Baboquivari Mine (Black Diamond group; Red and Black Chief group), Baboquivari Mining District, Baboquivari Mountains, Pima County, Arizona, USAi
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Latitude & Longitude (WGS84):
31° 42' 27'' North , 111° 36' 6'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| South Komelik | 111 (2011) | 16.3km |
| San Miguel | 197 (2011) | 20.0km |
| Topawa | 299 (2011) | 24.3km |
| Aduana del Sásabe | 1,295 (2018) | 26.8km |
| Arivaca | 695 (2011) | 29.4km |
Ref.: Farnham, L.L., Stewart, L.A., and Delong, C.W. (1961), Manganese Deposits of Eastern Arizona, US Bureau of Mines Information Circular 7990: 121-122.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 108 (Table 4).
MRDS database Dep. ID file #10039529, MRDS ID #M050225; and, Dep. ID #10186494, MRDS ID #TC40029, MAS ID #0040190108; and, Dep. ID #10259223, MAS ID #0040190456.
A former small surface and underground Mn-FeO-Cu-Ag-Au mine located in the NW¼ sec. 11, T.20S., R.7E., 4.5 air miles S of Baboquivari Peak. Discovered 1915 (World War I). Produced 1917. Owned by Forrest G. Miller and Manuel L. Obregon.
Mineralization is manganese oxides and silicate with abundant iron oxides along narrow fracture zones, in seams and veinlets, in a sheared and brecciated andesite dike cutting Cretaceous sediments. The ore body is 121.92 meters long and 91.44 meters wide striking E-W. Irregular and discontinuous veinlets from a fraction of an inch to 1 foot (30 cm) or more wide in sporadic areas 1,500 feet or more along strike of the fracture zone.
Tests on high grade samples containing 25% Mn showed a recovery of 81% of Mn in a product assaying 55% Mn and 3.6 % Fe by a combination od methods including concentration by tabling and flotation followed by magnetic separation (poor recovery by tabling and flotation methods).
Workings include sample trenches, 12 or more open cuts and a shaft(s) to a depth of 7.62 meters. About 2 carloads of hand-sorted manganese ore was shipped in 1917. Exploration and development since has not resulted in production. Ore was mined from one 25 foot shaft and a 20 foot long open stope.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities2 valid minerals.
Detailed Mineral List:
| ⓘ 'Psilomelane' |
| ⓘ Pyrolusite Formula: Mn4+O2 |
| ⓘ Rhodonite Formula: CaMn3Mn[Si5O15] Description: Minor. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| Group 9 - Silicates | |||
| ⓘ | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Si | Silicon | |
| Si | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Ca | Calcium | |
| Ca | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | Manganese | |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Mn | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
Other Databases
| Link to USGS MRDS: | 10039529 |
|---|
Localities in this Region
- Arizona
- Pima County
- Baboquivari Mountains
- Baboquivari Mining District
- Baboquivari Mine (Black Diamond group; Red and Black Chief group)
- Baboquivari Mining District
- Baboquivari Mountains
- Pima County
Other Regions, Features and Areas containing this locality
Mexico
- Sierra Madre OccidentalMountain Range
North AmericaContinent
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
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