Post Boy

Occurrence in Marion county in Arkansas, United States with commodity Zinc

Geologic information

Identification information

Deposit ID 10096598
MRDS ID W032574
Record type Site
Current site name Post Boy

Geographic coordinates

Geographic coordinates: -92.89185, 36.29591 (WGS84)
Elevation 305
Relative position ABOUT 1.4 MILES NE OF ZINC
(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 19N 18W 15 NW4 OF SW4 Arkansas

Comments on the location information

  • IN COKER HOLLOW, IN UPPER PART OF THE ST. JOE BEDS, NEXT TO THE BOONE COUNTY LINE, ON A TRIBUTARY TO THE WESTERLY UPPER BRANCH OF TAR KILN CREEK ; INFO FROM LAND.ST :1969

Commodities

Commodity Importance
Zinc Primary

Materials information

Materials Type of material
Hemimorphite Ore
Sphalerite Ore

Alteration

  • (Local) Solution Cavities Made By Weathering Of Sphalerite Crystals

Analytical data

Result DARK RED TALLOW CLAY: SIO2, 40.91
Result AL2O3, 9.33
Result ZNO, 34.79 (EQUIV TO 27.91 METAL. ZINC)
Result FE2O3, 2.25
Result FEO, 0.52, CAO, 3.42
Result MGO
Result 0.48
Result NA2O, .42
Result H2O, 9.02% TOTAL, 101.14.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name St. Joe Marble
    Rock description St. Joe Marble
    Stratigraphic age (youngest) Mississippian

Nearby scientific data

(1) -92.89185, 36.29591

Ore body information

  • General form IRREGULAR WITHIN HORIZON OF BRECCIATION

Comments on the geologic information

  • HEMIMORPHITE LINES MOST OF THE SMALL CAVITIES WITHIN THE ROCK CONTAINING SPHALERITE AND IS GENERALLY DISSEMINATED THROUGH THE SPONGY, SILICEOUS CREAM-COLORED ROCK.

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

Comments on the workings information

  • OPENING 50 FEET BY 15 FEET BY 4 TO 8 FEET IN DEPTH

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W032574

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. 120 USGS RESTON (241) AR5 (& YELLVILLE SHEET IN THAT BOOK)

General comments

Subject category Comment text
Deposit THE UPPER SURFACE OF THESE DEPOSITS MAY REPRESENT THE LOWER GROUND WATER LEVEL AT THE TIME OF DEPOSITION, IF THEY ARE CLASSIC MISSISSIPPI VALLEY-TYPE DEPOSITS
Deposit CAVITIES ARE UP TO AN INCH OR MORE IN DIAMETER & HAVE SPHALERITE CRYSTAL-FACE IMPRESSIONS THE ST. JOE BEDS CROP OUT BELOW THE CUT, SHOWING THAT THE MINERALIZATION IS NOT CONFINED TO THE BEDS AS MUCH AS 100 FEET LOWER, BUT INSTEAD THAT IT MUST HAVE TAKEN PLACE AT A RELATIVELY HORIZONTAL HORIZON WITHOUT RESPECT TO THE FORMATIONS PRESENT. ; 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