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

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/ I / / / / / / / / / / I / / / / / / I / I / / / I 2 I 1·/ • 3 I. I I / Correlation Line of /"'2 .. '-__- Cactus Flat-Artesia 1 Wel,. .7 .10 "• .'8 SILICA IN WELLS 5 AND 6 MAY BE IN EQUILIBRIUM WITH CHALCEDONY -4.5 +--...:/--....,-----..,.-----r-------.,----f -5.0 -4~5 -4~0 -3.5 -3.0 LOG SiCOH)4 EXCESS SILICA INCREASING ACTIVITY (CONCENTRATION)------_~ Figure 10. Dissolved carbon dioxide versus excess silica for ground water in the Buena Vista area. 39
hydraulic connection exists between the thermal and non-thermal waters. However, no correlation is apparent among chloride, lithium or boron concentrations. Systematic change in chloride, lithium and boron would confirm mixing because the constituents are highly soluble and are probably not involved in equilibria reactions that cause mineral precipitates; therefore, if variations are observed, they are explained by mixing of high concentration thermal water (provided their concentrations are, in fact, high) with low concentration non-thermal water. Silica and Na-K-Ca geothermometers are calculated for the Buena Vista thermal waters and listed in Table 3. Reliability of the silica geothermometer temperatures are highly suspect because of probable non-quartz or nonchalcedony equilibria control of dissolved silica and, also, because mixing is possible. Likewise, the Na-K-Ca geothermometer is not believed reliable because cation exchange probably occurs among dissolved calcium and sodium contained in clay minerals which occur in basin-fill sediments. In addition, gypsum is possibly present in the basin-fill sediments and probably in the underlying bedrock, which is reported to contain oxidized copper-bearing sulfides in well D-6-27-35CBB (files, USGS, Tucson). Dissolution of gypsum in ground water affects carbonate equilibria because additional calcium is introduced which may cause calcite to precipitate. In waters where calcite has precipitated, erroneously high geothermometer estimates result due to calcium loss. Where dissolution of gypsum occurs with no attendant calcite precipitation, calcium concentration is increased and erroneously low geothermometer temperatures are calculated. Geology and Reservoir Characteristics Regional heat flow studies, reconnaissance geology and geophysics are used to tentatively infer the location, depth, and reservoir characteristics 40
Page 1: 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 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 76 and 77: Equation (1) Alumino-silicate + H 2
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.
Page 136 and 137:
-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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