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Cross Mine

Past Producer in Boulder county in Colorado, United States with commodities Gold, Silver, Zinc, Lead, 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. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10017342
MRDS ID DC03307
Record type Site
Current site name Cross Mine
Alternate or previous names Potosi & Cross Mines

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
-105.57615, 39.97943 (WGS84) SE 1/4 NE 1/4
(click for info)
-105.57253, 39.97805 (WGS84) 10 SE 1/4 NE 1/4

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nederland(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Vrain(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Arapaho and Roosevelt National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Boulder

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 01S 73W 08 Colorado

Comments on the location information

  • Location of Cross adit, about 2000 feet SE of Caribou, NW/4 sec. 9, T1S, R73 W.

Commodities

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

Materials information

Materials Type of material
Silver Ore

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -105.57615, 39.97943
ListMap
(2) -105.57253, 39.97805
ListMap

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1877

Mining district

District name Grand Island-Caribou District

Comments on the production information

  • POTOSI-1877-$18,000
  • Exploration and development work at the Cross Mine, from 1977 to 1982, resulted in production valued at $2.1 million, including about 3440 oz Au, 83,000 oz Ag, 200,000 lb Zn, 166,000 lb Pb, and 20,000 lb Cu, from 22,500 tons of crude ore.

Comments on the reserve resource information

  • Calais Resources has continued exploration in the Caribou and Cross mines area and reports (2005) a total resource (measured, indicated, and inferred) of: 437,240 oz Au and 12,575,240 oz Ag, contained in 1,058,000 tons of mineralized material for the Caribou/Cross project. The company continued exploration in the district in 2004 and 2005.

Reference information

Bibliographic references

  • Deposit

    MOORE AND OTHERS, 1957, USGS BULL. 1030-N, P. 547 AND PL. 35.

  • Deposit

    CONSV. DIV. COMP. DATE, 10,62

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

  • Reserve-Resource

    Calais Resources corporate info., accessed from internet on 12/20/2005.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-73 Conservation Division Files U.S. Geological Survey
Updater 22-DEC-05 Beach, Richard A. Colorado Geological Survey
Updater 29-MAY-07 Melton, Greg U.S. Geological Survey

Beyond USGS

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

Current status (per MSHA)

StatusNonProducing since 12/12/2022
MSHA mine ID0502430
Mine name (MSHA)Cross Mine
Current operatorGrand Island Resources, LLC
Current controller (parent)Calais Resources Inc
Mine typeUnderground (Metal / non-metal)

Inferred by coordinate + name similarity (418 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.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.