Iowa Hill District

Placer County, California, United States

Gold Platinum Silver

Land & claims · BLM · live

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BLM MLRS ↗Claims at this point ↗Surface mgmt ↗

Surface manager + active mining claims at this point, live from BLM. The "open to location" notes are a general 1872-Mining-Law guide, not BLM output — decision-support only; verify with BLM MLRS and on the ground before staking or entry.

Commodities

PrimaryGold

SecondaryPlatinum, Silver

Commodity typeMetallic

Deposit

Deposit typeStream placer

Model119: Placer Au-PGE

Orebody formIrregular

Ore controlMechanical accumulation on irregular bedrock riffles and within river- and stream-channel lag gravels, bars, and point bar deposits

Materials

Ore mineralsGold

GangueQuartz, Magnetite, Ilmenite, Zircon, Pyrite, Amphibole, Epidote, Chlorite, Siderite

Geology

Host rockSand and Gravel

StructureForest Hill Fault, Melones Fault Zone, Gills Hill Fault, Forest Hill Fault, Melones Fault Zone

Tectonic settingMagmatic arc

Economic & production

Development statusPast Producer

Discovery year1853

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References

Chandra, D.K., 1961, Geology and mineral deposits of the Colfax and Foresthill quadrangles: California Division of Mines Special Report 67, 50 p.Clark, W.B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 67-69.Hobson, J.B., 1890, Iowa Hill mining district: California State Mining Bureau report 10, p. 419-425.Jarman, A., 1927, Iowa Hill: California State Mining Bureau Report 23, p. 86-87.Irelan, W., Jr., 1888, Placer County: California State Mining Bureau Report 8.Lindgren, W., 1900, Colfax Folio: U.S. Geological Survey Atlas of the U.S., Folio 66, 10 p.Lindgren, W., 1911, Tertiary gravels of the Sierra Nevada: U.S. Geological Survey Professional Paper 73, p. 148-149.Logan, C.A., 1936, Gold mines of Placer County: Big Dipper, Morning Star and Succor Flat Channel mines: California Division of Mines Report 32, p. 52-54, 65-66, and 79.Saucedo, G. J. and Wagner, D. L., 1992, Geologic map of the Chico Quadrangle: California Division of Mines and Geology Regional Map Series Map No. 7A, scale 1:250,000.Waring, C.A., 1919, Placer County: Iowa Hill District: California State Mining Bureau Report 16, p. 38.

Identification

Deposit ID10310631

RegionNA

Data scoreA

Coordinates39.10809, -120.86033