geothermal resource potential of the safford-san simon basin, arizona

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Equation (1) Alumino-silicate + H 2 C0 3 (solid) Cations + HC0 3 + Si (OH)4 + kaolinite (solid) where H 2 C0 3 = CO (g) 2 + H29 Si (HO)4 is dissolved silica Comparisons of calculated dissolved carbon dioxide concentrations with silica concentrations in all three types of ground water in the Cactus Flat-Artesia area suggest that a steady-state disequilibrium with alumino-silicates and quartz has a more important influence on silica concentration than does temperature-dependent equilibrium with quartz (Figure 24). Calculation of dissolved carbon dioxide was accomplished using equation (2) from Paces (1972). Equation (2) -log pC0 2 = pH-log HC0 - 3 7.689 - (4.22 x lO-3T) - (3.54 x lO-5T2) where T = Temperature a C and concentration : activity Silica analyses were corrected for ionization at higher pH because analyses report total silica. Silica (Si(OH)4) derived from dissolution of quartz or alumino-silicates dissociates to form SiO (OH);, which at higher pH becomes an important form of dissolved silica. The following equation is used to correct for silica ionization: Equation (3) log Si (OH)4 corrected log Si (OH)4 analyzed log Si (OR); dissociated where log Si (OH); equation (4) and concentration ~ = - 720.15 - 7.3 + pH + log Si (OH)4 273.15 + TOC analyzed activity Equation (4) is derl\Ted in Appendix 2. 65
-2.0 / 15· / / -2.5 -3.5 -4.0 ·27 .25 / / / / • / • 34 / .26 .1 28 .2 • 21 CORRELATION SLOPE INTERCEPT 0.6998 1.5157 3,18 -4.5-1--......:.-..-.....,.-----"'T""'------r------r---'" -5.0 -4.5 -4.0 -3.5 LOG Si(OH)4 Excess Silica INCREASING ACTIVITY (CONCENTRATlON)I------....... -3.0 Figure 24. Dissolved carbon dioxide versus excess silica of ground water in Cactus Flat-Artesia area. 66
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GEOTHERMAL RESOURCE POTENTIAL OF TH
Page 5 and 6:
TABLE OF CONTENTS PAGE List Of Figu
Page 7 and 8:
FIGURES FIGURE 1 FIGURE 2 FIGURE 3
Page 9 and 10:
TABLES TABLE 1 TABLE 2 2A 2B 2C 2D
Page 11:
INTRODUCTION o In the Safford-San S
Page 14 and 15:
Land Status Figure 2 shows land own
Page 16 and 17:
asin are published in Andreasen and
Page 18 and 19:
114° 112° IIO O 108° 106° 104°
Page 20 and 21:
I.D ". ". '. ". ..... ",/" '. ~~~ ~
Page 22 and 23:
side of the mountains and coincide
Page 24 and 25:
stress fields may dilate some of th
Page 26 and 27: I-' Ln !' .. "," "" ,,... P.c Tucso
Page 28 and 29: The upper basaltic andesite, overly
Page 30 and 31: over an inferred decollement in the
Page 32 and 33: attitudes of the thrust faults, rev
Page 34 and 35: gradation is observed only in certa
Page 36 and 37: to depth of 555 meters (Knechtel, 1
Page 38 and 39: asal conglomerate facies of the low
Page 40 and 41: Indian Hot Springs-Gila Valley Intr
Page 42 and 43: flow. A fault zone(s) is inferred t
Page 44 and 45: DWG. NO.-R.-IJ.-~ CALCULATED THICKN
Page 46 and 47: Geophysics, 1979). Nearby at Saffor
Page 48 and 49: Buena Vista Area Introduction More
Page 50 and 51: / I / / / / / / / / / / I / / / / /
Page 52 and 53: 33 34 31 T6S T7S
Page 54 and 55: GElEIEEOl'3,53IEEa3lljO Mile E] B R
Page 56 and 57: similar to the Precambrian granite
Page 58 and 59: 100 + + + + 300 + 500 ~ + + + + + +
Page 60 and 61: 500 m interval, while 1.2 HFU is re
Page 62 and 63: tN I \ 5 IOMiles \ ""1. EXPLANATION
Page 64 and 65: are interpreted as evidence of a ma
Page 66 and 67: LINE 7 RESISTIVITY N =2000 FEET, DI
Page 68 and 69: 100 200 0...---..."...-------------
Page 70 and 71: Artesia in D-8-26-32 and 33 have es
Page 72 and 73: trending 1.5 km 2 closures with soi
Page 74 and 75: waters occur in confined or artesia
Page 78 and 79: Silica concentration in Figure 24 i
Page 80 and 81: San Simon Introduction The San Simo
Page 82 and 83: Geology Subsurface geology controls
Page 84 and 85: " " '"",.- ~--- ,....~, ~. 7 '1.v-~
Page 86 and 87: o 1 Mile '2, WATER LEVEL OF WELLS I
Page 88 and 89: Conclusion Geothermal potential at
Page 90 and 91: geothermometry for waters containin
Page 92 and 93: GRAVITY MODEL OF THE BOWIE AREA Mod
Page 94 and 95: TRANSVERSE TOPOGRAPHIC PROALES ACRO
Page 96 and 97: probably correlative with the "blue
Page 98 and 99: excellent chemical quality suitable
Page 100 and 101: Table 1 Wells With Measured Tempera
Page 102 and 103: Table 1 cont. Wells With Measured T
Page 104 and 105: Table 1 cant. Wells With Measured T
Page 106 and 107: Table 2A. Analyses of Gila Valley-I
Page 108 and 109: Table 2B. Analyses of Buena Vista a
Page 110 and 111: Table 2C. Analyses of Cactus Flat-A
Page 112 and 113: Tabl~ 2E. Analyses of Bowie area gr
Page 114 and 115: Table 3A Geothermometers for the Gi
Page 116 and 117: Table 3C. Geothermorneters for the
Page 118 and 119: Table 3E. Geothermometers for the B
Page 120 and 121: Table 4. Summary table showing aqui
Page 122 and 123: Summary of description of Core Lith
Page 124 and 125: D-7-27-2cdb Driller's log Surface s
Page 126 and 127:
APPENDIX 2 pH Correction for the Si
Page 128 and 129:
By converting milligrams per liter
Page 130 and 131:
APPENDIX 3 Arizona Bureau of Mines
Page 132 and 133:
BIBLIOGRAPHY Aiken~ C. L. V., 1978,
Page 134 and 135:
-3- Davidson, E. S., and Cooley, M.
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-5- Fournier, R. O. and Truesdell,
Page 138 and 139:
7 Marjaniemi, ,D. K., 1968, Geologi
Page 140 and 141:
-9- Scarborough, R. B., 1975, Chemi
Page 142:
Van Horn, W. L., 1958, Late Cenozoi
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geothermal resource potential of the safford-san simon basin, arizona

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