Unnamed Pge Occurrence

Occurrence in Loudoun county in Virginia, United States with commodities Platinum, Palladium, Copper, Nickel, Cobalt, Gold, Lead, Zinc
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10048644
MRDS ID MP00248
Record type Site
Current site name Unnamed Pge Occurrence

Geographic coordinates

Geographic coordinates: -77.60302, 39.02142 (WGS84)
Elevation 91
Location accuracy 1000(meters)
Relative position ABOUT 4 MI SOUTH OF LEESBURG, Estimated Within Area Where Samples Were Collected

Site location context

Political divisions (FIPS codes)

Loudoun(county)

Virginia(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Leesburg(quadrangle 1:24,000 scale)

Frederick(quadrangle 1:100,000 scale)

Baltimore(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Potomac-Catoctin(hydrologic unit)

Potomac(hydrologic accounting unit)

Potomac(hydrologic subregion)

Mid Atlantic(hydrologic region)

Geographic areas

Country State County
United States Virginia Loudoun

Comments on the location information

  • UNSURVEYED INFO FROM LAND.ST :01?

Commodities

Commodity Importance
Platinum Critical Primary
Palladium Critical Primary
Copper Primary
Nickel Critical Primary
Cobalt Critical Primary
Gold Primary
Lead Primary
Zinc Critical Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Apatite Gangue
Ilmenite Gangue
Quartz Gangue

Analytical data

Result SEVERAL SAMPLES, AVERAGES FOR EACH ZONE: CU=120-650 PPM, PT=1-12 PPB, PD=1.6-100 PPB, NI=8-65 PPM, CO=38-50 PPM. MAX. PD=500 PPB, PT=41 PPB. PD/PT=1-8

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -77.60302, 39.02142

Economic information

Ore body information

  • General form UNKNOWN BUT PROBABLY DISSEMINATED
    Thickness 150M

Controls for ore emplacement

  • Magmatic Segregation

Comments on the geologic information

  • DIABASE IS COMPOSED OF FERROGABBRO, FERRODIORITE, AND GRANOPHYRE. GREATEST PGE CONCENTRATION IS IN LATE-STAGE DIFFERENTIATES. DURING DIFFERENTIATION, PT IS ENRICHED RELATIVE TO PD IN CUMULATE LAYERS. PD IS ENRICHED RELATIVE TO PT IN LATER DIFFERENTIATES

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Comments on the workings information

  • GEOCHEMICAL SAMPLING ONLY

Comments on development

  • DISCOVERED DURING SCIENTIFIC RESEARCH AND NO ECONOMIC CONCENTRATIONS HAVE YET BEEN FOUND IN MESOZOIC BASINS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit 5 SUBHORIZONTAL GEOCHEMICALLY ANOMALOUS ZONES; UNPUBLISHED MODEL NAME: MAGMATIC SEGREGATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-92 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

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