干旱区生态环境知识资源中心(Arid): Lithium and strontium isotopic systematics in the Nalenggele River catchment of Qaidam basin, China: Quantifying contributions to lithium brines and deciphering lithium behavior in hydrological processes

Arid

DOI	10.1016/j.jhydrol.2022.128630
	Lithium and strontium isotopic systematics in the Nalenggele River catchment of Qaidam basin, China: Quantifying contributions to lithium brines and deciphering lithium behavior in hydrological processes
	Miao, Weiliang; Zhang, Xiying; Li, Yulong; Li, Wenxia; Yuan, Xiaolong; Li, Changzhong
通讯作者	Miao, WL ; Zhang, XY
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2022
卷号	614
英文摘要	The salt lakes fed by the Nalenggele River in the Qaidam Basin, located on the northeastern Qinghai Tibetan Plateau (QTP), are major brine lithium reservoirs in China. The quantitative identifications of the Li sources and their dynamic behavior shed light on the formation mechanism of the brine Li deposits in closed-basin of arid regions. This study presents Li and Sr isotope ratios (delta 7Li, 87Sr/86Sr) and other hydrogeochemical parameters for river waters, springs, spring river waters, shallow groundwaters, surface brines, and intercrystalline brines around the Nalenggele River Basin (NRB) and its adjacent small watersheds. The results indicate that the Nalenggele River water is a mixing product of hot springs and regional surface meltwater, and the source of dissolved Li in the NRB is mainly supplied by the hot springs. With multi-tracer models, it is confirmed that around 84.9 %-93.4 % of dissolved Li is provided by the Li-rich hot spring waters, which account for only 3-5 % of the total water input. Furthermore, the dissolved Li in the streams of different hydrological regions shows various isotopic fractionation behavior. In general, the lower average delta 7Li values (average of +5.6 %o) with more enriched Li with respect to Na in the waters of the piedmont Gobi region indicates a significant additional input of dissolved Li from bedrock and sediments. The second-stage alluvial fan of the NRB produces 7Li enrichments and Li-depleted waters (compared with Na), which can be explained by the adsorption of clay or Fe (Mn) oxide phases that fractionate Li isotopes. The highest average delta 7Li values (+12.76 %o) are observed when Li is not adsorbed by the scarce fine clastic sediments in the hypersaline environment of the salt lake region. It can be concluded that the continuous halite precipitation during the brine evolution not only causes the abnormal enrichment of Li in the brine (compared with Na) but also continuously sequesters the 6Li from the brines, resulting in a significant 7Li enrichment. Overall, these findings advance the understanding of the lithium sources of Li-rich brines and its enrichment and metallogenic process during water migration in hyper-arid regions and have crucial indicative significance for lithium cycling under a strong evaporation environment.
英文关键词	Stable isotopes End-member mixing analysis Geochemical behavior Lithium brines Qaidam Basin Qinghai-Tibet Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000883794500006
WOS关键词	QINGHAI-TIBET PLATEAU ; SALT LAKE ; WEATHERING PROCESSES ; MACKENZIE BASIN ; FRACTIONATION ; BORON ; LI ; GROUNDWATER ; CONSTRAINTS ; CHEMISTRY
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393507
推荐引用方式 GB/T 7714	Miao, Weiliang,Zhang, Xiying,Li, Yulong,et al. Lithium and strontium isotopic systematics in the Nalenggele River catchment of Qaidam basin, China: Quantifying contributions to lithium brines and deciphering lithium behavior in hydrological processes[J],2022,614.
APA	Miao, Weiliang,Zhang, Xiying,Li, Yulong,Li, Wenxia,Yuan, Xiaolong,&Li, Changzhong.(2022).Lithium and strontium isotopic systematics in the Nalenggele River catchment of Qaidam basin, China: Quantifying contributions to lithium brines and deciphering lithium behavior in hydrological processes.JOURNAL OF HYDROLOGY,614.
MLA	Miao, Weiliang,et al."Lithium and strontium isotopic systematics in the Nalenggele River catchment of Qaidam basin, China: Quantifying contributions to lithium brines and deciphering lithium behavior in hydrological processes".JOURNAL OF HYDROLOGY 614(2022).