Gap Ridge Mine

Past Producer in Pike county in Arkansas, United States with commodities Mercury, Antimony, Silver, Arsenic, Zinc

Geologic information

Identification information

Deposit ID 10103773
MRDS ID M055055
MAS/MILS ID 51090035
Record type Site
Current site name Gap Ridge Mine
Related records 10138645

Geographic coordinates

Geographic coordinates: -93.74056, 34.16056 (WGS84)
Elevation 189
Relative position 4.5 MI NNW OF MURFREESBORO
(click for info)

Geographic areas

Country State County
United States Arkansas Pike

Public Land Survey System information

Meridian Township Range Section Fraction State
5th Principal 007S 026W 11 SW NE Arkansas

Commodities

Commodity Importance
Mercury Primary
Antimony Secondary
Silver Secondary
Arsenic Secondary
Zinc Tertiary

Comments on the commodity information

  • SPHALERITE OCCURS AT DEPTH BELOW A FAULT AND IS NOT APPARENTLY ASSOCIATED WITH CINNABAR

Materials information

Materials Type of material
Calomel Ore
Cinnabar Ore
Metacinnabar Ore
Sphalerite Ore
Stibiconite Ore
Dickite Gangue
Goethite Gangue
Pyrite Gangue
Quartz Gangue
Siderite Gangue
Stibnite Unknown

Alteration

  • (Local) Argillic

Analytical data

Result ONLY TRACES OF AS AND AG OCCUR. ORE AVERAGED 11.2 TO 12 LB HG PER TON

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Gap Ridge Sandstone Member Of Stanley Shale. Penn. Sandstone
    Rock description Gap Ridge Sandstone Member Of Stanley Shale. Penn. Sandstone
    Stratigraphic age (youngest) Pennsylvanian
    Stratigraphic age (youngest) Pennsylvanian

Nearby scientific data

(1) -93.74056, 34.16056

Geologic structures

Type Description Terms
Local Thrust Faults And Close Folds
Regional Steep Regional S Dip To Carboniferous Formations. Overthrust Block Cut By Ne Tear Faults, Bedding Plane Faults, And N-S Faults With West Side Moving Relatively North, Two Types Of Small Folds Formed By E-W Compression. ; Reg.Trends: Thrust Faulting From S In Late Paleozoic.

Ore body information

  • General form TABULAR
    Strike N 8 E
    Dip 65 TO 70 W

Controls for ore emplacement

  • Cinnabar Deposition Controlled By Fractures. Fault Intersections, Sharp Folds, Intersection Of Sandstone Beds With Main Fault Zone.

Comments on the geologic information

  • GEOL.DESC: SERIES OF STEP-LIKE MINERALIZED FRACTURES (STRIKE N 8 E, DIP 65-70W) OFFSET SANDSTONE WHICH IS MINERALIZED. ORE IS RICHEST IN BRECCIATED AREAS CARBONIFEROUS FORMATIONS DIP S AND ARE DEFORMED BY THRUST FAULTS, TEAR FAULTS, BEDDING PLANE FAULTS, AND FOLDS

Economic information

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1931
Discovery method Ore-Mineral In Place

Mining district

District name Arkansas Quicksilver District

Ownership information

  • Type Owner
    Owner Arkansas Quicksilver Mines, Inc.
    First year 1941
  • Type Owner
    Owner G.J. Parker
    Home office "Fee owner"
    Year 1938
  • Type Unknown
    Owner Southwestern Quicksilver Co.
    Year 1938
  • Type Unknown
    Owner Leo Yount
    Year 1942

Comments on the production information

  • PRODUCTION IS COMBINED GAP RIDGE & EAST GAP RIDGE MINE

Comments on the reserve resource information

  • POOR CHANCE FOR FUTURE PRODUCTION. SOME RESERVES OF LESS THAN 2 LB HG PER TON ROCK.

Workings at the site

  • Type of workings Underground
    Overall depth 79.25M
    Overall length 16.76M
    Overall width 1.83M
  • Type of workings Surface/Underground

Comments on the workings information

  • AS OF 1942, DEVELOPMENT CONSISTED OF SHAFT IS 260 FT. DEEP. CROSSCUT ON 225 FT. LEVEL, AND 260 FT. LEVEL. 1826 FT. OF TRENCHING WAS BULLDOZED. WINZES AND RAISES ARE ALSO CUT. TWO SHAFTS ON EAST END OF PROPERTY ARE 70 AND 130 FT. DEEP. LAST OPERATED 1944.

Comments on development

  • STOPE CLOSED IN 1934 BECAUSE OF SEEPAGE.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M055055
U.S. Bureau of Mines Minerals Availability System MAS 51090035 = newMRDS 10138645, merged and deleted.

Bibliographic references

  • Deposit

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

  • Deposit

    Gallagher, 1942, USGS BULL. 936-H

  • Deposit

    BAILEY, E.H., USGS, PERSONAL FILES

  • Deposit

    DIREXPL U.S. BUREAU MINES, DRILLIN

  • Deposit

    Chester, 1965, USBM IC-8252.

  • Production

    USBM DATA

  • 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 INDIVIDUAL SHOOTS ARE RICHER IN ORE ON SOUTH SIDES WHERE FAULT DISPLACEMENTS ARE LARGEST AND WHERE ROCK IS BRECCIATED. THE ORE BODY IS CUT OFF AT 230 FT BY A FAULT WHICH STRIKES NE AND DIPS 25 NW. MAY BE A PRE-ORE FAULT. THE TABULAR ORE BODIES ARE APPROX. 80 BY 8 BY 230 FT in a stope.

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-09-01 Bergquist, Joel R. U.S. Geological Survey
Editor 2012-11-15 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate record 10138645
Reporter 1980-05-20 Rlw U.S. Bureau of Mines MAS 0051090035 = 10138645