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Hartley Mine

Past Producer in Cascade county in Montana, United States with commodities Silver, Lead, Zinc, Gold, 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. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10105721
MRDS ID W014701
Record type Site
Current site name Hartley Mine
Related records 10148956

Geographic coordinates

Geographic coordinates: -110.7289, 46.93797 (WGS84)
Elevation 1890
Relative position ABOUT 1/4 MILE NORTH OF NEIHART, MONTANA

Site location context

Political divisions (FIPS codes)

Cascade(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Neihart(quadrangle 1:24,000 scale)

White Sulphur Springs(quadrangle 1:100,000 scale)

White Sulphur Springs(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Belt(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Helena-Lewis and Clark National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Montana Cascade

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 014N 008E 32 Montana

Comments on the location information

  • PROPERTY IN UNSURVEYED TERRITORY - SECTION ESTIMATED

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Gold Secondary
Copper Secondary

Comments on the commodity information

  • HIGH GRADE ORE GENERALLY COMPRISES ALL OF VEIN FILLING

Materials information

Materials Type of material
Cerargyrite Ore
Proustite Ore
Pyrargyrite Ore
Silver Ore
Sphalerite Ore
Barite Gangue

Alteration

  • (Local) Sericitization, Kaolinization. Considerable Oxidation Of Ore To A Depth Of About 200 Ft.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Snow Creek Porphyry-Pluton And Dikes Of Rhyolite Porphyry;Pinto Diorite-Large Phenocrysts Of Feldspar & Hornblende
    Rock description Snow Creek Porphyry-Pluton And Dikes Of Rhyolite Porphyry;Pinto Diorite-Large Phenocrysts Of Feldspar & Hornblende
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Belt, Neihart Quartzite;Gneiss And Schist
    Rock description Belt, Neihart Quartzite;Gneiss And Schist

Nearby scientific data

(1) -110.7289, 46.93797
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Zone Of Igneous Intrusions Covering Over 800 Square Km.
Type of structure Local
Structure description Moulton Fault, Northeast-Trending Fractures, Domal Uplift Caused By Intrusion Of Snow Creek Porphyry

Ore body information

  • General form SHOOTS
    Strike N 10 E
    Dip 50 NW

Controls for ore emplacement

  • Main Vein Occupies Well-Define Fissure. Moulton Fault To South May Have Been Ore Control.

Comments on the geologic information

  • VEIN MATERIAL COMMONLY BANDED. HIGH GRADE ORE USUALLY COMPRISES ALL OF VEIN FILLING. CRYSTALLINE PRECAMBRIAN ROCKS ARE PRE-BELT

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1883
Discoverer Thomas Angers, Et. Al.
Year of first production 1901

Mining district

District name Neihart District

Ownership information

  • Type Owner
    Owner Neihart Consolidated Silver Mining Co.
    Home office Great Falls, Mt

Comments on the reserve resource information

  • OPENING AND COMPLETION OF COMPROMISE TUNNEL MIGHT GIVE RELATIVELY INEXPENSIVE ACCESS TO MINERALIZED GROUND BETWEEN 500 AND 625 LEVEL. VEIN REPORTED TO HAVE BEEN ABOUT 4 FT. WIDE AT THE 500 LEVEL. EVEN LOW GRADE PRIMARY ORE CARRIED GOOD VALUES IN SILVER AND LEAD. RESOURCES ESTIMATED FOR BLOCK 500 FT LONG BY 200 FT DEEP BY 3 FT WIDE. DRIVING NORTHWARD ON THE NO. 3 VEIN MAY ALSO DISCLOSE ANOTHER ORE SHOOT AND A CROSSCUT TO THE NO. 2 VEIN ON THE ADIT LEVEL OR BELOW MAY OPEN AN ORE SHOOT.

Workings at the site

  • Type of workings Underground
    Length 2000M
    Overall depth 200M

Comments on the workings information

  • DEPOSIT DEVELOPED BY A MAIN HAULAGE ADIT ABOUT 1000 FT. LONG, TWO ADITS ABOVE THE MAIN LEVEL, AND A 500 FT WINZE DRIVEN FROM THE MAIN ADIT WITH SEVERAL LEVELS TURNED FROM THE WINZE. THE COMPROMISE TUNNEL WAS DRIVEN ABOUT 1900 FT. NORTHEAST FROM THE COMPROMISE CLAIM (IN COMPROMISE GULCH) AND LACKED ABOUT 800 FT. OF INTERSECTING THE HARTLEY WORKINGS ABOUT 650 FT BELOW THE MAIN ADIT.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1976 Krohn, Douglas H. U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site