气候变化领域集成服务门户(CCPortal): Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai-Tibet Plateau

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DOI	10.1007/s10498-024-09424-9
	Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai-Tibet Plateau
	Yang, Fukang; Fan, Qishun; Han, Guang; Wang, Wanlu; Liu, Jiubo; Bai, Hongkui
发表日期	2024
ISSN	1380-6165
EISSN	1573-1421
英文摘要	Mahai Basin (MH), located in the northern Qaidam Basin (QB), possesses abundant K-rich brine resources. The investigation on the origin of deep K-rich confined brine and the variations in K-Mg elements corresponding to the evolution in MH shed light on the significance of assessment and utilization of brine deposits. This study presents multiple isotopes (delta 18O-delta D, 87Sr/86Sr) and hydrochemical characteristics for various waters (including river water, surface brine, intercrystalline brine, confined brine and anticlinal brine) in the MH. Our findings corroborate that: (1) confined brine exhibits relatively high K+ (average value of 6.88 g/L) and low Ca2+-Sr2+ concentrations, compared to anticlinal brine, and its chemical composition resembles the evolution of Yuqia River in Ca-SO4-HCO3 diagram, suggesting that contemporary river water is the primary source of confined brine. (2) The delta 18O-delta D values of confined brine in MH ranged from - 17.80 to - 27.40 parts per thousand and 1.50 to 2.40 parts per thousand, respectively, and fall on the right field of the local evaporation line, indicating successive evaporation and concentration processes. (3) The 87Sr/86Sr ratios (0.71142-0.71145) of confined brine fall between river water (0.71150-0.71183) and anticlinal brine (0.71135), combining with river water and confined brine which exhibit low Sr content, and further confirming the origin of confined brine is a mixture by river and anticlinal brine and much river recharge budget. (4) Considering the evolution of sedimentary facies (Dezongmahai Lake area as an example) and the gradual increase in K and Mg contents in MH, the enrichment of K and Mg exhibits a certain correlation with the evolution of MH. Notably, the brine in the northeast of the basin displays the highest levels of K and Mg, indicating that this region serves as the ultimate depositional center.
英文关键词	Origin; Brine evolution; K-rich confined brine; Mahai Basin; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001205958500001
来源期刊	AQUATIC GEOCHEMISTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290897
作者单位	Chinese Academy of Sciences; Qinghai Institute of Salt Lakes, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; China Geological Survey
推荐引用方式 GB/T 7714	Yang, Fukang,Fan, Qishun,Han, Guang,et al. Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai-Tibet Plateau[J],2024.
APA	Yang, Fukang,Fan, Qishun,Han, Guang,Wang, Wanlu,Liu, Jiubo,&Bai, Hongkui.(2024).Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai-Tibet Plateau.AQUATIC GEOCHEMISTRY.
MLA	Yang, Fukang,et al."Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai-Tibet Plateau".AQUATIC GEOCHEMISTRY (2024).