Toiyabe-Saddle Deposit

The Toiyabe-Saddle Deposit is a gold mine located in Lander county, Nevada.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Toiyabe-Saddle Deposit
Secondary: 401 Pit
Secondary: Middle Pit
Secondary: South Pit

Commodity

Primary: Gold
Secondary: Silver

Location

State: Nevada
County: Lander
District: Jett District

Land Status

Land ownership: BLM Administrative Area
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.

Holdings

Not available

Workings

Not available

Ownership

Owner Name: Inland Gold And Silver Corp. (Ch To Rec 1 Name,
Company ID: 2602020
Info Year: 1989

Owner Name: Inland Resources Corp.
Info Year: 1996
Years: 1993 -

Owner Name: N. A. Degerstrom, Inc.

Owner Name: Golden Oasis

Owner Name: Cortez Joint Venture
Info Year: 2004

Owner Name: Cortez Joint Venture
Info Year: 2004

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Distal Disseminated
Operation Type: Surface
Years of Production:
Organization:
Significant: Y
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Distal disseminated Ag-Au

Orebody

Form: irregular

Structure

Type: L
Description: northwest-trending thrust faulting

Type: R
Description: Regional structural analysis and project-scale geologic data indicate that a north-northwest trending range-front fault zone passes through the property.

Alterations

Alteration Type: L
Alteration Text: Alteration in the mine area includes; silicification, decalcification, minor oxidization and remobilization of carbon.

Rocks

Name: Latite
Role: Associated
Description: dikes
Age Type: Associated Rock
Age Young: Oligocene

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

Name: Carbonate
Role: Host
Age Type: Host Rock
Age Young: Early Devonian
Age Old: Wenlock

Name: Siltstone
Role: Host
Description: calcareous
Age Type: Host Rock
Age Young: Early Devonian

Analytical Data

Not available

Materials

Ore: Gold

Comments

Comment (Commodity): Ore Materials: gold

Comment (Deposit): The Toiyabe mine was a small gold mining and heap leaching operation from 1987-1991 owned by Inland Gold & Silver Corporation. The Toiyabe mine has been abandoned and reclaimed; it lies on a claim block adjacent to and south of the Toiyabe Property. The mine processed approximately 2,300,000 tons of rock and produced approximately 89,000 oz of gold from three small pits. The Saddle deposit of the Toiyabe mine is a sediment-hosted, structurally controlled gold deposit primarily hosted by the Roberts Mountain formation but with the Roberts Mountain Thrust as the major control on the gold mineralization. Gold mineralization in the Toiyabe mine area occurs in the lower plate carbonates but also occurs in the upper plate siliceous sediments above the Roberts Mountain thrust fault. Little is known about the gold occurrences within the Toiyabe Property and much of the information in this section is derived from the historical gold occurrences at the Toiyabe mine. At the Toiyabe mine, 60% of the gold is derived from the lower plate Roberts Mountain Formation while 40% of the gold comes from the upper plate package. Gold is dominantly associated with silicification, either as quartz veins, quartz veinlets and/or replacement flooding. There is also an association with elevated arsenic, mercury, antimony and silver geochemistry which aids in the search for these deposits. Gold commonly occurs where narrow fracture systems intersect only certain sheared, permeable and reactive carbonates that result in larger, shear-breccia hosted gold systems. Additionally, significant zones of gold mineralization on the subject property are associated with lesser argillic alterations. Gold in the Toiyabe mine is also associated with Oligocene aged rhyolitic-latitic dikes. In several areas of the mine, gold is found in quartz veins or siliceous flooding of igneous dikes,

Comment (Development): Exploration work was completed by Homestake (now Barrick), Getty Oil (now Energold Mining), Freeport Exploration (now Freeport-McMoran Copper & Gold Inc), Degerstrom Inc and Santa Fe Pacific Mining (now Newmont) during the period 1964-1991. Much of the work consisted of drilling. The Toiyabe mine was a small gold mining and heap leaching operation from 1987-1991 owned by Inland Gold & Silver Corporation. The Toiyabe mine has been abandoned and reclaimed; it lies on a claim block adjacent to and south of the Toiyabe Property. The mine processed approximately 2,300,000 tons of rock and produced approximately 89,000 oz of gold from three small pits. In 2004, the property was owned by Cortez Joint Venture: Placer Dome, Inc. (60%) (taken over by Barrick in 2006) and Kennecott Explorations (40%).

Comment (Economic Factors): In 1988 the Toiyabe property was reported to contain 813,400 tons of material grading 0.066 ounces of gold per ton. Production 1988-91 was 52,480 ounces of gold and 25,425 ounces of silver. The open pit mine operation produced a total of about 90,000 ounces of gold from 1987 to 1993.

Comment (Geology): The Toiyabe Range consists of upper-plate metasedimentary and volcanic rocks, exhibiting northwest-trending thrust faulting, interpreted to overlie potentially productive carbonate units such as the Wenban Limestone which hosts the Toiyabe gold deposit.

Comment (Identification): This record contains all material from earlier MRDS record # W700419 and includes all information from that record. MrRDS record # W700419 should be deleted from the database and replaced by this record.

Comment (Location): The Toiyabe Property is situated approximately six miles southwest of Placer Dome's Cortez Gold Mine and consists of 86 unpatented, contiguous and unsurveyed mineral claims, totaling 1,776.76 acres. ALSO LOCATED SEC. 06 T25N, R47E AND SECS. 31, 32 T26N, R47E.

Comment (Workings): 1970s-1980s workings consisted of an open pit multiple bench mine with heap leach and cyanidation plant. That mine has beenreclaimed and the current Saddle deposit is in the same area.

References

Reference (Deposit): NEV. BUREAU OF MINES AND GEOL. SPECIAL PUBLICATION 10, 1990, P. 11.

Reference (Deposit): Golden Oasis website, 2006: http://www.goldenoasis.ca/s/Toiyabe.asp
URL: http://www.goldenoasis.ca/s/Toiyabe.asp

Reference (Ownership): AMERICAN MINES HANDBOOK, 1996, P138.

Reference (Deposit): NEV. DIV. MINE INSPECTION, 1991, DIRECTORY OF NEVADA MINE OPEERATIONS ACTIVE DURING CALENDAR YEAR 1990, P. 54.

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): Staff, 1988, Directory of Nevada Mine Operations Active During Calendar Year 1987: Nevada Division of Mine Inspection, 84 p.

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.