Hodge Ranch occurrence, Alta, Dutch Flat Mining District (Towle Mining District), Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Hodge Ranch occurrence | Occurrence |
| Alta | - not defined - |
| Dutch Flat Mining District (Towle Mining District) | Mining District |
| Placer County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 13' 36'' North , 120° 48' 25'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Alta | 610 (2011) | 2.3km |
| Dutch Flat | 160 (2011) | 3.5km |
| Washington | 185 (2011) | 14.8km |
| Nevada City | 3,152 (2017) | 18.6km |
| Colfax | 2,005 (2017) | 18.8km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 22km |
A former Cr occurrence/mine located in sec. 25, T16N, R10E, MDM, 2.2 km (1.4 miles) N of Alta, on the NW slope of Spaulding Point, E of the Bear River, on private land within a National Forest area. Owned by J.R. Hodges (1918). Operated by R. E. Linder and J. R. Hodges (1918). MRDS database stated accuracy for this location is 500 meters.
The ore body is lenticular in form. The deposit occurs at the northern end of the easternmost of 3 sub-parallel belts of ultramafic rocks that trend northward across the county. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include underground openings comprised of a 30 foot long adit, a 10 foot raise and a ditch.
Production data are found in: Rynearson, Garn Arthur (1953).
Approximately 40 long tons of ore were shipped in 1917 or 1918 & may have come from the Uvarovite claim (M100378).
Analytical data results: The ore contained 35% Cr2O3
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10043565 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060610449
