Mammoth Mine (Arizona Copper Co. group), Garfield Gulch, Greenlee County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Mammoth Mine (Arizona Copper Co. group) | Mine |
| Garfield Gulch | Gulch |
| Greenlee County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
33° 8' 17'' North , 109° 21' 29'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
A former underground Cu mine located on 2 patented claims (Mammoth and Little Mammoth) in the SE¼ sec. 28, T3S, R29E, in Garfield Gulch, 0.5 mile E from the mouth of the canyon; 2.0 miles NW of Metcalf, on private land. Claims extend into the SE quarter of sec. 27. Discovered in 1872 by Isaac Stevens. First produced in 1890. Owned and operated by the Phelps Dodge Corp., Morenci Branch (1922-____). Past owners and operators included Robert Metcalf; the Leszynsky Brothers; and, the Arizona Copper Co. Ltd.
Mineralization is a vein deposit hosted in the Longfellow Limestone. The ore body is tabular, strikes NE and dips 50NW. Ore control was a E-trending fissure vein that follows the main contact between limestone and 200 foot thick porphyry dike. The ore bodies chiefly occur in the limestone and not in the porphyry (Morenci Granite Porphyry). The concentration process was mineralizaton along a fissure vein. Pure kaolin occurs and no sulfide ore is present. Chrysocolla occurs only in kaolin gangue along the contact of porphyry and the sedimentary series.
Area structures include extensive faulting. At the NE end of the tunnel the main fissure appears to break into the porphyry and is complicated by faulting. Normal faulting is confined to pre-Tertiary rocks. Local tectonic features include the Metcalf fault block. The porphyry dike continues from the mine for 0.25 mile to the NE, where the dike and limestone beds are covered by basalt and rhyolite Tertiary flows. Longfellow Limestone beds dip 10NNW in the vicinity of the mine.
Workings included one tunnel 800 feet long, with extensive open stoping above it; one winze 100 feet deep, sunk from the lower tunnel level. Workings total 243.8 meters long and 30.48 meters deep. Production data included on Longfellow Metcalf Mine data; Longfellow Metcalf also includes the other Arizona Copper Co. Ltd. mines of Detroit, Longfellow, Metcalf, Yavapai, Joy, Humboldt, and Coronado.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Azurite Formula: Cu3(CO3)2(OH)2 |
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ Kaolinite Formula: Al2(Si2O5)(OH)4 Colour: Snow-white Description: Occurs as mammillary masses. References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 5 - Nitrates and Carbonates | |||
|---|---|---|---|
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS MRDS: | 10027006 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
- Southern Basin and RangeWide Rift
USA
- Arizona
- Greenlee County
- Copper Mountain Mining District (Clifton-Morenci Mining District)Mining District
- Shannon MountainsMountain Range
- Greenlee County
- Gila MountainsMountain Range
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References
(1911) A Manual of the Copper Industry of the World. The Copper Handbook Vol. 10. Horace J. Stevens p.356 - Arizona Copper Co., Ltd.
Mammoth Mine, Garfield Gulch, Greenlee County, Arizona, USA