Deformation and rheology of the Asian continent

Liu, Yongjiang; Liu, Junlai; Neubauer, Franz

doi:10.1016/j.jseaes.2017.04.005

Cited by 1 publication

(1 citation statement)

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“…There are no obvious surface manifestations for high temperature systems in the Western syntax and all the samples are collected from springs (T=9-15℃) and newly drilled wells (T=27-155℃) [3]. Two high temperature geothermal systems of Eastern syntax (Kangding-KD and Batang-BT) are studied [4,5].…”

Section: Samples Descriptionsmentioning

confidence: 99%

Comparison of Geochemical characteristics of geothermal fluids from Eastern and Western Syntaxes, Himalayan belt, China

Pang

Fan

2019

E3S Web Conf.

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High temperature geothermal systems are widely present along the Himalayan belt in the NW China. Strong manifestations have been observed in the Eastern syntax, where geothermal fluids are alkaline with pH almost higher than 9.0 due to boiling and waters are mainly Cl·HCO3-Na and HCO3-Na types. Large amounts of CO2 from carbonate metamorphism are thought to be one of the reasons of calcite scaling and will be a problem for geothermal energy utilization. However, in the Western syntax, there are no obvious manifestations and geothermal fluid is Cl·SO4-Na type with pH about 7.0. High content of Mg, comparing with that of the Eastern syntax, is assumed to be sourced from dissolution of Mg containing minerals and longer water-rock interactions. Calcite is under-saturated indicating no scaling problem in the utilization. Both of the geothermal fluids are recharged by the local precipitation but with different water vapor sources based on water isotope analysis. Therefore, it’s concluded that geothermal fluids from these two syntaxes have gone through totally different geochemical processes and should be carefully monitored in utilization due to the calcite scaling problem.

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Section: Samples Descriptionsmentioning

confidence: 99%