Seven Troughs Project

Site Name

Primary: Seven Troughs Project
Secondary: Mazuma Hills Mine
Secondary: Kindergarten
Secondary: Coalition Mine
Secondary: Badger Mine

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Commodity

Primary: Gold
Secondary: Silver

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Location

State: Nevada
County: Pershing
District: Seven Troughs 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: Victoria Resource Corporation
Info Year: 2006

Owner Name: Newmont Gold Corp
Info Year: 2006

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: breccia zones, fissures
Operation Type: Underground
Year First Production: 1907
Discovery Year: 1905
Years of Production:
Organization:
Significant: Y
Deposit Size: M

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Physiography

Not available

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Mineral Deposit Model

Model Name: Epithermal vein, Comstock

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Orebody

Form: tabular to irregular

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Structure

Type: L
Description: fissure, breccia zone

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Alterations

Not available

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Rocks

Name: Basalt
Role: Associated
Age Type: Associated Rock
Age Young: Tertiary

Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Tertiary

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Tertiary

Name: Granodiorite
Role: Associated
Age Type: Associated Rock
Age Young: Tertiary

Name: Slate
Role: Host
Age Type: Host Rock
Age Young: Jurassic

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Analytical Data

Not available

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Materials

Ore: Gold
Ore: Electrum
Gangue: Quartz

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Comments

Comment (Deposit): Most of the district mineralization is covered by post-mineral volcanics; the auriferous volcanic-hosted quartz-adularia veins were mined where exposed. Free gold occurs in quartz and breccia; some silver is alloyed with gold. The district is underlain by mid-Miocene-age basalt and rhyolite which have been cut by northerly, northwesterly and northeasterly structures which form a complex zone of horst and graben blocks. An area approximately 5 miles long and 2.5 miles wide has been variably altered by shallow level hydrothermal solutions within which gold and silver mineralization is hosted in banded quartz veins as well as in sheared gouge zones. The historical mining exploited spotty but very high-grade orebodies primarily in two areas at the Coalition and Fairview mines. Quincy?s Seven Troughs program was designed to test the strike and dip extensions of the bonanza gold veins, and drill holes to explore the down-dropped block between the Coalition Mine and the Badger Mine.

Comment (Commodity): Ore Materials: gold, electrum

Comment (Commodity): Gangue Materials: quartz

Comment (Development): Historic production in the district from 1907-1955 was 158,468 ounces of gold and 995,876 ounces of silver grading 35.6 g/t gold and 223.9 g/t silver. Most of the district is covered by post-mineral volcanics and the auriferous volcanic-hosted quartz-adularia veins were mined where exposed. Newmont owns the property, and Quincy Gold Corp optioned it from Newmont in 2004 and began a driling program in 2005 Victoria Resources also leased the property in 2006 and plans to drill. Victoria considers the district to have potential below this layer. Lease conditions stipulate work commitments of $2.6 million over seven years for Seven Troughs.

Comment (Economic Factors): Production in the Seven Troughs District from 1907-1955 was 158,468 ounces of gold and 995,876 ounces of silver from ore grading 35.6 g/t gold and 223.9 g/t silver

Comment (Identification): This record includes all material from MRDS record W002895 for the Seven Troughs District as well as other district properties and new material on the current prospects.

Comment (Location): The Seven Troughs Project consistis of 103 patented and 246 unpatented claims in the area of the Seven Troughs Mining District.

Comment (Geology): Veins are narrow, composed of friable quartz and shattered country rock.

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References

Reference (Deposit): Stuart, E., 1909, Nevada's Mineral Resources, Carson City, P. 121-2

Reference (Deposit): Lincoln, F. C., 1923, Mining Dist. of Nev.: Reno, Nev. Newsletter Pub.

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): Quincy Gold Corp. press release, 4/13/05.

Reference (Deposit): NBMG MI-2004.

Reference (Deposit): Ransome, F, 1909, Geology and Ore Deposits of Goldfield, Nev.: USGS Prof. Paper 66, P. 16-25

Reference (Deposit): Koschmann, A. H. and Bergendahl, M., 1968, Principal Gold Producing Districts of the U.S.: USGS Prof. Paper 610, p. 196.

Reference (Deposit): Hill, J. M., 1912, Mining Districts of the Western U.S.: USGS Bull. 507, p. 214

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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.