Bruner Gold Deposit

Site Name

Primary: Bruner Gold Deposit
Secondary: Phonolite
Secondary: Silent Friend Group
Secondary: Lucky Tiger Claim
Secondary: Annex Extension Claim
Secondary: Bruner Mine
Secondary: Aure Claim
Secondary: Derelict
Secondary: Duluth
Secondary: Paymaster Zones
Secondary: Golden Eagle Mine
Secondary: Penelas Mine

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Commodity

Primary: Gold

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Location

State: Nevada
County: Nye
District: Bruner District

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Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

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Holdings

Not available

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Workings

Not available

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Ownership

Owner Name: American International Ventures, Inc.
Info Year: 2004

Owner Name: Patriot Gold Corp.
Info Year: 2004

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: vein epithermal; breccia filling
Operation Type: Surface-Underground
Year First Production: 1906
Year Last Production: 1986
Years of Production:
Organization:
Significant: Y
Deposit Size: S

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Physiography

Not available

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Mineral Deposit Model

Model Name: Epithermal vein, Sado

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Orebody

Form: tabular

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Structure

Type: R
Description: The Bruner District is situated in the Walker Lane, a broad northwest trending structural belt that hosts many producing mines.

Type: L
Description: Flow banding in rhyolite is parallel to crushed breccia zone at one place.

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Alterations

Not available

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Rocks

Name: Andesite
Role: Host
Age Type: Host Rock
Age in Years: 19.300000+-
Dating Method: K-Ar
Age Young: Early Miocene

Name: Rhyolite
Role: Host
Description: brecciated
Age Type: Host Rock
Age in Years: 19.300000+-
Dating Method: K-Ar
Age Young: Early Miocene

Name: Porphyry
Role: Host
Description: biotite rhyolite
Age Type: Host Rock
Age in Years: 19.300000+-
Dating Method: K-Ar
Age Young: Early Miocene

Name: Rhyolite
Role: Host
Description: biotite porphyry
Age Type: Host Rock
Age in Years: 19.300000+-
Dating Method: K-Ar
Age Young: Early Miocene

Name: Tuff
Role: Host
Description: latite to quartz latite
Age Type: Host Rock
Age Young: Tertiary

Name: Quartz Latite
Role: Host
Description: tuff
Age Type: Host Rock
Age Young: Tertiary

Name: Latite
Role: Host
Description: tuff
Age Type: Host Rock
Age Young: Tertiary

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Analytical Data

Not available

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Materials

Ore: Gold
Gangue: Quartz
Gangue: Chalcedony
Gangue: Adularia

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Comments

Comment (Commodity): Ore Materials: native gold

Comment (Commodity): Gangue Materials: comb quartz, chalcedony, adularia

Comment (Location): The Bruner District Mines are situated over about a square mile in the vicinity of the old sites of Phonolite and Penelas, at the extreme north end of the Paradise Range.

Comment (Workings): Old workings consist of two shafts and one adit, as well as several pits, and bulldozer work from more recent exploration activity.

Comment (Economic Factors): From 1936 to 1944 the Bruner Mine produced ore valued at about $70,000. In 1936 the Paymaster zone produced 308 tons valued at $12,272; In 1939 the Derelict zone produced 228 tons of ore yielding 126 ounces of gold and 6074 onces of silver; From 1936 to 1940, the Penelas zone produced 69,001 tons of ore valued at $898,629; There was a small production from 1980 to 1986. In 1992, it was reported that the Duluth Zone contained a geologic resource of 15 million tons of material grading 0.026 opt gold.

Comment (Geology): The Bruner property area is underlain by Tertiary felsic and intermediate composition volcanic and volcaniclastic rocks. Gold mineralization is hosted by a sequence of crystal tuffs that range from latite to quartz latite in composition. The latite is pervasively altered in the central portion of the district, and gold detected in surface sampling and drilling is associated with quartz-adularia alteration. Quartz-adularia veins also occur in the northern and eastern part of the property in a rhyolite porphyry flow-dome that intrudes the volcanic rocks. Narrow very sparse veinlets of comb quartz and chalcedony cut intrusive Tertiary rhyolite. A distinctive light salmon colored chalcedonic vein matter was also noted. Quartz pseudomorphous after lamellar calcite are locally present. Surface mineralization is sparse.

Comment (Identification): This record covers an area which encompasses several mines of the the historic Bruner District Mine described by several earlier MRDS records from which all pertinent material has been incorporated into the current record.

Comment (Development): The Paymaster Mine of the Bruner District had some small production in 1906 and 1919 and was owned in 1922 by the Kansas City-Nevada Consolidated Mines Company, incorporated in 1915, holding 25 patented claims over 487 acres. A 50-ton mill was built at Bruner in 1919 and remodeled in 1921. The company took over the holdings of the Big Henry Gold Mining Co, Phonolite-Paymaster Mining Co, Phonolite- Silent Friend Co, and Duluth Gold Mining Co. The Duluth Mine in the Bruner District was operated in 1936 by Ole Peterson as the Golden Eagle Mine. It is one of several adjoining properties purchased by Kansas City-Nevada Consolidated Mines Co. in 1915. The Paymaster was operated on a small scale as an active open pit gold-silvermine and cyanidization mill from about 1980 through 1986, employing 2-3 persons. During the past 20+ years, several companies have conducted exploration in the Bruner district for volcanic-hosted, bulk-tonnage precious metal mineralization as well as high-grade bonanza-type mineralization. The Bruner property was optioned from Miramar Mining Corp. from about 1988-1991 by Newmont, who did extensive channel sampling and geochemical testing over the old Duluth workings and defined a 2500 ft by 1000-foot NW-trending gold soil anomaly over the old Duluth zone of the Bruner property. They drilled this and five other targets in the area, but dropped their option in 1991. In 1992, Miramar sampled the property and secured an independent contractor who reported that 15 million tons of material grading 0.026 ounces of gold per ton had been outlined. In 1996, it was reported that Newgold had leased the Bruner gold property from Miramar Mining. In 1999, Miramar Gold Corp. still retained an active interest in the Bruner prospect, recording additional claims in the district. Miramar completed an extensive environmental clean up of the property in about 2001. In 2003, Patriot Gold Corp purchased 16 unpatented mining claims of the Bruner property and completed a ground magnetics survey, detailed mapping, and rock chip geochemical sampling of the western portion of the claim block by 2004. Patriot then performed a CSMT geophysical survey to confirm the presence of a major northwest trending structural zone indicated by earlier ground magnetics. Patriot was developing and permitting a drilling plan with hopes of drilling at Bruner in June 2004. Also in 2004, American International Ventures, Inc. (AIVN) announced that it had acquired the Bruner gold property in July 2002 from Miramar Gold Corporation and an affiliated company Orcana Resources, Inc. AIVN owns 28 patented claims totaling 560 acres and 48 unpatented claims totaling 940 acres for a total land position of 1,500 acres in the central Bruner district. AIVN summarized earlier work as geological mapping and sampling, about 1,000 soil geochemistry samples, several hundred rock chip samples from outcrops and underground workings, helicopter-airborne and ground geophysics, and 147 mostly RC drill holes totaling 65,185 feet. Earlier magnetic data shows the major north and northwest structural trends on a contoured plot of the total field data. The mineralized structural trend that hosts the Penelas and Bruner deposits is readily identifiable as a linear magnetic low. Gold mineralization was detected in many of the drill holes, and AIVN completed a program of six diamond core holes in 2004 to follow-up and confirm the results of the previous drilling. The results of the drilling were very encouraging. Gold values greater than 0.02 oz Au/ton were detected in all of the holes, and the results are similar to previous drilling on the property. Higher grade intercepts were present in three of the holes.

Comment (Deposit): The Bruner property area is underlain by Tertiary felsic and intermediate composition volcanic and volcaniclastic rocks. Gold mineralization is hosted by a sequence of crystal tuffs that range from latite to quartz latite in composition. The latite is pervasively altered in the central portion of the district, and gold detected in surface sampling and drilling is associated with quartz-adularia alteration. Quartz-adularia veins also occur in the northern and eastern part of the property in a rhyolite porphyry flow-dome that intrudes the volcanic rocks. Narrow very sparse veinlets of comb quartz and chalcedony cut intrusive Tertiary rhyolite. A distinctive light salmon colored chalcedonic vein matter was also noted. Quartz pseudomorphous after lamellar calcite are locally present. Surface mineralization is sparse. A ground magnetics survey by Patriot Gold Corp. in 2003 indicates the presence of northwesterly and northerly trending faults under the pediment cover that may host gold mineralization. Geologic mapping of rocks exposed in the western portion of the claims show several small quartz bearing structures trending northwest and dipping steeply to the northeast. These small structures are thought to be related to a much larger fault-hosted gold vein system under pediment gravel cover in the eastern portion of the district and extending into the broad valley south of the mapping. In 2004, a CSMT geophysical survey confirmed the presence of a major northwest trending structural zone where ground magnetics had indicated the presence of such a structure under gravel cover. The CSMT survey identified a 500m by 700m area of complex structural intersections in altered and possibly mineralized rocks. Depth of the anomaly is 20 to 100m. Patriot was developing and permitting a drilling plan with hopes of drilling at Bruner in June 2004.

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References

Reference (Deposit): American International Ventures, Inc. website

Reference (Deposit): http://aivnotc.com/Holdings.html
URL: http://aivnotc.com/Holdings.html

Reference (Deposit): Northern Miner, 1993; 12/2/96

Reference (Deposit): Patriot Gold Corp. press releases, 6/27/2003; 11/4/2003)

Reference (Deposit): Patriot Gold Corp. website: http://www.patriotgoldcorp.com
URL: http://www.patriotgoldcorp.com

Reference (Deposit): NBMG MI-2003.

Reference (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.

Reference (Deposit): Miramar Mining Corp, 1992

Reference (Deposit): Garside,L.J.,1981,Field Examination of 06 Aug,1981.

Reference (Deposit): Kleinhampl, F.J. and Ziony, J.I., Geology and Mineral Deposits of Northern Nye Co.: Nev. Bur. of Mines and Geology, Bulletin.

Reference (Deposit): NBMG MI-1984-2004.

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Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.