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Sierra Estrella deposit, Seven Mile Mountain, Sierra Estrella Mountains, Gila River Indian Reservation, Pinal County, Arizona, USAi
Regional Level Types
Sierra Estrella depositDeposit
Seven Mile MountainMountain
Sierra Estrella MountainsMountain Range
Gila River Indian ReservationReservation
Pinal CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
33° 5' 44'' North , 112° 11' 30'' West
Latitude & Longitude (decimal):
33.09556,-112.19167
GeoHash:
G#: 9tbhr0be8
GRN:
N23W67
Type:
Deposit
Köppen climate type:
BWh : Hot deserts climate
Nearest Settlements:
PlacePopulationDistance
Ak-Chin Village862 (2011)12.2km
Maricopa48,602 (2017)14.0km
Gila Crossing621 (2011)20.3km
Komatke821 (2011)22.0km
Casa Blanca1,388 (2011)28.4km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Rockhounds West ClubPhoenix, Arizona41km
West Valley Rock & Mineral ClubBuckeye, Arizona48km
Flagg Mineral FoundationMesa, Arizona49km
Mindat Locality ID:
130669
Long-form identifier:
mindat:1:2:130669:2
GUID (UUID V4):
0


A pegmatite deposit and former surface mica-quartz mine located in secs. 6, 7 & 8, T4S, R2E, at the south end of the Seven Mile Mountain and about 1¾ miles NNE of Enid. NOTE: May be identical to one or both of the other similar entries for the Sierra Estrella. Deposit extends over secs. 7 & 8.

Mineralization is several small pegmatite bodies in schist. Intergrown K-feldspar and quartz occur with mica. The mica sheets are ruled, rumpled, or flawed. The schist strikes N30-60E and dips steeply; the pegmatites have various strikes and dips.

Workings include prospect openings of shallow pits and bulldozer trenches. Prior to 1952 there was some experimental production of mica.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


2 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Feldspar Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
OOxygen
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2

Other Databases

Link to USGS MRDS:10060345

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

MRDS database Dep. ID #10060345, MRDS ID #TC10720; and Dep. ID #10186833, MAS ID #0040210753.
Wilson, E.D. (1969) Mineral Deposits of the Gila River Indian Reservation, Arizona. Arizona Bureau of Mines Bull. 179, 34 pp.
Arizona Geological Survey (1969) Bull. 280: 345.
Moore, R.T. & R.J. Varga (1976), Maps showing nonmetallic mineral deposits in the Phoenix area, Arizona: USGS Miscellaneous Investigations map I-845-J, 1:250,000.
Elevatorski, E.A. (1980) Arizona Industrial Minerals: 54.
Phillips, Ken A. (1987) Arizona Industrial Minerals - Department of Mines & Minerals Report #4 (2nd ed.). Arizona Department of Mines and Mineral Resources. 197 pp.
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
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