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Vekol Hills project (Vekol Hills; Newmont Vekol), Kohatk, Vekol District, Vekol Mts, Tohono O'odham Indian Reservation, Pinal Co., Arizona, USAi
Regional Level Types
Vekol Hills project (Vekol Hills; Newmont Vekol)Project
Kohatk- not defined -
Vekol DistrictMining District
Vekol MtsMountain Range
Tohono O'odham Indian ReservationReservation
Pinal Co.County
ArizonaState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 32° 35' 21'' North , 112° 3' 14'' West
Latitude & Longitude (decimal): 32.58917,-112.05389
GeoHash:G#: 9tb36hsve
USGS MRDS Record:10046282
Locality type:Project
Köppen climate type:BWh : Hot deserts climate
Nearest Settlements:
PlacePopulationDistance
Vaiva Vo128 (2011)18.6km
Anegam151 (2011)24.1km
Kaka141 (2011)26.1km
Santa Rosa628 (2011)29.5km
Chuichu269 (2011)31.1km


A Cu-Au-Ag-Mo-Zn deposit located in the NW¼ sec. 4, T10S, R3E (Vekol Mts 15 minute topo map) and in sec. 33, T9S, R3E, about 3½ miles W of Kohakt and about 1½ Miles SW of the Reward Mine. Discovered 1965.

Mineralization is hypogene enrichment with minor oxidation and supergene enrichment. The ore zone strikes N45E and dips 10W, at 259.08 meters thick, 106.68 meters depth-to-top, 670.56 meters wide and 914.4 meters long. Precambrian through Devonian age rocks were mineralized by solutions associated with Laramide porphyries. The porphyries themselves contain only minor mineralization. Oxidation and supergene enrichment are relatively minor. Ore control was diabase and sedimentary rocks near the contact of Laramide stock, and fracturing. Host rock unit is Pinal Schist; the Apache group; Martin Limestone; Bolsa Quartzite and the Abrigo formation. Related structures are major fracture control complex faulting and tilting. The mineralized area covers about a quarter section on the easterly sloping pediment at the NE edge of the Vekol Mountains.

Ore reserves were estimated at 45,351,000 metric tons of ore (1978).

Regions containing this locality

North America PlateTectonic Plate
Sonoran Desert, North AmericaDesert

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

Bornite
Formula: Cu5FeS4
Chalcocite
Formula: Cu2S
Chalcopyrite
Formula: CuFeS2
Chlorargyrite
Formula: AgCl
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Fornacite
Formula: Pb2Cu(CrO4)(AsO4)(OH)
Gold
Formula: Au
Hematite
Formula: Fe2O3
Kaolinite
Formula: Al2(Si2O5)(OH)4
'Limonite'
Formula: (Fe,O,OH,H2O)
Malachite
Formula: Cu2(CO3)(OH)2
Molybdenite
Formula: MoS2
Pyrite
Formula: FeS2
Quartz
Formula: SiO2
Silver
Formula: Ag
Sphalerite
Formula: ZnS

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 3 - Halides
Chlorargyrite3.AA.15AgCl
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Fornacite7.FC.10Pb2Cu(CrO4)(AsO4)(OH)
Group 9 - Silicates
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 9 - NORMAL HALIDES
AX
Chlorargyrite9.1.4.1AgCl
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 43 - COMPOUND PHOSPHATES, ETC.
Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
Fornacite43.4.3.2Pb2Cu(CrO4)(AsO4)(OH)
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H MalachiteCu2(CO3)(OH)2
H KaoliniteAl2(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H FornacitePb2Cu(CrO4)(AsO4)(OH)
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O MalachiteCu2(CO3)(OH)2
O HematiteFe2O3
O KaoliniteAl2(Si2O5)(OH)4
O Limonite(Fe,O,OH,H2O)
O FornacitePb2Cu(CrO4)(AsO4)(OH)
O QuartzSiO2
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al KaoliniteAl2(Si2O5)(OH)4
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si KaoliniteAl2(Si2O5)(OH)4
Si QuartzSiO2
SSulfur
S BorniteCu5FeS4
S ChalcociteCu2S
S ChalcopyriteCuFeS2
S MolybdeniteMoS2
S PyriteFeS2
S SphaleriteZnS
ClChlorine
Cl ChlorargyriteAgCl
CrChromium
Cr FornacitePb2Cu(CrO4)(AsO4)(OH)
FeIron
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
CuCopper
Cu BorniteCu5FeS4
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu MalachiteCu2(CO3)(OH)2
Cu FornacitePb2Cu(CrO4)(AsO4)(OH)
ZnZinc
Zn SphaleriteZnS
AsArsenic
As FornacitePb2Cu(CrO4)(AsO4)(OH)
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag SilverAg
Ag ChlorargyriteAgCl
AuGold
Au GoldAu
PbLead
Pb FornacitePb2Cu(CrO4)(AsO4)(OH)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Campanian - Oxfordian
72.1 - 163.5 Ma



ID: 2831402
Cretaceous to Late Jurassic sedimentary rocks with minor volcanic rocks

Age: Mesozoic (72.1 - 163.5 Ma)

Stratigraphic Name: Temporal Formation; Bathtub Formation; Sand Wells Formation; Fort Crittenden Formation; McCoy Mountains Formation

Description: Sandstone and conglomerate, rarely forms prominent outcrops; massive conglomerate is typical near base of unit and locally in upper part. These deposits are nonmarine except in southeastern Arizona, where prominent gray marine limestone (Mural Limestone) forms the middle of the Bisbee Group. Sandstones are typically medium-bedded, drab brown, lithic-feldspathic arenites. Includes Bisbee Group (largely Early Cretaceous) and related rocks, Temporal, Bathtub, and Sand Wells formations, rocks of Gu Achi, McCoy Mountains Formation, and Upper Cretaceous Fort Crittenden Formation and equivalent rocks. (80-160 Ma)

Comments: Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.

Lithology: Major:{arenite,conglomerate}, Minor:{limestone}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Skillings Mining Review (1970), Dec 26, 70: 1.
World Mining (1971), April 1971: 48.
World Mining (1976) June, 1976: 44.
Chaffee, Maurice A. (1977), Geochemical exploration techniques based on distribution of selected elements in rocks, soils, and plants, Vekol porphyry copper deposit area, Pinal County, Arizona: USGS Bulletin 1278-E.
Paydirt (1977), July 1977: 1.
World Mining (1977), September, 1977: 172.
U.S. Department of the Interior, Bureau of Indian Affairs (1977) Vekol Hills Project, Papago Indian Reservation, Pinal County, Arizona: U.S. Department of Interior, Bureau of Indian Affairs, 227 p.
Papago Indian Reservation, Pinal County, Arizona, Bureau of Indian Affairs (1977), 5/18/77: 6.
Draft Environmental Impact Statement - Vekol Hills project.
Greely (1978) Arizona Department of Mineral Resources Special Report 2: 83-87.
Steele (1978) Arizona Geological Society Digest, Vol. 11: 36.
New Mexico Paydirt (1979) U.S. Copper Production could be Increased by 53 Percent in 1980's, Survey Shows, May, 1979: 58.
Vekol Hills Project EIS, U.S. Department of the Interior (1988).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 15 (Table 1).
Sawyer, M.B., Gurmendi, A.C., Daley, M.R., and Howell, S.B. (1992) Principal Deposits of Strategic and Critical Minerals in Arizona, U.S. Bureau of Mines Special Publication, 334 pp.
Singer, D.A., Berger, V.I., and Moring, B.C. (2005): Porphyry Copper Deposits of the World: Database, Map, and Grade and Tonnage Models. USGS Open-File Report 05-1060.
MRDS database Dep. ID #10046282, MRDS ID #M241177; and Dep. ID #10234917, MAS ID #0040210003.


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