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

doi:10.1007/s10498-024-09424-9

Aquat Geochem

2024

DOI: 10.1007/s10498-024-09424-9

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Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai–Tibet Plateau

Fukang Yang,

Qishun Fan,

Guang Han

et al.

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2024

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Cited by 5 publications

References 19 publications

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Inheritance recharge of subsurface brine constrains on formation of K-bearing sand-gravel brine in the alluvial fan zone of mountain-basin system on the Qinghai-Tibetan Plateau

Fan,

Han,

Chen

et al. 2024

Journal of Hydrology

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Inheritance recharge of subsurface brine constrains on formation of K-bearing sand-gravel brine in the alluvial fan zone of mountain-basin system on the Qinghai-Tibetan Plateau

Fan,

Han,

Chen

et al. 2024

Journal of Hydrology

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Sedimentary Environment and Source Analysis of Sedimentary Lithium Deposits in Dezong Mahai Salt Lake, Qaidam Basin

Ma,

Qin,

Pan

et al. 2024

Sustainability

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Lithium possesses exceptionally high economic and strategic significance. China’s lithium resources rank second globally, predominantly found in salt lake brine. Recently, clay-type lithium deposits have been discovered in the Mahai Salt Lake within the Qaidam Basin, featuring a broad distribution area, stable production layers, and thick strata. This paper investigates the mineral sources and mining circumstances of the clay deposits in the study area through the principal trace elements and Sr and Li isotopes of the clay rocks. The study reveals that the sedimentation of the clay deposits in the study area is mainly semi-brine–brackish water phase sedimentation, formed in a shallow water environment of weak oxidation. A terrigenous source characterizes the clay sediment. The tectonic setting of the study area shares common traits with a continental island arc-active continental margin, and the abundant lithium clay rocks mainly receive contributions of feldspar, amphibole, pyroxene, etc. The primary sediment source of the clay deposits mainly stems from igneous and quartz sediment source areas. The 87Sr/86Sr value indicates that the Sr source of the clay rocks in the study area is the shallow over-pressured brine and Yuka River water, mainly derived from the weathering dissolution of silicate rocks. The δ7Li value indicates that the lithium in the lithium-rich clay rocks mainly originates from the release of lithium from silicate minerals in the surrounding mountain ranges, carried by Yuka River water, and from the supply of lithium from the deep Ca-Cl type water body. The research findings establish a foundation for the future exploration and development of clay-type lithium deposits in salt lake regions.

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Source and Origin of Subsurface Brine of the Kongquehe Sag Area in Western Lop Nur, China

Jiang,

Wang,

Guo

et al. 2024

Water

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The Kongquehe Sag, located in the western Lop Nur, has abundant pore subsurface brine. In order to study the source and origin, we tested and analyzed the hydrochemical composition and stable isotopes of the subsurface brine. The findings reveal that the brine exhibits a moderate to low degree of mineralization, with values ranging from 50.50 g/L to 91.14 g/L. The stable isotope compositions of unconfined and confined waters are different, with the mean values of δD being −8.00‰ and −51.75‰ and the mean values of δ18O being 10.08‰ and −6.01‰. These values are indicative of an intense evaporative environment prevalent in the Kongquehe Sag area. Furthermore, the 87Sr/86Sr ratios vary between 0.710642 and 0.710837, and δ34S values range from 9.2 to 10.7. These data suggest the long-term evolution of sulfur substances, predominantly through dissolution and sedimentation processes, with minimal influence from redox reactions. The data garnered from this research not only offer a novel perspective of the insights gained into the hydrochemical characteristics and the stable isotope signatures of the brines in the Kongquehe Sag area but also enriches the theoretical framework concerning the source and origin of subsurface brines, potentially informing future exploration strategies.

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Origin and Evolution of Deep K-Rich Confined Brine in Mahai Basin, Qinghai–Tibet Plateau

Cited by 5 publications

References 19 publications

Inheritance recharge of subsurface brine constrains on formation of K-bearing sand-gravel brine in the alluvial fan zone of mountain-basin system on the Qinghai-Tibetan Plateau

Inheritance recharge of subsurface brine constrains on formation of K-bearing sand-gravel brine in the alluvial fan zone of mountain-basin system on the Qinghai-Tibetan Plateau

Sedimentary Environment and Source Analysis of Sedimentary Lithium Deposits in Dezong Mahai Salt Lake, Qaidam Basin

Source and Origin of Subsurface Brine of the Kongquehe Sag Area in Western Lop Nur, China

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