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Escondida claims, Fresnal Canyon, Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima Co., Arizona, USAi
Regional Level Types
Escondida claimsGroup of Claims
Fresnal CanyonCanyon
Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District)Mining District
Sierrita MountainsMountain Range
Pima Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
31° 54' 23'' North , 111° 12' 21'' West
Latitude & Longitude (decimal):
Locality type:
Group of Claims
Nearest Settlements:
PlacePopulationDistance
Green Valley21,391 (2011)20.8km
Three Points5,581 (2011)21.5km
Arivaca Junction1,090 (2011)24.1km
Sahuarita25,707 (2017)24.3km
Amado295 (2011)25.8km


Ref.: US Atomic Energy Commission Preliminary Reconnaissance Report Pima County (1955): 641.

U.S. Atomic Energy Commission RME-159 (1970) Preliminary Reconnaissance for Uranium in Pima and Pinal Counties, Arizona, 1950 to 1957: 197.

MRDS database Dep. ID file #10048218, MRDS ID #M800303; and, Dep. ID #10210585, MAS ID #0040190220.

A Cu-U occurrence/group of claims with surface workings located in sec. 34, T17S, R11E, near the Gunsight Ranch, on private land. Owned by C. Lemons and O. Parmer (1955).

Mineralization is ore that strikes N70E and dips 65N, and is hosted in mafic intrusive rock. Radioactivity: background 0.04 mr/hr, 0.16 mr/hr.

Workings include 2 pits.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

Chalcopyrite
Formula: CuFeS2
Reference: MRDS database Dep. ID file #10048218, MRDS ID #M800303.
Pyrite
Formula: FeS2
Reference: MRDS database Dep. ID file #10048218, MRDS ID #M800303.
Uraninite
Formula: UO2
Reference: MRDS database Dep. ID file #10048218, MRDS ID #M800303.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Uraninite4.DL.05UO2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2

List of minerals for each chemical element

OOxygen
O UraniniteUO2
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
UUranium
U UraniniteUO2

Other Databases

USGS MRDS Record:10048218

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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