1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Portland

Unknown in Teller county in Colorado, United States with commodity Gold
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10264587
MAS/MILS ID 0081190004
Record type Site
Current site name Portland
Alternate or previous names Portland No. 1

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.15197, 38.70111 (WGS84)
Elevation 330
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Teller(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cripple Creek South(quadrangle 1:24,000 scale)

Pikes Peak(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Arkansas(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Geographic areas

Country State County
United States Colorado Teller

Commodities

Commodity Importance
Gold Tertiary

Materials information

Materials Type of material
Calaverite Unknown
Fluorite Unknown
Gold Unknown
Kaolinite Unknown
Pyrite Unknown
Quartz Unknown
Silver Unknown

Economic information

Ore body information

  • Thickness 3M
    Length 30M
    Width 9M
    Area 1HA
    Depth to top 14M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 IRREGULAR
    Type of Orebody #2 SHEAR ZONE
    Primary mode of Origin CONT METASOMATIC
    Secondary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 INTERM ARGILLIC
    Type of Wallrock Alter. #2 CARBONITIZATION
    Avg. Thick. Unconsol. Mat. 2
    Total Surface Area (HA) 1
    Date of Last Modification 780615

Economic information about the deposit and operations

Operation type Underground
Commodity type Metallic
Significant No

Mining district

District name Cripple Creek District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Other

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Underground
    Length 103500M
    Overall depth 1050M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OTHER TIMBERED STOPES
    Swell Factor .33
    Percent Waste Rock 14.5
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    1st Condition of Workings UNKNOWN
    Capacity 0
    Capacity Units MT ORE/DAY
    Unit Production Cost 15640
    Units of Production $/MT ORE
    Year of Information 1948

Reference information

Bibliographic references

  • Deposit

    MINE MAP REPO #400152, 400284, 400345, & OTHERS

  • Deposit

    GEOLOGICAL SURVEY PROF. PAPER 223 PG305VANDERWILT, MINERAL RESOUR

  • Deposit

    COLORADO OWN: PORTLAND GOLD MIN CO

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines

Beyond USGS

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

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.