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Swadley Placers

Past Producer in Jefferson county in Colorado, United States with commodity Gold
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10013255
MRDS ID D009450
Record type Site
Current site name Swadley Placers

Geographic coordinates

Geographic coordinates: -105.0653, 39.80082 (WGS84)
Elevation 1609
Location accuracy 500(meters)
Relative position 6 MILES N 45 W FROM DOWNTOWN DENVER, Each Site Within 1000-Ft Radius

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Arvada(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Clear(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Colorado Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 003S 069W 10,12 NW OF SW SE (10); SE OF SW (12) Colorado

Comments on the location information

  • ALONG SOUTH BANKS OF RALSTON CREEK. ELEV AND LAT-LONG GIVEN IS FOR C N2 SE SW SEC. 12. SECTION 10 SITE LIES AT 5360 FT ELEV, 39-48-05N/105-05-55W

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Analytical data

Result PARKER REFERS TO RALPH MINGES' ORIGINAL ESTIMATE OF 25 TO 40 CENTS/YD VALUE OF GRAVEL (AT $35/OZ AU). ONE RICH PAN OF CLAY AND GRAVEL YIELDED 86 FAIR SMALL COLORS AND NUMEROUS COLORS TOO SMALL TO COUNT.

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Sand and Gravel
    Rock unit name Louviers Alluvium;Denver Formation
    Rock description Louviers Alluvium;Denver Formation
    Stratigraphic age (youngest) Pleistocene

Nearby scientific data

(1) -105.0653, 39.80082
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Denver Basin, Front Range Uplift
Type of structure Local
Structure description Denver Basin

Ore body information

  • Thickness 3.05M
    Depth to top 2.44M
    Depth to bottom 5.49M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1858
Year of first production 1858
Year of last production 1859

Mining district

District name Denver Area

Ownership information

  • Type Operator
    Owner Swadley, George
    First year 1859

Comments on the workings information

  • CUT IN SEC. 10 WAS 150 FT LONG, 100 FT WIDE, 18 FT DEEP AT SOUTH END

Reference information

Bibliographic references

  • Deposit

    LINDVALL, R.M., 1979, GEOLOGIC MAP OF THE ARVADA QUADRANGLE, ADAMS, DENVER, AND JEFFERSON COUNTIES, COLORADO: USGS MAP GQ-1453

  • Deposit

    PARKER, B.H., JR., 1974, GOLD PLACERS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 69, NO. 3, P. 63-126

General comments

Subject category Comment text
Deposit 10 FT OF LOUVIERS GRAVEL OVERLIES DENVER FM. CLAYSTONE. GOLD WAS CONCENTRATED IN LOWER 1FT OF GRAVEL AND IN TOP FEW INCHES OF CLAYSTONE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-82 Schwochow, Stephen D. Colorado Geological Survey

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.