Logan Mine (Trans-Oceanic Mine; Treasure Mine), Cady Peak, San Bernardino County, California, USAi
| Regional Level Types | |
|---|---|
| Logan Mine (Trans-Oceanic Mine; Treasure Mine) | Mine |
| Cady Peak | Peak |
| San Bernardino County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
34° 50' 21'' North , 116° 21' 34'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Baker | 735 (2011) | 54.0km |
| Fort Irwin | 8,845 (2011) | 55.6km |
A former Mn-Fe-P-S-silica occurrence/mine located in the SE¼NW¼SW¼ sec. 28, T9N, R6E, SBM, 4.5 km (2.8 miles) SSW of Cady Peak (coordinates of record), on the S flank of the Cady Mountains, N of Pisgah (on the sides and crest of a steep, narrow ridge trending SE), on Bureau of Land Management administered land (located claims). The property is comprised of 18 claims. Discovered in 1930. First produced in 1934. MRDS database stated accuracy for this location is 10 meters.
Mineralization is hosted in andesite. The ore body strikes N45W and dips 60N at a thickness of 18 meters, depth-to-top 1 meter, width of 32 meters and a length of 830 meters. Ore body No. 1 is tabular and in a fissure vein Ore body No. 2 is a breccia fill body. The primary mode of origin was hydrothermal activity. Primary ore control was fracturing. The secondary control was faulting. There is no wallrock alteration. A series of veins of calcite and psilomelane-type material occurs in a wide zone in the andesite. The veins follow individual fractures in a fissure zone that strikes NW, dips NE and is 50 feet wide. Mn oxides are associated with calcite and occur as replacements and fill material in fractures and breccias in andesite. These zones are intruded by a younger porphyritic andesite destroying a part of the ore body. Two NW-trending, tabular zones comprise the Logan Mine. The N zone strikes N70W and is 560 meters long. 80 meters of its strike length is destroyed by intrusion. The S zone strikes N40W and is 490 meters long. 140 meters of its strike length was destroyed by intrusion. The maximum width exposed on the outcrop is 35 meters, averaging 32 meters. The maxiumum thickness exposed is 21 meters, averaging 15 meters in the N zone and 18 meters in the S zone. The calcite is later in origin than the Mn oxide and fills the center of the veins. Some pyrolusite or manganite is present. Local rocks include Tertiary volcanic flow rocks, unit 16 (Northern Mojave Desert).
Workings include unspecified surface openings (the topo map reflects 1 open cast mine symbol labeled "Logan Mine" at this point).
Analytical data results: Average grade is 20% Mn.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Cryptomelane Formula: K(Mn4+7Mn3+)O16 Description: Occurs as fibrous material interlayered with psilomelane. |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Manganite Formula: Mn3+O(OH) |
| ⓘ 'Psilomelane' References: Hewett, Donnel Foster, Fleischer, Michael (1960) Deposits of the manganese oxides. Economic Geology, 55 (1) 1-55 doi:10.2113/gsecongeo.55.1.1p.20 |
| ⓘ Pyrolusite Formula: Mn4+O2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| ⓘ | Cryptomelane | 4.DK.05a | K(Mn4+7Mn3+)O16 |
| ⓘ | Manganite | 4.FD.15 | Mn3+O(OH) |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Manganite | Mn3+O(OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cryptomelane | K(Mn74+Mn3+)O16 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Manganite | Mn3+O(OH) |
| O | ⓘ Pyrolusite | Mn4+O2 |
| K | Potassium | |
| K | ⓘ Cryptomelane | K(Mn74+Mn3+)O16 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Mn | Manganese | |
| Mn | ⓘ Cryptomelane | K(Mn74+Mn3+)O16 |
| Mn | ⓘ Manganite | Mn3+O(OH) |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Fe | Iron | |
| Fe | ⓘ Hematite | Fe2O3 |
Other Databases
| Link to USGS MRDS: | 10033536 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
USA
- California
- San Bernardino County
- Cady MountainsMountain Range
- San Bernardino County
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References
Hewett, Donnel Foster, Fleischer, Michael (1960) Deposits of the manganese oxides. Economic Geology, 55 (1) 1-55 doi:10.2113/gsecongeo.55.1.1p.20
