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      Chapter

      Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent
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      Chapter

      Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent

      DOI link for Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent

      Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent book

      Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent

      DOI link for Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent

      Major factors and processes controlling hydrochemistry of N2-bearing thermal waters in crystalline rocks of rift zones on the east Asia continent book

      ByYanxin Wang, Lianfa Sun, G.M. Shpeyzer, N.M. Zhekunova, V.A. Rodionova, I.S. Lomonosov
      BookWater-Rock Interaction

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      Edition 1st Edition
      First Published 1995
      Imprint Routledge
      Pages 4
      eBook ISBN 9780203734049
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      ABSTRACT

      In the past 20 years, comprehensive hydrogeochemical research on more than 200 thermal waters in rift zones on the east Asia continent including Baikal (Russia), Fengwei (China) and Hubsugul (Mongol) has been carried out by the authors. There are three end members of hydrochemical types: (1) SO4-Na water, (2) Cl-SO4-Na-(Ca) water, both of which have TDS values between 0.5 and 2.0 g/L, and (3) HCO3-(CO3)-Na water with TDS less than 0.5 g/L. All of them are formed in weakly alkaline environments. Their compositions are largely determined by water-rock interactions and local geothermal conditions. Besides, there are thermal waters of transitional types (SO4-HCO3-Na-(Ca) water, HCO3-(Cl)- SO4-Na-(Ca) water and SO4-HCO3 -Na-(Ca)water) whose compositions are controlled both by water -rock interactions and by mixing processes. Most of the HCO3-(CO3) - Na waters are alkaline (pH up to 9.4) with relatively high contents of CO 3 2 − https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203734049/8ccf6b8f-3ccf-4e19-b1d7-52ac3eb44ef1/content/eq213.tif"/> which intensifies the migration of fluorine leached from hostrocks. Intensive evaporation due to local arid climate is responsible for the occurrence of such alkaline waters.

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