Lone Tree Mine

The Lone Tree Mine is a gold mine located in Humboldt county, Nevada at an elevation of 4,551 feet.

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

Name: Lone Tree Mine  

State:  Nevada

County:  Humboldt

Elevation: 4,551 Feet (1,387 Meters)

Commodity: Gold

Lat, Long: 40.83361, -117.20972

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Lone Tree Mine

Lone Tree Mine MRDS details

Site Name

Primary: Lone Tree Mine
Secondary: Wayne Zone


Commodity

Primary: Gold
Secondary: Silver
Tertiary: Arsenic
Tertiary: Mercury
Tertiary: Copper
Tertiary: Antimony


Location

State: Nevada
County: Humboldt
District: Battle Mountain


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Owner Name: Santa Fe Pacific Mining

Owner Name: Lone Tree Mining, Inc.


Production

Not available


Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1991
Discovery Year: 1989
Years of Production:
Organization:
Significant: N
Deposit Size: M


Physiography

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


Mineral Deposit Model

Model Name: Carbonate-hosted Au-Ag


Orebody

Not available


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Silicification, Argillization, Pyritization.


Rocks

Name: Mafic Intrusive Rock
Role: Associated
Age Type: Associated Rock
Age Young: Eocene

Name: Mafic Intrusive Rock
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene


Analytical Data

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


Materials

Ore: Pyrite
Gangue: Marcasite
Gangue: Chalcopyrite


Comments

Comment (Development): 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

Comment (Reserve-Resource): 1992 FIGURES ARE EXCLUSIVE OF STONEHOUSE RESERVES AND WERE CALCULATED USING A STRIP RATIO OF 8.82:1.

Comment (Commodity): IN SULFIDE ORE, AU IS ASSOCIATED MAINLY WITH ARSENOPYRITE AND TO A LESSER EXTENT WITH ONE OR TWO GENERATIONS OF PYRITE.

Comment (Production): PRODUCTION FORECAST FOR 1992 IS 103,000 OZ. AU.

Comment (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.

Comment (Deposit): OVERBURDEN RANGES 1 FT. TO 200 FT.

Comment (Workings): 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.


References

Reference (Deposit): THE MINING RECORD, AUG 4,1993

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

Reference (Reserve-Resource): NBMG MI-1993

Reference (Deposit): BRAGINTON, B., 1992, LONE TREE MINE, ABSTRACT IN APRIL, 1992 GEOLOGICAL SOCIETY OF NEVADA NEWSLETTER.

Reference (Deposit): BRAGINTON, B., 1992, LONE TREE MINE, ORAL PRESENTATION AT APRIL 17, 1992 MEETING OF THE GEOLOGICAL SOCIETY OF NEVADA.

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

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

Reference (Deposit): NEVADA DIVISION OF MINERALS, 1994


Nevada Gold

Gold Districts of Nevada

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.