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Kelsey Mining District, El Dorado County, California, USAi
| Regional Level Types | |
|---|---|
| Kelsey Mining District | Mining District |
| El Dorado County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~58km
Type:
Kรถppen climate type:
Location: The Kelsey district is in northwestern El Dorado County, 5 miles N of Placerville. It is that portion of the Mother Lode gold belt that extends from the vicinity of the town of Kelsey northwest to Garden Valley.
History: This area was placer-mined soon after James Marshall's gold discovery in 1848 at Coloma, a few miles to the west. The camp was first settled by, and named for Benjamin Kelsey. Marshall spent his last days at Kelsey, and a building on his property once housed a pioneer museum. There was much lode mining from the 1860's through the early 1900's and again in the 1930's. Some intermittent work has been done recently at the Black Oak mine.
Geology and Ore Deposits: A northwest-trending two-mile-wide belt of gray to black slate of the Mariposa Formation (Upper Jurassic) is in the central portion of the district, with greenstone, slate, graphite schist, and quartzite to the west. Amphibolite, slate, and schist lie to the east. Serpentine lenses are also present both to the east and west. The ore deposits occur in quartz veins with numerous stringers. The veins range from one to 10 feet in thickness. Nearly half of the known output of some of the mines has been from small but extremely rich ore shoots. None of the mines has been worked to depths of more than 600 feet.
Mines: Big Four, Big Sandy ($100,000+), Black Oak ($1.2 to 5 million), Gopher Hill, Gray Eagle, Hart, Ida Livingston, Kelsey ($100,000+), Lady Emma, St. Clair, Veerkamp, War Eagle, and Yuba.
History: This area was placer-mined soon after James Marshall's gold discovery in 1848 at Coloma, a few miles to the west. The camp was first settled by, and named for Benjamin Kelsey. Marshall spent his last days at Kelsey, and a building on his property once housed a pioneer museum. There was much lode mining from the 1860's through the early 1900's and again in the 1930's. Some intermittent work has been done recently at the Black Oak mine.
Geology and Ore Deposits: A northwest-trending two-mile-wide belt of gray to black slate of the Mariposa Formation (Upper Jurassic) is in the central portion of the district, with greenstone, slate, graphite schist, and quartzite to the west. Amphibolite, slate, and schist lie to the east. Serpentine lenses are also present both to the east and west. The ore deposits occur in quartz veins with numerous stringers. The veins range from one to 10 feet in thickness. Nearly half of the known output of some of the mines has been from small but extremely rich ore shoots. None of the mines has been worked to depths of more than 600 feet.
Mines: Big Four, Big Sandy ($100,000+), Black Oak ($1.2 to 5 million), Gopher Hill, Gray Eagle, Hart, Ida Livingston, Kelsey ($100,000+), Lady Emma, St. Clair, Veerkamp, War Eagle, and Yuba.
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-localities11 valid minerals.
Detailed Mineral List:
| โ Albite Formula: Na(AlSi3O8) |
| โ Ankerite Formula: Ca(Fe2+,Mg)(CO3)2 |
| โ Calcite Formula: CaCO3 |
| โ Chalcopyrite Formula: CuFeS2 |
| โ 'Feldspar Group' |
| โ Galena Formula: PbS |
| โ Graphite Formula: C Locality: Black Oak Mine [1], Garden Valley, Kelsey Mining District, El Dorado County, California, USA Description: Occurs as graphitic slate. |
| โ Native Gold Formula: Au Localities: Reported from at least 49 localities in this region. |
| โ Pyrite Formula: FeS2 |
| โ Quartz Formula: SiO2 Localities: Reported from at least 44 localities in this region. |
| โ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
| โ Siderite Formula: FeCO3 |
| โ Talc Formula: Mg3Si4O10(OH)2 Localities: Description: Occurs as soapstone and in talcose schist. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| โ | Native Gold | 1.AA.05 | Au |
| โ | Graphite | 1.CB.05a | C |
| Group 2 - Sulphides and Sulfosalts | |||
| โ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| โ | Galena | 2.CD.10 | PbS |
| โ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| โ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| โ | Calcite | 5.AB.05 | CaCO3 |
| โ | Siderite | 5.AB.05 | FeCO3 |
| โ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
| Group 9 - Silicates | |||
| โ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| โ | Albite | 9.FA.35 | Na(AlSi3O8) |
| Unclassified | |||
| โ | 'Feldspar Group' | - | |
| โ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | โ Talc | Mg3Si4O10(OH)2 |
| H | โ Serpentine Subgroup | D3[Si2O5](OH)4 |
| C | Carbon | |
| C | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| C | โ Calcite | CaCO3 |
| C | โ Graphite | C |
| C | โ Siderite | FeCO3 |
| O | Oxygen | |
| O | โ Albite | Na(AlSi3O8) |
| O | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | โ Calcite | CaCO3 |
| O | โ Quartz | SiO2 |
| O | โ Siderite | FeCO3 |
| O | โ Talc | Mg3Si4O10(OH)2 |
| O | โ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Na | Sodium | |
| Na | โ Albite | Na(AlSi3O8) |
| Mg | Magnesium | |
| Mg | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Mg | โ Talc | Mg3Si4O10(OH)2 |
| Al | Aluminium | |
| Al | โ Albite | Na(AlSi3O8) |
| Si | Silicon | |
| Si | โ Albite | Na(AlSi3O8) |
| Si | โ Quartz | SiO2 |
| Si | โ Talc | Mg3Si4O10(OH)2 |
| Si | โ Serpentine Subgroup | D3[Si2O5](OH)4 |
| S | Sulfur | |
| S | โ Chalcopyrite | CuFeS2 |
| S | โ Galena | PbS |
| S | โ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Ca | โ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | โ Chalcopyrite | CuFeS2 |
| Fe | โ Pyrite | FeS2 |
| Fe | โ Siderite | FeCO3 |
| Cu | Copper | |
| Cu | โ Chalcopyrite | CuFeS2 |
| Au | Gold | |
| Au | โ Native Gold | Au |
| Pb | Lead | |
| Pb | โ Galena | PbS |
Localities in this Region
- California
- El Dorado County
- Kelsey Mining District
- ⭔Garden Valley
- Andrew Kennenmouth placer (Andrew Kennenmouth claim)
- Bacchi placer
- Base Bonanza Mine
- Big Four Mine (Golden Oak)
- Black Oak Mine [1]
- Blue Lead Mine
- Buckeye Consolidated placer
- Castile Mine
- Cincinnati Mine [2]
- Coe Hill Mine (Gold Star; Bathurst)
- Davenport Mine
- Defiance placer
- El Dorado Mine (Roosevelt)
- Fairview & Ben Franklin claims
- Hart Mine
- Irish Creek
- Isabel Mine (Isbell Mine)
- John C. Berry claims
- John Tynes pit
- Mountain Boy; Mountain Girl; Mountain Slide and Eastern Star Mine
- Oro Fino Mine
- Oronogo Mine
- Roosevelt placer
- Swip placer
- United Quartz Mine
- Unnamed Au mine [19]
- Unnamed placer Au mine [15] (dredge tailings)
- Veer Kamp Mine (Veerkamp; Gold Coin)
- White Oak placer
- ⭔Kelsey
- ⭔Garden Valley
- Kelsey Mining District
- El Dorado County
- California
- El Dorado County
- Kelsey Mining District
- Kelsey
- Black Hawk Mine
- California-Bangor Slate Company Quarry
- Chaparral Mine (Golden Queen)
- Climax & Independence Mine
- Coleman and Berryman Consolidated Mine (Coleman and Berryman Cons.)
- Columbia Flat placer
- Dalmatia Mine (Kelly Mine; Kelley Mine)
- Doncaster & Cleveland Mine (Cleveland)
- Eureka Mine [3]
- Eureka Slate Quarry (Sierra Slate Corporation Quarry)
- Fairplay Consolidated Mine (Fairplay Cons)
- Gopher-Boulder Mine (Gopher Hill ?)
- Grey Eagle Mine
- Guadalupe Mine
- Ida Livingstone Mine (Ida Livingston Mine)
- Jansen Mine
- Kelsey Mine (Lady)
- Lady Emma Mine (Currie)
- Manzanita Mine
- Old Hickory Mine
- Peterson Mine
- Poor Mine
- Quiggle Mine (Steele and Dryden)
- Red Hill Mine
- Rising Sun Mine (Potter)
- Ryan Mine
- San Francisco Slate Company quarries
- St. Clair Mine
- St. Lawrence Mine (Guadalupe and St. Louis; St. Lawrence No .2; North St. Lawrence)
- Strahle Mine (Strahle claim; Doty claim)
- Sundowner Mine
- Sunrise Mine
- War Eagle Mine
- White Oak occurrence
- Kelsey
- Kelsey Mining District
- El Dorado County
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- California
- Mother Lode BeltBelt
- Sierra NevadaMountain Range
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
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References
Irish Creek, Garden Valley, Kelsey Mining District, El Dorado County, California, USA