Pinson Gold Mine

Producer in Humboldt county in Nevada, United States with commodities Gold, Silver, Tungsten

Geologic information

Identification information

Deposit ID 10310313
MRDS ID M232744
Record type Site
Current site name Pinson Gold Mine
Alternate or previous names Ogee and Pinson Mine, A Zone, B Zone, C Zone, CX, CX West, Felix Canyon, Mag, Blue Bell
Related records 10045085, 10149740

Comments on the site identification

  • This record is an update of earlier record #M232744 for the same deposit from which all material has been extracted and incorporated into the current record.

Geographic coordinates

Geographic coordinates: -117.26902, 41.12989 (WGS84)
Elevation 1660
Relative position The Pinson Mine is located 38 miles northeast of Winnemucca, Nevada.
(click for info)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 038N 042E 32 Nevada

Comments on the location information

  • The Pinson Mine is located on the south side of Granite Creek, on the eastern flank of Adam Peak in the Osgood Mountains.


Commodity Importance
Gold Primary
Silver Secondary
Tungsten Tertiary

Comments on the commodity information

  • Ore Materials: gold
  • Gangue Materials: quartz, chiastolite/andalusite, cordierite, fluorite, barite kaolinite.

Materials information

Materials Type of material
Gold Ore
Quartz Gangue
Chiastolite Gangue
Andalusite Gangue
Cordierite Gangue
Fluorite Gangue
Barite Gangue
Kaolinite Gangue

Mineral occurrence model information

Model code 173
USGS model code 26a.1
Deposit model name Sediment-hosted Au
Mark3 model number 17

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite
    Rock unit name Comus Formation
    Stratigraphic age (youngest) Middle Ordovician
    Stratigraphic age (oldest) Late Cambrian
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
    Rock type qualifier cherty, silicified
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
    Rock unit name Preble Formation
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (oldest) Middle Cambrian
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Rock type qualifier granodiorite
    Rock unit name Osgood Mountains Stock
    Stratigraphic age (youngest) Cretaceous

Nearby scientific data

(1) -117.26902, 41.12989

Ore body information

  • General form Irregular to tabular, in fault zone

Controls for ore emplacement

  • The ore-controlling fault zone at Pinson maybe a southern extension of the Getchell Fault.

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1945
Discoverer Clovis Pinson
Year of first production 1949

Mining district

District name Potosi District
District name Getchell District

Land status

Ownership category BLM Administrative Area
Area name Winnemucca BLM Administrative District

Ownership information

  • Type Owner-Operator
    Owner Pinson Mining Co.
    Year 2004

Comments on other economic factors

  • Pinson reserves in 1980 were reported to be 3.245 million tons of ore grading 0.119 ounces of gold per ton. 1989 remaining reserves, including the Mag pit, were 480,000 ounces of gold. 1996 reserves for the combined mines of the Potosi district were reported as 2.6 million tons of ore grading 0.072 ounces of gold per ton. New Pinson Mine production was as follows: 1980: 56,000 ounces of gold. 1986?88: 189,864 ounces of gold. 1989: 72,489 ounces of gold.(includes Preble) 1990?91: 112,022 ounces of gold. 1992?94: 145,210 ounces of gold and 12,700 ounces of silver 1995: 44,854 ounces of gold. 1996?98: 128,935 ounces of gold and 7,990 ounces of silver 1999: 11,975 ounces of gold and 442 ounces of silver 2000: 1,116 ounces of gold and 31 ounces of silver 2001: 679 ounces of gold In 2006, the underground resource reported by Atna was 1,760,000 tons grading 0.302 ounces of gold per ton measured+indicated)

Comments on development

  • The original claims were staked by Clovis Pinson in 1945, and were held in the family through 1979. It was mined in 1949 by open pit methods. The new Pinson Deposit was discovered on leased claims in 1971 by John Livermore and Pete Galli of Cordex. The Pinson Mine was put in production in 1980 as an open pit mine and conventional gold mill processing approximately 300,000 tons ore per year. 1979 known reserves of medium grade ore were sufficent for five years' operations, with additional reserves of low-grade to extend mine life to 10 yr or more. In 1980 a heap leach operation was commenced to recover gold from 3,000, 000 tons of lower-grade ore. The mine was active in 1980, employing about 80 persons. The new Pinson Deposit was discovered in 1971 by John Livermore and Pete Galli. Known reserves in 1979 were 1.5 million tons plus more low grade ore. It was owned and operated in 1981 by Cordilleran Exploration (Cordex). It was listed as an active open pit mine and mill with cyanidation operation in 1983, employing a total of 130 persons. The property position was later consolidated with the Preble Mine to the south. The Preble-Pinson property is made up of 17 complete and 8 partial sections (approximately 20 square miles or 5,300 hectares) of the railroad checkerboard, covering much of the projected intersection zone where the Battle Mountain Gold Belt crosses the Getchell Gold Belt in portions of the Edna Mountain and Osgood Mountains areas. Portions of the property occur about 1 mile south of the Pinson Mine and about 1.3 miles NNE of the Preble mine. These two mines occur along the NNE trend of the Getchell Gold Belt. The southeast corner of the property is approximately 6 miles NW of the Lone Tree Mine, which occurs within the Battle Mountain Gold Belt. Preliminary work indicates that the main intersection zone is buried under basalt. Therefore some initial work closer to existing or abandoned mines will be undertaken such that the structural geometries within the Battle Mountain Gold Belt will provide convergence zones extrapolated below the basalts for future drilling. Early in 1997, Homestake Mining Co. and Barrick Gold Corp. purchased the interests in the Pinson property not already owned by them, to increase their ownership of the property to 50% each, with Homestake as the manager. Deep exploration potential was the reason for the purchase. By the end of the year, Barrick Gold Corp. announced that production was expected to wind down at Pinson by mid-year 1999 unless current exploration on the property succeeds in identifying new reserves. Reported 1997 production from the Pinson Mine was 51,600 oz of gold (DMR, 2/26/97; Homestake Mining Co. press release, 2/19/98; Humboldt Sun, 9/15/97; In 1999, At Homestake Mining Co.?s Pinson Mine, which was closed in January 1999, work is ongoing to recontour, cover, and revegetate the waste rock piles and tailings facility, and to neutralize the leach pads. Residual heap leach production continued throughout most of 1999. An exploration program with joint venture partner Barrick Gold Corp. will continue. The partners expect to spend approximately $3 million exploring for deep orebodies on the lands controlled by the Pinson joint venture (Yahoo Mining/Metals News, 1/29/99, 7/27/1999). Also in the Potosi district, Western Exploration recorded the BU Claims in T38N, R42E, (BLM mining claim records, 4/19/1999). In 2000, Homestake Mining was planning to test potential deep high-grade targets at the Pinson property while concurrent reclamation was ongoing. In 2003, Victoria Resource Corp. acquired the Preble-Pinson property as a lease of all of Newmont?s mineral interests in parts or all of approximately 24 square miles of the checkerboard property in the Edna and Osgood mountains.
  • In 2005, Atna Resources began exploring the underground potential of a high-grade ore zone with a drift in the bottom of the Pinson open pit. In 2006, Atna Resources Ltd.(70%) announced that recent underground drill results at the Pinson/Ogee Zone Project include 10.5-15.8 feet @ 0.616 opt Au (UGOG-006); 47.5- 51.5 feet @ 0.260 opt Au (UGOG-008); 55.5-62 feet @ 0.115 opt Au (UGOG-013); 86.8-107.5 feet @ 0.454 opt Au (UGOG-013); 213-227 feet @ 0.549 opt Au (UGOG-013); 247.5-263.5 feet @ 0.289 opt Au (UGOG-014) and 74- 135.5 feet @ 0.505 opt Au (UGOG-015).

Reference information

Bibliographic references

  • Deposit

    Willden, R., 1964, Geology and Mineral Deposits of Humboldt County, Nev; Nev. Bur. Mines Bull. 59.

  • Deposit

    Hotz, P.E., and Willden, R., 1964, Geology and Mineral Deposits of the Osgood Mountains Quadrangle Humboldt County, Nev; U.S.G.S. Prof. Paper 431.

  • Deposit

    Nev. Mining Assoc. Bull., Sept. 1979; "Consortium Budgets $14 Million to open Pinson Gold Mine."

  • Deposit

    The Northern Miner Newspaper, 1980 (Nov.20), Rayrock prepares Pinson for January set-up.

  • Deposit

    Nevada State Inspector of Mines, 1981, Directory of Nevada Mine Operations active during 1980.

  • Deposit

    Powers, S.L., 1978, MS Thesis, UNR, Reno, NV.

  • Deposit

    Geologic Society of Nevada, 1984 Meeting and Field Trip Road Log Pinson Mine, Florida Canyon Deposit, Rochester District, Relief Canyon Deposit, Sept. 21023, 1984. (contains numerous other unpublished references)

  • Deposit

    Bonham, H.F., 1986, NBMG Map 91.

  • Deposit

    Bonham, H.F., 1988, in NBMG MI-1987.

  • Deposit

    NBMG, 1994, MI-1993

  • Deposit

    Nevada Division of Minerals, 1994

  • Deposit

    Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States; Part A, Database description and analysis; part B, Digital database: U.S. Geological Survey Open-File Report 98-206, 33 p., one 3.5 inch diskette.

  • Deposit

    Foster, Joseph M

  • Deposit

    Kretschmer, Edward L., 1990,Geology of the Mag Deposit, Pinson Mine, Humboldt County, Nevada; Geology and ore deposits of the Great Basin; program with abstracts.

  • Deposit

    Victoria Resource Corp. press release, 1/21/2003

  • Deposit

    NBMG MI-2003

  • Deposit

  • Deposit, 9/11/2000.

  • Deposit

    Atna 2006 press release.

General comments

Subject category Comment text
Deposit A 1984 report describes the deposit: the Pinson "A" zone is 1000 feet long by 60 feet thick containing 1,500,000 tons of ore averaging 0.18 ounces per ton gold, covered by 10-50 feet of alluvium. Further drilling indicated 1,700,000 tons averaging 0.15 ounces per ton gold, plus an additional tonnage of low-grade ore in the B zone in the vicinity of the old pit. A major NE-striking fault zone 50-70 feet wide, dipping 40-50 SE controls gold mineralization. It has been traced by drilling for 8,000 feet. The "A" orebody is localized by this shear zone where it coincides with the contact between the Preble and Comus Formations. It consists of fine disseminations in jasperoid. There are irregular zones of low-grade gold ore along bedding planes and minor fractures in argillite in the footwall of the ore-controlling fault. A conspicuous contact metamorphic aureole surrounds the granodiorite stock, extending irregularly up to 10,000 feet out from the margins of the intrusive. A number of tungsten-bearing tactite deposits rim the granodiorite, forming wherever a calcareous bed was present within the contact zone. The Pinson Mine also lies within this contact aureole, with granodiorite outcropping 1200 feet north of the mine. At Pinson gold occurs in fractures that cut calc-silicate rocks of the Comus Formation.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-2005 LaPointe, D.D. Nevada Bureau of Mines and Geology
Editor 01-SEP-2007 Schruben, Paul G. U.S. Geological Survey Converted from S&A FileMaker format to Oracle. Edit checks on rocks, units, and ages with Geolex search, and other fields.