Pilot Rock Mine

Occurrence in Marion county in Arkansas, United States with commodities Zinc, Lead

Geologic information

Identification information

Deposit ID 10096589
MRDS ID W032543
Record type Site
Current site name Pilot Rock Mine
Related records 10135189

Geographic coordinates

Geographic coordinates: -92.80296, 36.33619 (WGS84)
Elevation 305
Relative position 3.0 MILES SE OF MONARCH
(click for info)

Geographic areas

Country State County
United States Arkansas Marion

Public Land Survey System information

Meridian Township Range Section Fraction State
5th Principal 20N 17W 32 S2 OF NE4 Arkansas

Comments on the location information

  • UPPER PART OF EAST SUGAR LOAF CREEK ; INFO FROM LAND.ST :1969

Commodities

Commodity Importance
Zinc Primary
Lead Tertiary

Comments on the commodity information

  • TALLOW CLAY CONSPICOUS IN TUNNEL; EVIDENTLY A DECOMPOSITION PRODUCT OF DOLOMITE, FOLLOWS BEDDING.

Materials information

Materials Type of material
Smithsonite Ore
Sphalerite Ore

Alteration

  • (Local) Heavily Decayed Limestone And Chert. "Chert Is Fractured In The Usual Way."

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Stratigraphic age (youngest) Late Ordovician

Nearby scientific data

(1) -92.80296, 36.33619

Ore body information

  • General form TEN FOOT THICK BED

Comments on the geologic information

  • BRECCIATION SUGGESTED BY REMARK ABOUT TYPICALLY FRACTURED CHERT OCCASIONAL SMALL SOLUTION CAVERNS

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name North Arkansas Zinc Region

Land status

Ownership category Private

Workings at the site

  • Type of workings Underground
    Length 41.15M
    Overall depth 22.86M

Comments on the workings information

  • TUNNEL IS 6X8 FEET IN SECTION, INTERSECTS SHAFT HALFWAY DOWN TUNNEL AT MIDPOINT OF SHAFT. TUNNEL ENTRY IS 50' LOWER THAN BOTTOM OF THE (RED, COLORED) ST. JOE MARBLE; AND IS CLOSE TO THE BOTTOM OF THE GULCH.

Comments on development

  • THIS INFORMATION FROM FIELD NOTES BY A.H. PURDUE, 1900.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W032543

Bibliographic references

  • Deposit

    ANNUAL REPORT OF THE GEOLOGICAL SURVEY OF ARKANSAS FOR 1892 (PUB. DEC, 1900), VOL V: THE ZN AND PB REGION OF NORTH ARK., BY STATE GEOLOGIST JOHN C. BRANNER, P. 91 USGS RESTON (241) AR5 (AND YELLVILLE SHEET MAP THAT ACCOMPANIES BOOK)

General comments

Subject category Comment text
Deposit NO ORE FOUND IN SHAFT ABOVE TUNNEL. AT LEVEL OF TUNNEL, IN THE SHAFT, TEN FEET OF ORE ENCOUNTERED NO ORE IN SHAFTS LOWER 40' SAVE SOME ORS. SP VOL, IN BOTTOM
Deposit ORE FOLLOWS BEDDING PLANES IN INNER 1/2 OF THE TUNNEL; AND IS MOSTLY FREE ORE; SOME ORE IS DISSEMINATED IN THE CHERT ORE IS FREQUENTLY FOUND IMBEDDED IN THE "TALLOW CLAY". ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1982 Wright, Noel J. (Calkins, James A.) U.S. Geological Survey