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Mother Lode Mine

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

Geologic information

Identification information

Deposit ID 10055087
MRDS ID RE00027
Record type Site
Current site name Mother Lode Mine
Alternate or previous names Sunday Night Anomaly
Related records 10125036

Geographic coordinates

Geographic coordinates: -116.65006, 36.90636 (WGS84)
Elevation 126
Relative position SIX MILES EAST OF BEATTY, NV.

Site location context

Political divisions (FIPS codes)

Nye(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Beatty Mountain(quadrangle 1:24,000 scale)

Beatty(quadrangle 1:100,000 scale)

Death Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Amargosa(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(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 Nye

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 12S 48E 7 Nevada

Comments on the location information

  • LOCATED AT THE NORTHEAST EXTREMITY OF THE BARE MOUNTAINS.

Commodities

Commodity Importance
Gold Primary
Silver Primary

Comments on the commodity information

  • AU:AG RATIO APPROX. 10:1.

Analytical data

Result BASE METALS, AS, SB, HG ARE ABSENT IN THE ORE ZONE

Mineral occurrence model information

Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite

Nearby scientific data

(1) -116.65006, 36.90636
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Intersection Of Mother Lode Fault And Range Front Faults.

Controls for ore emplacement

  • Fault Zones

Comments on the geologic information

  • SPARSE DATA FOR THE DEPOSIT MAKES SELECTION OF THE MODEL NUMBER DIFFICULT. SELECTION MADE MAINLY ON PROXIMITY AND POSSIBLE GEOLOGICAL SIMILARITY TO THE BOND GOLD BULLFROG DEPOSIT.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1985
Discoverer Gexa Gold Corp.
Year of first production 1989
Production years 1989 - PRESENT (12/91)

Mining district

District name Fluorine

Ownership information

  • Type Joint Venture Owner
    Owner U.S. Nevada Gold Search
  • Type Joint Venture Partner
    Owner Gexa Gold Corp.
  • Type Joint Venture Partner
    Owner U.S. Precious Metals, Inc.
  • Type Joint Venture Partner
    Owner N. A. Degerstrom, Inc.
  • Type Operator
    Owner N. A. Degerstrom, Inc.
    Home office P.O. Box 40, Beatty, Nv 89003

Reserves and resources

  • Type In-situ
    Estimate year 1989
    Total resources 2000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.678 g/mt Gold Major 1989

Comments on the reserve resource information

  • RESERVE FIGURES REPRESENT PRE-MINING ESTIMATES USING A CUTOFF GRADE OF 0.020 OPT GOLD.

Comments on the workings information

  • IN APRIL, 1990, APPROX. 2500 TONS OF OXIDE ORE PER DAY WAS BEING MINED DURING THE INITIAL PHASE OF OPERATION.

Comments on development

  • EXPLORATION FOCUSED ON THE MOTHER LODE FAULT, A N50E-STRIKING FAULT THAT PARALLELS TATES WASH, BASED ON NUMEROUS PROSPECT PITS ALONG ITS STRIKE. 55 HOLES WERE DRILLED ALONG THE MOTHER LODE FAULT, INTERSECTING NARROW ZONES OF GOLD MINERALIZATION. IN 1985, HOLE ML-59 WAS DRILLED TO TEST THE INTERSECTION OF THE MOTHER LODE FAULT WITH NW-STRIKING RANGE FRONT FAULTS. THIS HOLE INTERSECTED 155 FT. GRADING 0.049 OPT GOLD STARTING AT A DEPTH OF 35 FT. 104 REVERSE CIRCULATION AND 3 CORE HOLES WERE THEN DRILLED ON APPROX. 100 FT. CENTERS TO DELINEATE THE MOTHER LODE OREBODY.

Reference information

Bibliographic references

  • Deposit

    MAPA, M.R., 1990, GEOLOGY AND MINERALIZATION OF THE MOTHER LODE MINE, NYE COUNTY, NEVADA, IN SCHAFER, R., ET AL, EDS., THE GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, FIELD TRIP GUIDEBOOK #9, THE GEOLOGICAL SOCIETY OF NEVADA, RENO.

  • Deposit

    NBMG, 1991, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990, P. 24.

  • Deposit

    NBMG, 1994, MI-1993

  • Production

    NBMG, 1991, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990, P. 24. NBMG MI-1993

  • Reserve-Resource

    MAPA, M.R., 1990, GEOLOGY AND MINERALIZATION OF THE MOTHER LODE MINE, NYE COUNTY, NEVADA, IN SCHAFER, R., ET AL, EDS., THE GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, FIELD TRIP GUIDEBOOK #9, THE GEOLOGICAL SOCIETY OF NEVADA, RENO. NBMG MI-1993

General comments

Subject category Comment text
Deposit THIS IS A "BLIND" DISCOVERY. DACITIC INTRUSIVES HOST A MAJORITY OF THE ORE. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1991 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.

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.