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

Porter Mine

Occurrence in Randolph county in North Carolina, United States with commodities Gold, Molybdenum, Tin, Copper
Map
XML
JSON
KML
B
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10026516
MRDS ID K005196
Record type Site
Current site name Porter Mine
Alternate or previous names Pilot Mountain No.1 Mine Carpenter, 1976, Johnson Mine
Related records 10273575

Geographic coordinates

Geographic coordinates: -79.67949, 35.67092 (WGS84)
Elevation 192
Relative position 8.4 MILES SOUTHEAST OF ASHEBORO AND 5 MILES SOUTH OF RAMSEUR.

Site location context

Political divisions (FIPS codes)

Randolph(county)

North Carolina(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ramseur(quadrangle 1:24,000 scale)

Chapel Hill(quadrangle 1:100,000 scale)

Raleigh(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Deep(hydrologic unit)

Cape Fear(hydrologic accounting unit)

Cape Fear(hydrologic subregion)

South Atlantic-Gulf(hydrologic region)

Geographic areas

Country State County
United States North Carolina Randolph

Commodities

Commodity Importance
Gold Primary
Molybdenum Tertiary
Tin Critical Tertiary
Copper Tertiary

Materials information

Materials Type of material
Gold Ore
Hematite Gangue
Kaolin Gangue
Limonite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Silicic, Sericitic

Analytical data

Result GOLD IN SOILS AND BEDROCK IN PROSPECT PITS 0.1 TO 0.5 PPM
Result SEMIQUANTITATIVE E-SPEC ANALYSES MO, 210 PPM
Result SN, 340 PPM
Result CU, 210 PPM
Result ZN, 180 PPM.

Mineral occurrence model information

Model code 154
USGS model code 25e
Deposit model name Epithermal quartz-alunite Au
Mark3 model number 38

Nearby scientific data

(1) -79.67949, 35.67092
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ne-Trending Fold, Probably Overturned To The West
Type of structure Local
Structure description Prominant Foliation N 25 E

Ore body information

  • General form POORLY DEFINED NE-TRENDING ZONE
    Strike N 25 E
    Dip 75 W
    Width 5M

Controls for ore emplacement

  • Advanced Argillic Alteration Probably Controlled By Pre-Metamorphic Faults.

Comments on the geologic information

  • SHEARED FELSIC TUFF STRIKING N 25 E. THE TUFF IS SILICIFIED LITHIC TUFF WHICH CONTAINS DISSEMINATED HEMATITE AFTER PYRITE. THE ROCK HAS BEEN BLEACHED AND BRECCIATED IN THE VICINITY OF THE WORKINGS. SOME SACCHAROIDAL AND MILKY QUARTZ IS ALSO PRESENT.uNORTHERN PART OF THE PILOT MOUNTAIN METEORIC-WATER HYDROTHERMAL SYSTEM, THATuHAS PRODUCED ANDALUSITE-PYROPHYLLITE ALTERATION AND CU, MO, SN, AUuENRICHMENTS IN THE AREA SURROUNDING PILOT MOUNTAIN (RANDOLPH COUNTY).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1886

Mining district

District name Carolina Slate Belt

Workings at the site

  • Type of workings Surface
    Length 15M
    Overall length 13.72M
    Overall width 5M

Comments on the workings information

  • THE WORKINGS CONSIST OF TRENCHES TRENDING N 25 E AND N 35 E AND A FEW PITS, ONE SHAFT OF UNKNOWN DEPTH.

Reference information

Bibliographic references

  • Analytical Data

    KLEIN, T.L. AND SCHMIDT, R.G., 1985.

  • Deposit

    CARPENTER, P. A., III, 1976, METALLIC MINERAL DEPOSITS OF THE CAROLINA SLATE BELT, NORTH CAROLINA: NORTH CAROLINA MINERAL RESOURCES SEC. BULL. 84, 166 P. KLEIN, T.L. AND SCHMIDT, R.G., 1985, GEOLOGY OF THE PILOT MOUNTAIN-FOX MOUNTAIN ALTERATION SYSTEM: IN P.G. FEISS, ED, VOLCANIC-HOSTER GOLD AND HIGH ALUMINA DEPOSITS OF THE CAROLINA SLATE BELT, SEG FIELD TRIP GUIDEBOOK, FALL MEETING 1985

General comments

Subject category Comment text
Deposit THIN SEAMS AND STRINGERS OF HEMATITE AFTER PYRITE ARE ASSOCIATED WITH THIN QUARTZ VEINLETS THAT ARE CONCORDANT ANDuSOMEWHAT DISCORDANT TO FOLIATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1976 Mcdaniel, Ronald D. North Carolina Division of Land Resources
Updater 01-JUN-1992 Klein, T.L. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site