Poker Flat Mining District (Table Rock Mining District), Sierra Co., California, USAi
| Regional Level Types | |
|---|---|
| Poker Flat Mining District (Table Rock Mining District) | Mining District |
| Sierra Co. | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 41' 35'' North , 120° 50' 44'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
NOTE: There is no file for this district in the USGS MRDS database.
Location: This district is in northern Sierra County about 10 miles N of Downieville. It includes the Howland Flat, Table Rock, Deadwood, Mt. Fillmore, Potosi, and Rattlesnake Peak areas. It is mainly a placer-mining district.
History: The streams were first mined during the gold rush. The locality was extremely rich then; in one month gold valued at $700,000 (period values) was produced. Hydraulic mining was done on a major scale from the late 1850's through the 1880's. Some lode mining and drift mining continued through the early 1900's, and the area was prospected in the 1920's and 1930's. The district was made famous by Bret Harte's tale, The Outcasts of Poker Flat. This district has been highly productive, the mines at Howland Flat alone being credited with an output valued at $14 million (period values).
Geology: The northern part of the district is underlain by amphibolite with some serpentine. To the south and east there are slates of the Blue Canyon Formation (Carboniferous). Substantial portions of the area are capped by andesite. Extensive deposits of Tertiary auriferous quartz gravels are part of the Port Wine channel, which extends W & NW through this district and then W and SW into the Port Wine district. The lower quartz-rich gravels were also gold-rich. Portions of the channel have been faulted. Some narrow gold-quartz veins occur in amphibolite and slate.
Mines: Placer: Caledonia, California, Clippership, Deadwood, Forest Queen, Gibraltar, Hawkeye, Herlamer and Bunker Hill, Manchester, Miners Home, Pacific, Poker Flat, Potosi, Rattlesnake, Scott, Virginia, Tennessee, Winkeye. Lode: Alhambra, Mammoth, Mt. Fillmore Consolidated, New York.
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-localities6 valid minerals.
Detailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| ⓘ Galena Formula: PbS Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| ⓘ Gold Formula: Au Localities: Reported from at least 25 localities in this region. Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| ⓘ 'Margarodite' Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 275. |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Reference: MacBoyle, Errol (1920b), Mines and mineral resources of Sierra County: California Mining Bureau Report 16, 144 pp. (published as separate chapter): 75; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 427. |
| ⓘ Muscovite var. Mariposite Formula: K(Al,Cr)2(Al,Si)4O10(OH)2 Reference: MacBoyle, Errol (1920b), Mines and mineral resources of Sierra County: California Mining Bureau Report 16, 144 pp. (published as separate chapter): 75; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 427. |
| ⓘ Muscovite var. Phengite Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 Reference: MacBoyle, Errol (1920b), Mines and mineral resources of Sierra County: California Mining Bureau Report 16, 144 pp. (published as separate chapter): 75; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 427. |
| ⓘ Pyrite Formula: FeS2 Localities: Lassiat claim, Poker Flat, Poker Flat Mining District (Table Rock Mining District), Sierra Co., California, USA Mount Filmore Consolidated Group Mine (Mount Filmore Cons. Grp.; Mt Fillmore Cons Group; Sunnyside claim; Blue Jay claim; Rattlesnake No. 1 & No. 2 claims), Mount Fillmore, Poker Flat Mining District (Table Rock Mining District), Sierra Co., California, USA New York Mine, Poker Flat, Poker Flat Mining District (Table Rock Mining District), Sierra Co., California, USA Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| ⓘ Quartz Formula: SiO2 Localities: Reported from at least 12 localities in this region. Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10086557. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Mariposite | 9.EC.15 | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| ⓘ | var. Phengite | 9.EC.15 | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Margarodite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| O | Oxygen | |
| O | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Galena | PbS |
| K | Potassium | |
| K | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Cr | Chromium | |
| Cr | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Turner, Henry Ward (1897), Description of the gold belt: description of the Downieville sheet: USGS Geol. Atlas Downieville folio (Folio No. 37), 8 pp.
Lindgren, Waldemar (1911), The Tertiary gravels of the Sierra Nevada of California: USGS Professional Paper 73, 226 pp.: 108-109.
MacBoyle, Errol (1920b), Sierra County, Poker Flat district, California Mining Bureau. Report 16, 144 pp.: 15-19.
Logan, Clarence August (1924), Nevada County, Gravel mines of Howland Flat Ridge, California Mining Bureau (Report 20): 362-367.
Logan, Clarence August (1929), Sierra County: placer mines: California Division of Mines (Report 25): 184-211.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 545.
Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193: 108-109.
Localities in this Region
- California
- Sierra Co.
- Poker Flat Mining District (Table Rock Mining District)
- Bunker Hill
- Deadwood
- Howland Flat
- Diana Mining Company placer prospect
- Faith claim (Wehrle claim)
- Hayes placer prospect
- Last Chance placer prospect
- Midas placer prospect
- Miners Home prospect (Hawkeye Mine; Union)
- Pennsylvania placer prospect
- Syndicate Mine
- Table Rock
- Unidentified Au mine [45]
- Unidentified Au mine [46]
- Unidentified Au mine [47]
- Unidentified Au mine [56]
- Virginia & Lincoln Mine (Virginia & Linclon; Virginia Mine)
- Winkeye Placer prospect (Winkeye)
- Mount Fillmore
- Poker Flat Mining District (Table Rock Mining District)
- Sierra Co.
- California
- Sierra Co.
- Poker Flat Mining District (Table Rock Mining District)
- Mount Fillmore
- Flanagan placer prospect (Helena)
- Golden Link prospect
- Gourley occurrence
- IXL group
- Kosmos & Keystone Extension placer prospect
- Mount Filmore Consolidated Group Mine (Mount Filmore Cons. Grp.; Mt Fillmore Cons Group; Sunnyside claim; Blue Jay claim; Rattlesnake No. 1 & No. 2 claims)
- Unidentified Au prospect [37]
- Unidentified Au prospect [43]
- Poker Flat
- Potosi
- Rattlesnake Peak
- Tennessee Mountain
- Mount Fillmore
- Poker Flat Mining District (Table Rock Mining District)
- Sierra Co.
Other Regions, Features and Areas containing this locality
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