Blackhawk District (Silver Reef District), San Bernardino County, California, USAi
| Regional Level Types | |
|---|---|
| Blackhawk District (Silver Reef District) | Mining District |
| San Bernardino County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
34° 20' 13'' North , 116° 50' 3'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
A Ag-Au-Cu-Pb-Mn-Dolomite-Limestone mining area.
NOTE: The geographic coordinates presented are arbitrary and were selected as a point in the approximate center of the district.
Location and History: This district is in southwestern San Bernardino County about 30 miles NE of San Bernardino on the N side of the San Bernardino Mountains. It adjoins the Bear Valley District on the E. It also has been known as the Silver Reef district. The district was organized in 1870. An English concern organized the Santa Fe group in 1890 to work the area on a large scale, but work stopped soon afterward and prospecting was minor during the early 1900's. The Santa Fe group was reopened in 1921 and operated continuously until 1940. In this last operation, the production amounted to $300,000 (period values).
Geology and Ore Deposits: The area is underlain by granitic rocks, mica schist, gneiss, and a limestone belt. A mineralized zone known as the Arlington-Santa Fe lode occurs in a thrust fault that strikes W and dips N. The ore consists of hematite-bearing gouge and a limestone breccia. Several ore bodies yielded up to 1 ounce of gold per ton. The ore zones arc up to 75 feet thick and 1000 feet long. Much of
the output in the district has come from the Santa Fe groups.
NOTE: The geographic coordinates presented are arbitrary and were selected as a point in the approximate center of the district.
Location and History: This district is in southwestern San Bernardino County about 30 miles NE of San Bernardino on the N side of the San Bernardino Mountains. It adjoins the Bear Valley District on the E. It also has been known as the Silver Reef district. The district was organized in 1870. An English concern organized the Santa Fe group in 1890 to work the area on a large scale, but work stopped soon afterward and prospecting was minor during the early 1900's. The Santa Fe group was reopened in 1921 and operated continuously until 1940. In this last operation, the production amounted to $300,000 (period values).
Geology and Ore Deposits: The area is underlain by granitic rocks, mica schist, gneiss, and a limestone belt. A mineralized zone known as the Arlington-Santa Fe lode occurs in a thrust fault that strikes W and dips N. The ore consists of hematite-bearing gouge and a limestone breccia. Several ore bodies yielded up to 1 ounce of gold per ton. The ore zones arc up to 75 feet thick and 1000 feet long. Much of
the output in the district has come from the Santa Fe groups.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities12 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Bromargyrite | 3.AA.15 | AgBr |
| ⓘ | Chlorargyrite | 3.AA.15 | AgCl |
| ⓘ | var. Bromine-bearing Chlorargyrite | 3.AA.15 | Ag(Cl,Br) |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| ⓘ | Cerussite | 5.AB.15 | PbCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Wulfenite | 7.GA.05 | Pb(MoO4) |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Cerussite | PbCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cerussite | PbCO3 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Wulfenite | Pb(MoO4) |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Cl | Chlorine | |
| Cl | ⓘ Chlorargyrite | AgCl |
| Cl | ⓘ Chlorargyrite var. Bromine-bearing Chlorargyrite | Ag(Cl,Br) |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Br | Bromine | |
| Br | ⓘ Bromargyrite | AgBr |
| Br | ⓘ Chlorargyrite var. Bromine-bearing Chlorargyrite | Ag(Cl,Br) |
| Mo | Molybdenum | |
| Mo | ⓘ Wulfenite | Pb(MoO4) |
| Ag | Silver | |
| Ag | ⓘ Bromargyrite | AgBr |
| Ag | ⓘ Chlorargyrite | AgCl |
| Ag | ⓘ Chlorargyrite var. Bromine-bearing Chlorargyrite | Ag(Cl,Br) |
| Pb | Lead | |
| Pb | ⓘ Cerussite | PbCO3 |
| Pb | ⓘ Galena | PbS |
| Pb | ⓘ Wulfenite | Pb(MoO4) |
Localities in this Region
- California
- San Bernardino County
- California
- San Bernardino County
- Blackhawk District (Silver Reef District)
- San Bernardino County
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
USA
- California
- San Bernardino MountainsMountain Range
- Mojave DesertDesert
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