Harrison Mine (New England Mine; Grizzly Mine; January Mine; Ruby Mine), Knoxville area, Knoxville Mining District, Coast Ranges, Yolo County, California, USAi
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Latitude & Longitude (WGS84):
38° 51' 5'' North , 122° 22' 26'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Guinda | 254 (2011) | 15.8km |
| Hidden Valley Lake | 5,579 (2011) | 16.7km |
| Lower Lake | 1,294 (2011) | 21.5km |
| Middletown | 1,323 (2011) | 23.6km |
| Clearlake | 15,182 (2017) | 24.9km |
Mindat Locality ID:
98480
Long-form identifier:
mindat:1:2:98480:2
GUID (UUID V4):
44ddd894-e5b1-4ddd-815c-3d4b98df01dd
A former Hg mine located in secs. 26 & 35, T12N, R5W, MDM, 4.0 km (2.5 miles) NW of Knoxville (Napa County) and 1 mile S of the Reed Mine. Discovered in 1868. First production was 1917. Production years included 1917-1918,, 1937-1945. Owned by V. W. Harrison and others. MRDS database stated accuracy for this location is 100 meters.
Mineralization is Pliocene in age and is hosted in Late Jurassic serpentinite. The ore body strikes N42W and dips NE at a width of 4.57 meters and a length of 15.24 meters. Controls for ore emplacement included a broad NW-trending fault zone. Franciscan sediments and serpentine constitute the major rocks of the district while Knoxville strata occur E of the ore district. These are overlain by Pleiocene- Pleistocene Sonoma volcanics, which are rhyolitic tuffs and agglomerates of basalt andesite and rhyolite. Prior to the Upper Pleiocene, the rocks were folded and faulted, giving major NW structural trends. Many of the Hg deposits occur along the flanks of a major anticline. The sediments have been hydrothermally bleached and kaolinized while the serpentine has undergone silica-carbonation. Ore bodies include those in silica carbonate rock (most abundant), bodies along faults in Franciscan sandstone, occurrences along contacts with basalt dikes, and bodies in brecciated chert. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).
Local structures include a serpentine - Knoxville Fault contact.
Workings include underground openings with a length of 249.94 meters and an overall depth of 38.1 meters. Most of the workings are now inaccessible.
Production data are found in: U.S. Bureau of Mines file data.
Analytical data results: Assays ran to 4 pounds/ton maximum (DMEA report).
Production results: Year: 1962: Hg, estimated accuracy of ^61 pounds Hg/ton (22,560 grams/metric ton).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Calcite Formula: CaCO3 |
| β Cinnabar Formula: HgS Description: Occurs with petroleum and sulphur in decomposed serpentine; as crystals in opalite. References: |
| β Hercynite Formula: Fe2+Al2O4 |
| β Hercynite var. Picotite Formula: (Fe,Mg)(Al,Cr)2O4 |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β 'Opalite' |
| β 'Petroleum' |
| β Pyrite Formula: FeS2 |
| β Sulphur Formula: S8 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Sulphur | 1.CC.05 | S8 |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Cinnabar | 2.CD.15a | HgS |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Hercynite | 4.BB.05 | Fe2+Al2O4 |
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| β | Hercynite var. Picotite | 4.BB.05 | (Fe,Mg)(Al,Cr)2O4 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| Unclassified | |||
| β | 'Opalite' | - | |
| β | 'Petroleum' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Calcite | CaCO3 |
| O | β Hercynite | Fe2+Al2O4 |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Hercynite var. Picotite | (Fe,Mg)(Al,Cr)2O4 |
| Mg | Magnesium | |
| Mg | β Hercynite var. Picotite | (Fe,Mg)(Al,Cr)2O4 |
| Al | Aluminium | |
| Al | β Hercynite | Fe2+Al2O4 |
| Al | β Hercynite var. Picotite | (Fe,Mg)(Al,Cr)2O4 |
| S | Sulfur | |
| S | β Cinnabar | HgS |
| S | β Pyrite | FeS2 |
| S | β Sulphur | S8 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Cr | Chromium | |
| Cr | β Hercynite var. Picotite | (Fe,Mg)(Al,Cr)2O4 |
| Fe | Iron | |
| Fe | β Hercynite | Fe2+Al2O4 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Fe | β Pyrite | FeS2 |
| Fe | β Hercynite var. Picotite | (Fe,Mg)(Al,Cr)2O4 |
| Hg | Mercury | |
| Hg | β Cinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10040775 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Franciscan DomainDomain
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0061130020
