Rock Fence Prospect

Past Producer in Howard county in Arkansas, United States with commodity Mercury

Geologic information

Identification information

Deposit ID 10040367
MRDS ID M055093
MAS/MILS ID 50610004
Record type Site
Current site name Rock Fence Prospect
Alternate or previous names Rock Fence Mine
Related records 10138406

Geographic coordinates

Point of reference Pit
Geographic coordinates: -93.83278, 34.14912 (WGS84)
Elevation 171
Location accuracy 50(meters)
Relative position 7 MI NW OF MURFREESBORO. "Mine" symbol on topo.
(click for info)

Geographic areas

Country State County
United States Arkansas Howard

Public Land Survey System information

Meridian Township Range Section Fraction State
5th Principal 007S 027W 13 SW NE NW Arkansas

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Dickite Gangue
Quartz Gangue

Alteration

  • (Local) Sandstone Is Locally Silicified.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Gap Ridge Sandstone Member, Sandstone
    Rock description Gap Ridge Sandstone Member, Sandstone
    Stratigraphic age (youngest) Pennsylvanian
    Stratigraphic age (youngest) Pennsylvanian

Nearby scientific data

Pit (1) -93.83278, 34.14912

Geologic structures

Type of structure Regional
Structure description Thrust Faults, N-S Tear Faults, And Two Fold Systems ; Reg.Trends: Thrust Faults From S In Late Paleozoic

Controls for ore emplacement

  • Faults In Sandstone And Sharp Folds

Comments on the geologic information

  • GEOL.DESC: SANDSTONE BEDS RANGE FROM 6 IN TO 24 IN THICKNESS. THIN SHALE INTERBEDS. STRIKE N 70 E, DIP 90. WALLS OF STOPE ARE SLICKENSIDED. SANDSTONE IS LOCALLY BRECCIATED.

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery method Ore-Mineral In Place

Mining district

District name Arkansas Quicksilver District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Z.A. Copeland
    Year 1965
  • Type Operator
    Owner C. Q. Schow, C. E. Holmes
  • Type Owner
    Owner J. B. Floyd, Z.A. Copeland

Workings at the site

  • Type of workings Unknown
    Overall length 15.24M
    Overall width 0.76M
  • Type of workings Surface

Comments on the workings information

  • TRENCH 85 FT LONG, 4 FT DEEP (25 FT DEEP NEAR CENTER), 2.5 FT. WIDE. OPEN STOPE 50 FT LONG, 2.5 FT. WIDE, 75 FT. DEEP.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M055093
U.S. Bureau of Mines Minerals Availability System MAS 50610004 = newMRDS 10138406, merged and deleted.

Bibliographic references

  • Deposit

    Reed and Wells, 1938, USGS BULL. 886-C

  • Deposit

    BAILEY, E.H., USGS, PERSONAL FILES

  • Deposit

    Chester, 1965, USBM IC-8252, P. 85.

  • Deposit

    THOENEN, ARK MINERAL BOOK

  • Deposit

    BROWN, W.F., ET AL., 1955, MINERAL RESOURCES OF ARK IN RED RIVER BASIN.

  • Deposit

    Clardy, B.F., and Bush, W.V., 1976, Mercury district of southwest Arkansas: Arkansas Geological Commission Information Circular 23, 57 p.

General comments

Subject category Comment text
Deposit CINNABAR IS DISSEMINATED IN SANDSTONE AND CONCENTRATED ALONG FAULT PLANES.

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-09-01 Bergquist, Joel R. U.S. Geological Survey
Editor 2012-11-16 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate record 10138406
Reporter 1983-11-17 Reynolds U.S. Bureau of Mines MAS 0050610004 = 10138406