Research progress on geothermal gas [地热气体研究进展]

作者：Tian J.; Pang Z.; Li Y.; Zhou X.

来源：Acta Geologica Sinica, 2022, 96(5): 1752-1766.

DOI：10.19762/j.cnki.dizhixuebao.2022027

• Gas geochemistry
• Gaseous geothermometry
• Gaseous isotopes
• Geothermal gas
• Noble gas

Geothermal gas plays a significant role in geothermal study because it carries direct information on the material and energy deep within the earth. The research objects of geothermal gas geochemistry include gaseous components, such as CO2, H2S, H2, CH4, N2, O2, etc., noble gases such as He, Ne, Ar, Kr, etc., and corresponding isotopes, such as 2H, 13C, 34S, 3He, 4He, 20Ne, 39Ar, 40Ar, 85Kr, 81Kr, etc. These components mainly originate from mantle, crust and atmosphere. After more than 100 years of research, we can analyze the geological settings controlling the distribution of geothermal fluids and the reservoir temperature. Furthermore, they provide the basis for discussing the circulation mechanism of geothermal fluids, itsheat source and the associated gaseous resources in the geothermal systems. In geothermal engineering, research on gas geochemistry can make a big difference in solving problems of greenhouse gas emission, scaling, and corrosion. Due to the urgent demands for reducing carbon peaks and achieving carbon neutrality goals, we should not only establish technical standards and unify the methods used for sampling, storing, and measuring, but also construct specialized platform for geothermal gas measurement. Combining the existing advantages with the major demands of our country, it is suggested that great importance should be attached to geothermal fluid dating, associated gaseous resource, and identifying of geothermal controlled structure.

• 单位
  中国科学院大学; 中国地震局