Golconda Mining District

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Golconda Mining District outline from USMIN location polygon NV00142.
Identified resources Historical production of manganese and tungsten.
Production Three carloads of Mn ore produced in 1893 and one more in 1918. 83,739 units of WO3 were produced in the 1940s at a grade of 0.8 to 1.3% WO3.
Status Past mining.
Estimated resources Unknown.
Geologic maps Erickson and Marsh (1974), scale 1:24,000; Bateman (1953), scale 1:2,400.
Geophysical data Inadequate Rank 4 aeromagnetic and Rank 5 aeroradiometric coverage.
Favorable rocks and structures Lenticular deposited interbedded in soft buff calcareous tufa containing fragments of sandstone, shale, and limestone. The black ore bed is up to 3.5 feet thick. Local Mn-rich spring water provided Mn which formed by precipitation from super-saturated brines of Pleistocene Lake Lahotan.
Deposits Golconda tungsten mine (MRDS dep_id: 10043948).
Evidence from mineral occurrences MRDS.
Geochemical evidence Geochemical map showing the distribution and abundance of Sb and W, Golconda and Iron Point quadrangles (Erickson and Marsh, 1971). Hot springs contains up to 60 ppm Be (16 ppm BeO) (Warner and others, 1959).
Geophysical evidence Aeromagnetic contours, Golconda and Iron Point quadrangles (Erickson and Marsh, 1971).
Evidence from other sources Unknown.
Comments Hot-spring Mn-Fe calcareous tufa deposit formed by precipitation of supersaturated brines of Pleistocene Lake Lahontan. Veins below the blanket deposit may represent source of ore minerals. Tungsten-bearing ferruginous and locally manganiferous clayey gravels rest on steeply-dipping Cambrian rocks.
Cover thickness and description Exposed at the surface.
Authors David A. Ponce, Jane M. Hammarstrom.
New data needs Geologic mapping, geophysics.
Geologic mapping and modeling needs Updated geologic mapping.
Geophysical survey and modeling needs High-resolution, Rank 1 aeromagnetic and radiometric surveys.
Digital elevation data needs Lidar inadequate.