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Geoscience ›› 2022, Vol. 36 ›› Issue (02): 507-514.DOI: 10.19657/j.geoscience.1000-8527.2021.049

• Water Resources and Environmental Research • Previous Articles     Next Articles

Geochemical Signature and Genesis of Geothermal Water in Minghuazhen Formation, Luohe, Henan Province

ZHAO Mingkun1,2(), SUN Yajun1, DUAN Zhongfeng3, SHEN Quanwei2, LU Guijing2   

  1. 1. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
    2. Henan Provincial Coal Geological Survey and Research Institute, Zhengzhou, Henan 450052, China
    3. Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, Shandong 266580, China
  • Received:2020-12-22 Revised:2022-02-20 Online:2022-05-10 Published:2022-06-14

Abstract:

Global environmental pollution remains severe, and the development of renewable energy such as geothermal has become a consensus in modern society. By combining systematically the geothermal and geological conditions of Luohe in Henan Province, and taking the Neogene Minghuazhen Formation geothermal water as a case study, we sampled and analyzed the hydrochemical field, temperature field, and isotopes. We proposed a geothermal-geological genetic model for Luohe. Our data indicate that the chemical types of local geothermal water are complex, including mainly Cl-Na, Cl-Na·Ca, Cl·SO4-Na types, followed by Cl·HCO3-Na and SO4·Cl-Na types. The geothermal water is sourced mainly from pore water of the Neogene Minghuazhen Formation with minor lateral recharge. The replenishment source comes mainly from atmospheric precipitation in the western and northwestern hilly areas. The circulation depth is 1,320 m, typical of a conductive geothermal system.

Key words: geothermal geology, water chemistry type, conductive geothermal system

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