Genesis of geothermal abnormality in the Eastern Himalayan Syntaxis: Constraints from fluid evolution, heat-controlling and lithospheric thermal structure

This study systematically collected geothermal water samples of eastern Himalayan syntaxis (EHS), carried out hydrogeochemical analysis and discussed genetic mechanism of geothermal fluid. This dataset comprises analysis data of geothermal water samples collected from the EHS and calculation formulas of hydrogeochemical geothermometers used in this research. These data include water types, location, elevations, major physical properties, hydrochemical constituents, hydrogen, oxygen and strontium isotopic of samples as well as the estimated reservoir temperatures and mixing ratios of geothermal waters. The data analysis reveals recharge resource, water-rock interaction and ascending cooling processes of geothermal waters, indicating the recharge-runoff-discharge system of geothermal fluids under the multi-stage uplift activities in the EHS.