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  3. Mineral Resource Data System (MRDS)

Lexington Mine

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

Geologic information

Identification information

Deposit ID 10105726
MRDS ID W014737
Record type Site
Current site name Lexington Mine
Related records 10196358

Geographic coordinates

Geographic coordinates: -110.71084, 46.94658 (WGS84)
Elevation 2256
Relative position ABOUT 1 1/2 MILES NE 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 28 Montana

Comments on the location information

  • U.T.M. COORDINATES TAKEN ON MIDDLE ADIT

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Tertiary
Molybdenum Tertiary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore

Host and associated rocks

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

Nearby scientific data

(1) -110.71084, 46.94658
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 Domal Uplift Caused By Intrusion Of Snow Creek Porphyry, Northeast-Trending Fractures & Faults.

Ore body information

  • General form TABULAR
    Strike N 20 E
    Dip 80 NW
    Thickness 1M

Controls for ore emplacement

  • Northeast-Trending Fractures, Snow Creek Porphyry

Comments on the geologic information

  • PRECAMBRIAN CRYSTALLINE ROCKS ARE PRE-BELT. SNOW CREEK PORPHYRY ALSO CALLED NEIHART PORPHYRY.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1891
Discoverer Lexington Consolidated Mining Co.

Mining district

District name Montana (Neihart) District

Ownership information

  • Type Operator
    Owner Lexington Silver-Lead Mines, 2229 Fifth Ave. Sw, Great Falls, Mt 59404
  • Type Owner
    Owner Lexington Silver-Lead Mines, Great Falls, Mt 59404

Comments on the production information

  • ASSUMING THAT 60% OF AREA BETWEEN UPPER AND LOWER ADITS WAS STOPED AND THAT THE ORE WAS 3 FT. WIDE GIVES THE PRODUCTION ESTIMATE. PRODUCTION YEARS 1891 - EARLY 1900'S

Workings at the site

  • Type of workings Underground
    Length 700M

Comments on the workings information

  • MINE PRINCIPALLY DEVELOPED BY 3 ADITS: A LOWER ADIT ABOUT 1000 FT. LONG, A 500 FT MIDDLE ADIT, AND A 350 FT UPPER ADIT. THE UPPER ADIT IS ABOUT 200 FT HIGHER THAN THE LOWER ADIT

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Mlynarczyk, Meg S. 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