kai. Genesis of the Dawadi potassium nitrate deposit in Lop Nor, China[J],2021,11(1).
APA	Zhang, Yu,Ma, Lichun,&Wang, Kai.(2021).Genesis of the Dawadi potassium nitrate deposit in Lop Nor, China.SCIENTIFIC REPORTS,11(1).
MLA	Zhang, Yu,et al."Genesis of the Dawadi potassium nitrate deposit in Lop Nor, China".SCIENTIFIC REPORTS 11.1(2021).