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Lago Deposit

Prospect in Lyon county in Nevada, United States with commodities Copper, Molybdenum, Silver, Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Reserves and resources
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10310388
MRDS ID N000424
Record type Deposit
Current site name Lago Deposit
Alternate or previous names Bear Copper Deposit, Bear prospect, Lagomarsino Ranch prospect
Related records 10310387

Comments on the site identification

  • All pertinent material from earlier MRDS record N000424 has been incorporated into the current record, as well as additional new information.

Geographic coordinates

Geographic coordinates: -119.18459, 39.01491 (WGS84)
Elevation 1329
Relative position The Bear deposit is located about 54 km southeast of Carson City, just west of Yerington.

Site location context

Political divisions (FIPS codes)

Lyon(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mason Butte(quadrangle 1:24,000 scale)

Carson City(quadrangle 1:100,000 scale)

Reno(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Walker(hydrologic unit)

Walker(hydrologic accounting unit)

Central Lahontan(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management NV)

Bureau of Land Management NV BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Nevada Lyon

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013N 025E 03 04 Nevada

Comments on the location information

  • The Bear deposit is concealed beneath Cenozoic cover just NW of Mcleod Hill.

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Silver Secondary
Gold Secondary

Comments on the commodity information

  • Ore Materials: chalcopyrite, bornite, molybdenite
  • Gangue Materials: pyrite

Materials information

Materials Type of material
Chalcopyrite Ore
Bornite Ore
Molybdenite Ore
Pyrite Gangue

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4
Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock type qualifier porphyry
    Stratigraphic age (youngest) Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Porphyry
    Rock type qualifier quartz monzonite
    Stratigraphic age (youngest) Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Stratigraphic age (youngest) Jurassic
  • Host or associated Associated
    Rock type Plutonic Rock > Porphyry
    Rock type qualifier dikes
    Stratigraphic age (youngest) Tertiary
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -119.18459, 39.01491
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description faults

Controls for ore emplacement

  • Faults and igneous contact

Comments on the geologic information

  • The deposit does not outcrop and is deeply buried.

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Deposit size Small
Significant Yes
Discovery year 1961
Discoverer Anaconda

Mining district

District name Yerington District
District name Mason Valley

Land status

Ownership category Private
Ownership category BLM Administrative Area
Area name Carson City BLM Administrative District

Ownership information

  • Type Owner-Operator
    Owner Anaconda Minerals Company
    Home office Nevada
    Year 1984

Reserves and resources

  • Type In-situ
    Estimate year 1980
    Total resources 454000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.44 wt-pct Copper Primary 1980
  • Type In-situ
    Estimate year 1979
    Total resources 450000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 13.7099 g/mt Copper Primary 1979

Comments on other economic factors

  • The deposit contains an estimated 484,000,000 tons of material grading 0.44% copper and 0.01 % Mo, based on a 1979 resource estimate.

Comments on development

  • In 1965, a Newmont-Utah Construction jpont venture drilled shallow holes in the Lagomarsino Ranch lands area northeast of the main Yerington Deposit on the east side of McLeod Hill, but found insufficient copper mineralization to continue work. Anaconda subsequently acquired the property and drilled 10 deeper holes with similar results. Phelps Dodge drilled 12 holes on the property between 1969 and 1973 and discovered the copper-moly deposit. Development of the deposit would have necessitated relocation of the county airport, which was voted down by the Lyon COunty Board of Commissioners, effectively halting development of this rich orebody.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Replacement and disseminated mineralization is hosted mainly by granodiorite and quartz monzonite deposit but is associated with faulting at an igneous contact zone.
Deposit Associated Minerals: actinolite, biotite, chalcopyrite, magnetite, molybdenite, pyrite
Deposit Associated Rock: quartz monzonite;granite, limestone, rhyolite, sandstone, skarn, volcaniclastic rocks ;andesite, quartz monzodiorite
Deposit Deposit Does Not Outcrop And Is Deeply Buried. General Size Of Ore Body: Large

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-2006 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.
Reporter 18-OCT-1996 Ridenour, James U.S. Bureau of Mines
Reporter 01-SEP-1990 Doebrich, J.L. U.S. Geological Survey
Updater 01-NOV-1991 Moyer, Lorre A. U.S. Geological Survey
Updater 01-AUG-1993 Marcus, S. U.S. Geological Survey
Updater 03-FEB-2010 Anderson, Claire U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Nevada resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.