Max Delta Mine, Gila Crossing District, South Mountain (South Mountains; South Mountain Park), Phoenix, Maricopa County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Max Delta Mine | Mine |
| Gila Crossing District | Mining District |
| South Mountain (South Mountains; South Mountain Park) | - not defined - |
| Phoenix | City |
| Maricopa County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
33° 19' 44'' North , 112° 5' 50'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Laveen | 5,930 (2018) | 7.7km |
| Komatke | 821 (2011) | 8.2km |
| Gila Crossing | 621 (2011) | 8.7km |
| Ahwatukee Foothills | 83,464 (2018) | 10.6km |
| Central City | 58,161 (2018) | 12.9km |
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 |
|---|---|---|
| Rockhounds West Club | Phoenix, Arizona | 13km |
| Flagg Mineral Foundation | Mesa, Arizona | 26km |
| Mineralogical Society of Arizona | Paradise Valley, Arizona | 28km |
| West Valley Rock & Mineral Club | Buckeye, Arizona | 45km |
Other/historical names associated with this locality:
Delta Mine; Ace Mine; Leggat patented claim; Richard Santon claim; Maxamillion claims; Hall claim; Montana claim; Ora Granda claims; Thompson patented claim
A former surface and underground Au-Ag-Cu mine located about 9 miles South of the railroad at Phoenix in the northern portion of South Mountain on state park land. Discovered 1895 and produced 1913-1942. Owned by T.C. McReynolds, Jr.; and, the Ace Mining & Development Co. (1933- ).
Mineralization is in schist and gneiss that dip prevailingly northward at low angles but show much local disturbance by faulting. Most underground work was done on 3 intersecting, faulted veins (N60W - dip 50NE; N30W - dip 60NE; and, N10W - dip 20 to 40NE). The largest oreshoot was about 100 feet long by 100 feet high on the dip by an average of 5 feet (1.5 meters) wide). Oreshoots are lenticular veins of quartz that locally form stockworks up to 8 fet wide. Ore consists of coarse-textured, grayish-white quartz with irregular bunches & disseminations of pyrite, locally altered to limonite and hematite. Wall rocks show considerable sericitization. Vein outcrops are inconspicuous.
Workings include a 500 foot deep shaft & extensive drifts (about 2,500 feet of tunnels & some stopes). Produced 1,600 tons of ore at 0.7 ounces Au/ton & about 1 ounce Ag/ton (1933-1934).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
6 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 References: |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) References: |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ 'Limonite' |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | Oxygen | |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS MRDS: | 10104089 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
- Southern Basin and RangeWide Rift
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Max Delta Mine, Gila Crossing District, South Mountain, Phoenix, Maricopa County, Arizona, USA