Hydrochemical insights, water quality, and human health risk assessment of groundwater in a coastal area of southeastern China

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 196(10)

Published: Sept. 20, 2024

Language: Английский

Sources and Enrichment Mechanisms of Li‐Rich Geothermal Springs in the Mediterranean‐Himalayan Belt: Modelling From Li Isotope and Hydrochemistry

Geological Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

ABSTRACT The eastern extension of the Mediterranean‐Himalayan geothermal belt contains numerous springs with anomalously high lithium (Li) content. These have long discharged substantial Li resources to surface, underscoring their potential as a Li‐rich geological feature significant interest. This study utilises field investigations typical high‐temperature, in this region, along isotope tracing, hydrogeochemical analysis, and simulation, elucidate mechanisms behind anomalous enrichment these establish model for systems. Our findings reveal that high‐temperature Yarlung Tsangpo Suture Zone Tibet exhibit highest recorded concentrations, generally exceeding those other by 1–2 orders magnitude, some even reaching concentrations suitable industrial extraction. discrepancy between δ 7 values calculated measured, well water–rock interactions simulated PHREEQC, suggests leached solely from surrounding rocks is insufficient account observed indicating presence additional sources. In conclusion, results combination deep magmatic fluids, regionally Li‐enriched rocks, intense interactions. upwelling residual fluids partial crustal melting plays major role forming unusually contrast, formed mantle‐derived magma, volcanism, or show only slight enrichment.

Language: Английский

Hydrochemical Characterisation and Genesis Mechanism of Li‐Rich Geothermal Waters in the High‐Temperature Geothermal Areas of Western Sichuan, China

Geological Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 27, 2024

ABSTRACT Lithium (Li) is a valuable resource with significant economic benefits and strategic importance. The extraction of Li from Li‐rich geothermal fluids has low production costs may be an essential source in the future. contents high‐temperature systems western Sichuan are high (most exceeding 1 mg/L) reach exploration standard. However, enrichment processes not well known. Therefore, 30 groups natural hot springs ≥ mg/L Batang, Litang, Kangding were selected to analyse mechanism water. average exposed temperatures waters 82.4°C, 53.7°C, 61.9°C, respectively, hydrochemical types HCO 3 ‐Na. concentrations 2.32, 3.29, 3.54 mg/L. Based on δD δ 18 O characteristics, study area originated meteoric water snow‐melt Magmatic was also mixed during circulation, being most (25.0%). Strong water–rock interactions occurred runoff ascent, including silicate mineral dissolution, gas cation exchange. deep reservoir estimated 239°C, 200°C, 242°C, shallow 175°C, 86°C, 116°C. Finally, two mechanisms proposed: (1) Batang Litang mainly came leaching lepidolite spodumene interactions. (2) system input magmatic This research deepens understanding systems, which will helpful for resources.

Language: Английский