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Hortense Mine

Past Producer in Saguache county in Colorado, United States with commodities Lead, Silver, Zinc, Copper, Gold, Tellurium, Arsenic
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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. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10012537
MRDS ID D008205
Record type Site
Current site name Hortense Mine
Related records 10143065

Geographic coordinates

Geographic coordinates: -106.13366, 38.29973 (WGS84)
Elevation 2990
Relative position 14.2 MILES N02E FROM SAGUACHE

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bonanza(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)

Federal lands

Rio Grande 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 Colorado Saguache

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 047N 008E 30 SW OF SE OF NW 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 ON SE SIDE OF COPPER GULCH BETWEEN LIBERTY AND ST LOUIS MINES ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Lead Primary
Silver Primary
Zinc Critical Primary
Copper Primary
Gold Primary
Tellurium Critical Tertiary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Galena Ore
Hessite Ore
Petzite Ore
Pyrite Ore
Sphalerite Ore
Sylvanite Ore
Tennantite Ore
Barite Gangue
Calcite Gangue
Jasper Gangue
Quartz 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.

Analytical data

Result ORE SHIPMENT CONTAINED 21% PB, 1% CU, 36.6 OZ/TON AG, 0.6 OZ/TON AU

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Rawley Andesite
    Rock description Rawley Andesite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Rawley Andesite
    Rock description Rawley Andesite

Nearby scientific data

(1) -106.13366, 38.29973
ListMap

Economic information

Geologic structures

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

Ore body information

  • Strike N 70 TO 85 E
    Dip 60 TO 90 NW
    Width 0.61M

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Bonanza (Kerber Creek)

Land status

Ownership category Private

Comments on the production information

  • COLO. DIV. MINES REPORTED 1925 PRODUCTION OF 3 ST CONCENTRATES. ORE GRADE WAS 6.64 OZ/TON AU, 351.42 OZ/TON AG, 25% PB, 1% CU, 3% ZN, 13% FE.

Workings at the site

  • Type of workings Underground
    Area 1.093HA
    Length 310.9M
    Overall length 161.54M
    Overall width 67.06M

Comments on the workings information

  • TUNNEL INITIALLY DRIVEN S24E BUT IN 70 FT CURVES EASTWARD TO INTERSECT VEIN, THENCE GENERALLY N73E FOR 480 FT ALONG VEIN AND NORTH SPLIT. 100-FT SHAFT FROM SURFACE PROBABLY INTERSECTS TUNNEL AT 360 FT FROM PORTAL. RAISES DRIVEN AT 140, 310 (ON BRANCH TUNNEL), AND 340 FT (ON MAIN DRIFT) FROM PORTAL. AT 380 FT FROM PORTAL, DRIFT DRIVEN SSW AND SE FOR 230 FT TO CACED AREA. WORKINGS LIE APPROX. 90 FT ABOVE FIRST LEVEL OF EMPRESS JOSEPHINE MINE.

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 VEIN IS NARROW BUT PROBABLY LIES IN FAULTED PORTION OF SAME FISSURE CONTAINING EMPRESS JOSEPHINE VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-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.