Little Fanny Mine group, Cochise Mining District, Cochise County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Little Fanny Mine group | - not defined - |
| Cochise Mining District | Mining District |
| Cochise County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° 3' 29'' North , 110° 6' 1'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Dragoon | 209 (2011) | 6.7km |
| Saint David | 1,699 (2011) | 20.2km |
| Benson | 4,888 (2017) | 20.9km |
| Whetstone | 2,617 (2011) | 25.4km |
| Mescal | 1,812 (2011) | 32.5km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Sunsites Gem and Mineral Club | Pearce, Arizona | 31km |
Mindat Locality ID:
32446
Long-form identifier:
mindat:1:2:32446:2
GUID (UUID V4):
87710a90-da83-4d00-ab24-ba27b2bdf27b
Other/historical names associated with this locality:
Little Fanny Mine; Little Fanny group of claims; Last Chance Mine; Alvera Mine; Alvera Extension Mine; Dragoon Ground
A former small surface and underground W-Fluorspar-Pb-Be-Ag-Au group of mines located on 14 unpatented claims adjacent to the Primos ground on the SW in the central part of sec. 9 and sec. 3, T.16S., R.22E, 3½ miles SW of Johnson, and about 11 miles NE from Benson, 1 mile SW of the Primos Mine. Discovered 1898 by Asa Walker. Owned by Mr. Joseph Robles (1964). Operated by the Dragoon Mining Corp., Coronado Copper and Zinc Co. (1973). Started during WWI and owned by the Dragoon Mining Corp. (1938- ).
Mineralization is a vein deposit that crops out about 1,200 feet NW of a minor parallel lead. Mineralization includes hübnerite with minor scheelite, pyrite, and galena in quartz veins cutting sheared and altered Laramide quartz monzonite (Texas Canyon stock). Gangue consists of coarsely crystalline, grayish-white quartz with some purple fluorite. The ore zone is 60.96 meters long and 0.76 meters thick, strikes N45E and dips 70SE.
Numerous small veins sometimes constituted lodes. Minor vein systems (1) strike N 15E dip 40 to 60 E. (2) strike N 65 E dip 80 S.
Faulting was contemporaneous with vein formation. Quartz veins 1 to 8 inches thick occur in three well-defined sets. Some are offset and sheared. Normal fault movement. Offset is small (inches). Veins occur en echelon.
Local structures include Tertiary block faulting trending NNW. Regionally, Late Cretaceous or Early Tertiary N- to NW-trending folds and thrust faults override to the NE. Also normal faulting.
Workings include extensive surface openings (numerous pits and open cuts 5 to 20 feet deep) and some 1,600 or more feet (487 meters) of adit tunnels and small stopes. A total of at least 32 tons (55,000 pounds [1934-38]; 8,000 pounds of concentrates [June, 1937- October, 1939]) of tungsten concentrates were produced during 1914-1918, 1934-1939, 1941-1945, and in 1948. Past production of fluorite occurred.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Beryl Formula: Be3Al2(Si6O18) |
| ⓘ Fluorite Formula: CaF2 |
| ⓘ Galena Formula: PbS |
| ⓘ Hübnerite Formula: MnWO4 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 Description: Clear crystals. |
| ⓘ Quartz var. Rock Crystal Formula: SiO2 Description: Clear crystals. |
| ⓘ Scheelite Formula: Ca(WO4) |
| ⓘ Willemite Formula: Zn2SiO4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Rock Crystal | 4.DA.05 | SiO2 |
| ⓘ | Hübnerite | 4.DB.30 | MnWO4 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 9 - Silicates | |||
| ⓘ | Willemite | 9.AA.05 | Zn2SiO4 |
| ⓘ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
List of minerals for each chemical element
| Be | Beryllium | |
|---|---|---|
| Be | ⓘ Beryl | Be3Al2(Si6O18) |
| O | Oxygen | |
| O | ⓘ Beryl | Be3Al2(Si6O18) |
| O | ⓘ Hübnerite | MnWO4 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Scheelite | Ca(WO4) |
| O | ⓘ Willemite | Zn2SiO4 |
| O | ⓘ Quartz var. Rock Crystal | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Al | Aluminium | |
| Al | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | Silicon | |
| Si | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Willemite | Zn2SiO4 |
| Si | ⓘ Quartz var. Rock Crystal | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Mn | Manganese | |
| Mn | ⓘ Hübnerite | MnWO4 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Willemite | Zn2SiO4 |
| W | Tungsten | |
| W | ⓘ Hübnerite | MnWO4 |
| W | ⓘ Scheelite | Ca(WO4) |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10039395 |
|---|
Other Regions, Features and Areas containing this locality
Mexico
- Sierra Madre OccidentalMountain Range
North America
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
USA
- Arizona
- Cochise County
- Little Dragoon MountainsMountain Range
- Cochise County
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References
