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Table 3 Calculation results of quartz geothermometer and silicon enthalpy mixture model

From: Geochemical and H–O–Sr–B isotope signatures of Yangyi geothermal fields: implications for the evolution of thermal fluids in fracture-controlled type geothermal system, Tibet, China

Location

Sample No

Quartz a

Quartz b

Silica–enthalpy mixing model

Temperature (℃)

Mixing proportion

BSGZ

D2707

153.31

146.20

D2708

171.41

161.15

D2709

156.89

149.17

YYT-6*

227.72

206.46

YYT-7*

221.50

201.54

YYT-8*

178.27

166.77

ZK204^

183.12

170.72

CHK4^

170.66

160.54

ZK207^

189.99

176.30

NSGZ

D2712

136.07

131.77

189.89

0.58445

D2713

158.63

150.61

251.8654

0.71929

D2716

156.01

148.44

233.3125

0.665579

ZK401^

177.36

166.03

D2815^

145.65

139.81

QSGZ

D2804

162.83

154.08

249.7009

0.692617

D2807

153.31

146.20

D2811

156.01

148.44

YYT-1*

185.96

173.03

YYT-2*

185.26

172.46

YYT-3*

188.37

174.99

YYT-4*

183.79

171.27

Q502^

159.77

151.56

Q572^

125.10

122.49

239.8708

0.827619

  1. Quartza: no steam loss,\(T=\frac{1309}{5.19-{lgC}_{SiO2}}-273.15\) (Fournier and Potter 1982); Quartzb: maximum steam loss, \(T=\frac{1522}{5.75-{lgC}_{SiO2}}-273.15\)(Fournier 1977). “^” means the data obtained from The Geothermal Geological Team of Tibet (1990); “*” means the data obtained from Yuan et al. (2014); “–” represent no results