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Express Mine

Occurrence in Saguache county in Colorado, United States with commodities Silver, Gold, Lead, Zinc, Copper, Manganese
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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. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10012421
MRDS ID D008036
Record type Site
Current site name Express Mine
Alternate or previous names Express-Headlight Mine
Related records 10191252

Geographic coordinates

Geographic coordinates: -106.11032, 38.2514 (WGS84)
Elevation 2825
Relative position 11.1 MILES N08E FROM SAGUACHE

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Whale Hill(quadrangle 1:24,000 scale)

Saguache(quadrangle 1:100,000 scale)

Montrose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Luis(hydrologic unit)

Rio Grande Headwaters(hydrologic accounting unit)

Rio Grande Headwaters(hydrologic subregion)

Rio Grande(hydrologic region)

Geographic areas

Country State County
United States Colorado Saguache

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 046N 008E 08 SW OF NW OF SE Colorado

Comments on the location information

  • S-T-R, LAT-LONG, AND ELEV. TAKEN FROM BURBANK'S (1932) PLATE 1 (SCALE 1:12000). MINE OR CLAIM LIES ALONG EXPRESS GULCH 3.4 MILES SE OF BONANZA ; INFO FROM LAND.ST :(1976)

Commodities

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

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Covellite Ore
Enargite Ore
Galena Ore
Pyrargyrite Ore
Pyrite Ore
Sphalerite Ore
Stromeyerite Ore
Tennantite Ore
Fluorite Gangue
Quartz Gangue
Rhodochrosite Gangue

Alteration

  • (Local) Early Barren Stage Of Alteration By Fumarolic Or Acid-Hot Spring Activity Resulted In Intense Silicification, Wallrock Replacement By Jasper And Alteration Products Hematite, Diaspore, Alunite, Barite, Zunyite, Rutile, And Kaolin Minerals. Later Mineralizing Stage By Alkaline Or Neutral Solutions Deposited Ore And Gangue And Caused Micaceous Alteration (Sericite And Chlorite) And Calcite, Quartz, And Pyrite.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Rawley Andesite;Intrusive Quartz Latite And Rhyolite
    Rock description Rawley Andesite;Intrusive Quartz Latite And Rhyolite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Rawley Andesite;Intrusive Quartz Latite And Rhyolite
    Rock description Rawley Andesite;Intrusive Quartz Latite And Rhyolite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -106.11032, 38.2514
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Bonanza Caldera
Type of structure Regional
Structure description Sawatch Range, San Juan Volcanic Field, Rio Grande Rift

Ore body information

  • Strike N 50 TO 80 W
    Dip 75SW TO 75NE
    Thickness 1.22M

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Year of last production 1928

Mining district

District name Bonanza (Kerber Creek) District

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Express-Headlight Mining And Development Co.
    First year 1928

Workings at the site

  • Type of workings Underground
    Overall depth 73.15M

Comments on the workings information

  • 240-FT-DEEP SHAFT WITH LEVELS DRIVEN AT DEPTHS OF 96, 150, AND 224 FT. APPROX. 150 FT OF DRIFTS ON 96 LEVEL AND 300 FT ON 224 LEVEL

Comments on development

  • MOSTLY EXPL. AND DEVEL. NO PRODUCTION. LAST RECORD OF ACTIVITY WAS SOME RETIMBERING AND DRIFTING IN 1933.

Reference information

Bibliographic references

  • Deposit

    PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.

  • Deposit

    BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.

General comments

Subject category Comment text
Deposit EXPRESS VEIN (ATTITUDE GIVEN ABOVE) IS 1- TO 4-FT-WIDE EPITHERMAL VEIN WHOSE PARAGENESIS WAS QUARTZ AND FLUORITE, BASE METAL SULFIDES WITH SMALL AMT. AG, QUARTZ-FLUORITE WITH SMALL AMT. SULFIDES, RHODOCHROSITE, BARREN CALCITE. VEIN IS PARTLY OXIDIZED ON 96 LEVEL BUT LITTLE OR NO OXIDATION ON 224 LEVEL.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1981 Schwochow, Stephen D. Colorado 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

Authoritative Colorado resources

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