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Lone Tree Mine

Producer in Humboldt county in Nevada, United States with commodities Gold, Silver, Arsenic, Antimony, Mercury, Copper
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10055099
MRDS ID RE00041
Record type Site
Current site name Lone Tree Mine
Alternate or previous names Wayne Zone
Related records 10125353, 10310324

Geographic coordinates

Geographic coordinates: -117.21067, 40.83351 (WGS84)
Elevation 1387

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Valmy(quadrangle 1:24,000 scale)

Winnemucca(quadrangle 1:100,000 scale)

Winnemucca(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 34N 42E 11 Nevada

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Arsenic Critical Tertiary
Antimony Critical Tertiary
Mercury Tertiary
Copper Tertiary

Comments on the commodity information

  • IN SULFIDE ORE, AU IS ASSOCIATED MAINLY WITH ARSENOPYRITE AND TO A LESSER EXTENT WITH ONE OR TWO GENERATIONS OF PYRITE.

Materials information

Materials Type of material
Pyrite Ore
Chalcopyrite Gangue
Marcasite Gangue

Alteration

  • (Local) Silicification, Argillization, Pyritization.

Analytical data

Result TRACE ELEMENTS LINKED TO AU INCLUDE AS, SB, AND HG. MINOR AG HAS BEEN NOTED LOCALLY IN THE DEPOSIT.

Mineral occurrence model information

Model code 172
USGS model code 26a
Deposit model name Carbonate-hosted Au-Ag
Mark3 model number 15

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Rock unit name Altered Quartz Porphyry Dikes
    Rock description Altered Quartz Porphyry Dikes
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Valmy Formation;Antler Sequence;Havallah Sequence
    Rock description Valmy Formation;Antler Sequence;Havallah Sequence
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Meta-Basalt
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert

Nearby scientific data

(1) -117.21067, 40.83351
ListMap

Economic information

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1989
Discoverer Santa Fe Pacific Mining
Year of first production 1991
Production years 1991 - PRESENT (4/92)

Mining district

District name Battle Mountain

Ownership information

  • Type Operator
    Owner Lone Tree Mining, Inc.
  • Type Owner
    Owner Santa Fe Pacific Mining

Comments on the production information

  • PRODUCTION FORECAST FOR 1992 IS 103,000 OZ. AU.

Reserves and resources

  • Type In-situ
    Estimate year 1990
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.541 g/mt Gold Major 1990
  • Type In-situ
    Estimate year 1992
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.597 g/mt Gold Major 1992

Comments on the reserve resource information

  • 1992 FIGURES ARE EXCLUSIVE OF STONEHOUSE RESERVES AND WERE CALCULATED USING A STRIP RATIO OF 8.82:1.

Comments on the workings information

  • THE PROJECT AREA INCORPORATES ALL OR PART OF FOUR SECTIONS WHICH ARE 100% OWNED BY LONE TREE MINING, INC., A SUBSIDIARY OF SANTA FE PACIFIC MINERALS. ORE IS SEGREGATED INTO OXIDE HEAP LEACH, SULFIDE MILL, AND RUN-OF-MINE HEAP LEACH. CONVENTIONAL HEAP LEACHING METHODS ARE UTILIZED TO RECOVER UP TO 90% OF THE GOLD IN THE OXIDE HEAP LEACH ORE. RUN-OF-MINE HEAP LEACH RECOVERY IS ONLY EXPECTED TO BE 40%, BUT THE LOW COST OF THIS PROCESS ALLOWS TREATMENT OF THE LOWER GRADE ORE AT A PROFIT. SULFIDE ORE IS BEING STOCKPILED. EXPECTED MINE LIFE IN 1992 WAS 12 YEARS.

Comments on development

  • HINDRANCE TO THE SITING OF THE DRILL HOLES. PRIOR TO MINE DEVELOPMENT, THESE POWER LINES WERE MOVED AT A COST OF $4 MILLION. THE PRODUCTION DECISION WAS MADE MAY, 1990, CONSTRUCTION BEGAN IN DECEMBER, 1990, FULL SCALE MINING BEGAN APRIL, 1991, AND THE FIRST DORE WAS POURED AUGUST, 1991. OVER 400 DRILL HOLES HAD BEEN COMPLETED AT LONE TREE AS OF APRIL, 1992. ; ECON.COM: PROJECT CAPITAL COST WAS $52.9 MILLION, EXCLUDING INITIAL EXPLORATION. CASH COSTS IN 1991 WERE $103.45/OZ. AU. A MILL EQUIPPED WITH A LOW TEMPERATURE, LOW PRESSURE AUTOCLAVE TO TREAT SULFIDE ORE IS SCHEDULED TO BE BUILT IN 1994 AT AN ESTIMATED COST OF $67 MILLION.
  • DRILLING AT LONE TREE WAS CONDUCTED NEAR THE COMPLETION OF A MUCH LARGER DRILLING PROGRAM IN THE SOUTH VALMY AREA. HOLES AT LONE TREE WERE SITED IN PART ON DRILLING RESULTS AT THE STONEHOUSE DEPOSIT IMMEDIATELY TO THE SOUTH AND IN PART ON GEOLOGIC FACTORS CONSIDERED SINCE 1987. THE DISCOVERY HOLE, TH-79, WAS DRILLED IN JULY, 1989. IT INTERSECTED 35 FT. GRADING 0.12 OPT AU STARTING AT A DEPTH OF 140 FT. A FOLLOW-UP REVERSE CIRCULATION DRILLING PROGRAM OF 10 HOLES WAS BEGUN IN AUGUST, 1989. THESE WERE ANGLE HOLES DRILLED MAINLY AS EAST-WEST FENCES IN THE VICINITY OF TH-79. OF THESE 10 HOLES, ONLY 1 FAILED TO INTERSECT SIGNIFICANT AU MINERALIZATION. BY DECEMBER, 1989, THE KNOWN STRIKE LENGTH OF THE AU-BEARING STRUCTURE EXTENDED NEARLY 0.5 MILE ON SANTA FE PACIFIC PROPERTY. AN ACCELERATED DRILLING PROGRAM BEGINNING IN JANUARY, 1990, USED AS MANY AS 17 DRILL RIGS SIMULTANEOUSLY. THE GOAL WAS TO DELINEATE AN OXIDE RESOURCE BY JUNE, 1990. THE PRESENCE OF POWER LINES ON THE PROPERTY WAS A

Reference information

Bibliographic references

  • Deposit

    BRAGINTON, B., 1992, LONE TREE MINE, ABSTRACT IN APRIL, 1992 GEOLOGICAL SOCIETY OF NEVADA NEWSLETTER.

  • Deposit

    BRAGINTON, B., 1992, LONE TREE MINE, ORAL PRESENTATION AT APRIL 17, 1992 MEETING OF THE GEOLOGICAL SOCIETY OF NEVADA.

  • Deposit

    MINING JOURNAL/MONTAGU MINING FINANCE, MINING DATABASE, 8/10/91.

  • Deposit

    NBMG, 1994, MI-1993

  • Deposit

    NEVADA DIVISION OF MINERALS, 1994

  • Deposit

    THE MINING RECORD, AUG 4,1993

  • Production

    BRAGINTON, B., 1992, LONE TREE MINE, ORAL PRESENTATION AT APRIL 17, 1992 MEETING OF THE GEOLOGICAL SOCIETY OF NEVADA. NBMG MI-1993

  • Reserve-Resource

    NBMG MI-1993

General comments

Subject category Comment text
Deposit OVERBURDEN RANGES 1 FT. TO 200 FT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1992 Phinisey, J. D. (Marcus, S.) U.S. Geological Survey
Updater 01-SEP-1994 Li, Zhiping (Moyer, Lorre A.) U.S. Geological Survey

Beyond USGS

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

Current status (per MSHA)

StatusActive since 12/07/2011
MSHA mine ID2602159
Mine name (MSHA)Lone Tree Mine
Current operatorGoldcorp DEE LLC
Current controller (parent)i-80 Gold Corp
Mine typeSurface (Metal / non-metal)

Inferred by coordinate + name similarity (1649 m, 1.00 match). Confirm against MSHA if precision matters — non-USGS-curated cross-references may occasionally point at a neighbouring mine.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

External references

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.