Round Mountain Gold Mine

Site Name

Primary: Round Mountain Gold Mine
Secondary: Sunnyside Mine
Secondary: Sphinx Glory Hole
Secondary: Great Western Tunnel
Secondary: Rattlesnake
Secondary: Keane Vein
Secondary: Los Gazabo Vein

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Commodity

Primary: Gold
Primary: Silver
Tertiary: Tungsten
Tertiary: Arsenic
Tertiary: Antimony
Tertiary: Thallium
Tertiary: Mercury
Tertiary: Molybdenum
Tertiary: Fluorine-Fluorite
Tertiary: Manganese

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Location

State: Nevada
County: Nye
District: Round Mountain 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

Type: Surface/Underground

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Ownership

Owner Name: Echo Bay Mines Ltd.
Percent: 50.00
Years: 1982 -

Owner Name: Smoky Valley Mining Co. Mr. Chet Diercks, General Manager
Home Office: P.O. Box 480, Smoky Valley Road, Round Mountain, Nv 89045-0480 (702) 377-2366
Years: 1982 -

Owner Name: Homestake Mining Co.
Percent: 25.00
Years: 1992 -

Owner Name: Case, Pomeroy And Co. Ltd.
Percent: 25.00
Years: 1992 -

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1906
Discovery Year: 1906
Years of Production:
Organization:
Significant: N
Deposit Size: M

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Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains

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Mineral Deposit Model

Model Name: Hot-spring Au-Ag

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Orebody

Form: TABULAR, MUSHROOM

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Structure

Type: R
Description: Nw Lineament Seen As Disruption In N-S Trends Of Toquima And Toiyabe Ranges

Type: L
Description: Nw-Striking Faults And Joints; Wnw-Trending Paleotopographic High, May Represent Margin Of Buried Caldera Located Sw Of Round Mountain

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Alterations

Alteration Type: L
Alteration Text: See Comments

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Rocks

Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene

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

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Analytical Data

Analytical Data: REALGAR HAS BEEN REPORTED FROM THE KEANE VEIN. MO AND W VALUES ARE HIGHER IN DEEPER ORES. THERE IS A DECREASE IN CONCENTRATIONS OF AS, SB, AND TL(?) WITH DEPTH. FLUORINE SHOWS CONSISTENT VALUES THROUGHOUT THE MINE AREA WITH NO RECOGNIZED TREND WITH DEPTH. CU, PB, ZN DO NOT APPEAR TO CHANGE WITH DEPTH IN THE DRILL HOLES ANALYZED.

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Materials

Ore: Electrum
Gangue: Montmorillonite
Gangue: Jarosite
Gangue: Sericite
Gangue: Limonite
Gangue: Hematite
Gangue: Realgar
Gangue: Kaolinite
Gangue: Illite
Gangue: Alunite
Gangue: Pyrite
Gangue: Quartz
Gangue: Fluorite

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Comments

Comment (Deposit): Discovery Year: 1864 (SILVER)

Comment (Commodity): DISSEMINATED GOLD IN ALASKITES; MORE GOLD IN QUARTZ; SULFIDES FROM DIORITE?

Comment (Deposit): GOLD DEPOSITS ARE IN QUARTZ LENSES IN THE LIMESTONES AND PROBABLY ARE GENETICALLY RELATED TO THE LATE SILICEOUS PHASE OF THE ALASKITE. NATIVE GOLD IS FINELY DISSEMINATED IN THE QUARTZ AND IS ALSO ASSOCIATED WITH SCATTERED SULFIDES IN THE LENSES.

Comment (Geology): TER-RECENT FAULT ACTIVITY; CRUSHING POST ORE. PLEIST-REC VALLEY FILL.

Comment (Development): ECON.COM: NATIVE GOLD DISSEMINATED IN QUARTZ, MORE GOLD IN GRANITE; MORE AG, PB IN INTRUDED SEDS

Comment (Geology): OLIGO, BASED ON THREE K-AR RADIOMETRIC AGE DATES: 25.2, 0.8 MA (ADULARIA FROM VEINS ON ROUND MOUNTAIN), 25.4, 0.8 MA (SERICITE FROM ALTERED TUFF IN FOOTWALL OF MARIPOSA VEIN), 25.5, 0.8 MA (ALKALI FELDSPAR FROM ALTERED TUFF IN FOOTWALL OF MARIPOSA VEIN).

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References

Reference (Deposit): BERGER, B.R., TINGLEY, J.V., FILIPEK, L.H., AND NEIGHBOR, J., PROCESSES CONTROLLING TRACE-ELEMENT PATTERNS IN HOT SPRINGS-RELATED GOLD-SILVER DEPOSITS IN LATE OLIGOCENE VOLCANIC ROCKS, ROUND MOUNTAIN, NEVADA: UNPUBLISHED REPORT, NEVADA BUREAU OF MINES AND GEOLOGY FILES.

Reference (Deposit): SKILLINGS, D.N., JR., SKILLINGS MINING REVIEW, MARCH 3, 1979, P. 8-17.

Reference (Deposit): SILBERMAN, M.L., SHAWE, D.R., KOSKI, R.A., AND GODDARD, B.B., 1975, K-AR AGES OF MINERALIZATION AT ROUND MOUNTAIN AND MANHATTAN, NYE COUNTY, NEVADA: ISOCHRON WEST, V. NO. 13, P. 1-2.

Reference (Deposit): WALL STREET JOURNAL, 1982, JANUARY 5, 1982, "LOUISIANA LAND BOOSTS ESTIMATES OF GOLD RESERVES."

Reference (Deposit): NEVADA BUREAU OF MINES AND GEOLOGY MI-1987.

Reference (Deposit): GSN PRECIOUS METALS SYMPOSIUM, 1987, FIELDTRIP GUIDEBOOK, P. 130; TECHNICAL VOLUME, P. 375.

Reference (Deposit): MINING JOURNAL, MONTAGU MINING FINANCE, MINING DATABASE, 8/10/91.

Reference (Deposit): TINGLEY, J.V., AND BERGER, B.R., 1985, LODE-GOLD DEPOSITS OF ROUND MOUNTAIN, NEVADA: NEVADA BUREAU OF MINES AND GEOLOGY BULLETIN 100, 62 P.

Reference (Deposit): CAVENDER, W.S., AND PURDY, C.P., 1985, THE MAKING OF THE ROUND MOUNTAIN MINE, IN HOLLISTER, V.F., ED., DISCOVERIES OF EPITHERMAL PRECIOUS METAL DEPOSITS, SOCIETY OF MINING ENGINEERS OF AIME, NEW YORK, P. 101-104.

Reference (Deposit): MILLS, B.A., 1985, GEOLOGY OF THE ROUND MOUNTAIN GOLD DEPOSIT: NYE COUNTY, NEVADA, IN HOLLISTER, V.F., ED., DISCOVERIES OF EPITHERMAL PRECIOUS METAL DEPOSITS, SOCIETY OF MINING ENGINEERS OF AIME, NEW YORK, P. 104-114.

Reference (Deposit): SANDER, M., AND EINAUDI, M., 1987, THE ROUND MOUNTAIN GOLD-SILVER MINE, NYE COUNTY, NEVADA, IN JOHNSON, J., ED., BULK MINEABLE PRECIOUS METAL DEPOSITS-GUIDEBOOK FOR FIELD TRIPS, THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 130-135.

Reference (Deposit): RANSOME, F.L., 1909, ROUND MOUNTAIN: U.S. GEOLOGICAL SURVEY BULLETIN 380, P. 44-47.

Reference (Deposit): SANDER, M., 1988, GEOLOGIC SETTING AND THE RELATION OF EPITHERMAL GOLD-SILVER MINERALIZATION TO WALL ROCK ALTERATION AT THE ROUND MOUNTAIN MINE, NYE COUNTY, NEVADA, IN SCHAFER, R., ET AL, EDS., BULK MINEABLE PRECIOUS METAL DEPOSITS OF THE WESTERN UNITED STATES, THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 375-416.

Reference (Deposit): FERGUSON, H.G., AND CATHCART, S.H., 1954, GEOLOGY OF THE ROUND MOUNTAIN QUAD., NEVADA: U.S. GEOLOGICAL SURVEY GEOLOGICAL QUADRANGLE MAP GQ-40.

Reference (Deposit): KOSCHMANN, A.H., AND BERGENDAHL, M.H., 1968, PRINCIPAL GOLD PRODUCING DISTRICTS OF THE UNITED STATES: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 610, P. 193-194.

Reference (Deposit): ECHO BAY MINES LTD., 1988, ANNUAL REPORT FORM 10-K FOR 1987.

Reference (Deposit): NBMG, 1994, MI-1993

Reference (Deposit): ECHO BAY MINES 1993 ANNUAL REPORT

Reference (Deposit): NEVADA DEPT. OF MINERALS, 1994

Reference (Deposit): 1909 GEOLMAP RANSOME, USGS BULL. 380

Reference (Deposit): 1954 GEOLMAP FERGUSON AND CATHCART, USGS GQ-40

Reference (Deposit): 1921 GEOLMAP FERGUSON, USGS BULL. 725-1

Reference (Deposit): ALBINO, GEORGE, 1993,WRITTEN COMMUNICATIONO S. MARCUS, APRIL 30, 1993

Reference (Deposit): BRUCE VEEK, 1993, WRITTEN COMMUNICATION TO S. MARCUS, REVISING THIS MRDS RECORD. VEEK IS SENIOR GEOLOGIST AT ROUND MOUNTAIN (4/93).

Reference (Deposit): 1923 COMPILE LINCOLN: NEVADA NEWSLETTER PUBLISHING COMPANY

Reference (Deposit): ARGALL, G.O., 1985, HEAP LEACHING SMOKY VALLEY GOLD, ENGINEERING AND MINING JOURNAL, V. 186, NO. 12, P. 18-23.

Reference (Production): 1988-1990 ANNUAL PRODUCTION: MINING JOURNAL/MONTAGU MINING FINANCE, MINING DATABASE, 8/10/91.

Reference (Deposit): KLEINHAMPL, F.J., AND ZIONY, J.I.,19854, MINERAL RESOURCES OF NORTHERN NYE CO.: NEVADA BUREAU OF MINES AND GEOLOGY, BULLETIN 99B.

Reference (Deposit): FERGUSON, H.G., 1921, ROUND MOUNTAIN DISTRICT: U.S. GEOLOGICAL SURVEY BULLETIN 725-I, P. 383-406.

Reference (Production): 1910-1920 CUMULATIVE PRODUCTION: FERGUSON, H.G., 1921, ROUND MOUNTAIN DISTRICT: U.S. GEOLOGICAL SURVEY BULLETIN 725-I, P. 383-406.

Reference (Production): 1906-1969 CUMULATIVE PRODUCTION: TINGLEY, J.V., AND BERGER, B.R., 1985, LODE GOLD DEPOSITS OF ROUND MOUNTAIN, NEVADA: NBMG BULLETIN 100, 62 P.

Reference (Production): 1977-1981 CUMULATIVE PRODUCTION: MILLS, B.A., 1985, GEOLOGY OF THE ROUND MOUNTAIN GOLD DEPOSIT: NYE COUNTY, NEVADA, IN HOLLISTER, V.F., ED., DISCOVERIES OF EPITHERMAL PRECIOUS METAL DEPOSITS, SOCIETY OF MINING ENGINEERS OF AIME, NEW YORK, P. 104-114.

Reference (Production): 1982-1987 CUMULATIVE PRODUCTION: ECHO BAY MINES LTD., 1988, ANNUAL REPORT FORM 10-K FOR 1987.

Reference (Production): 1988-1990 CUMULATIVE PRODUCTION: MINING JOURNAL/MONTAGU MINING FINANCE, MINING DATABASE, 8/10/91. NBMG MI-1993

Reference (Reserve-Resource): NEVADA BUREAU OF MINES AND GEOLOGY MI-1987; SKILLINGS MINING REVIEW, MARCH 3, 1979; WALL STREET JOURNAL, JANUARY 5, 1982. NBMG MI-1993

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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.