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Korn Kob Mine

Past Producer in Pima county in Arizona, United States with commodities Copper, Molybdenum, Tungsten, Iron, Zinc, Silver, Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Reserves and resources
  20. Workings at the site
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10095027
MRDS ID M000134
Record type Deposit
Current site name Korn Kob Mine

Geographic coordinates

Geographic coordinates: -110.57762, 32.38733 (WGS84)
Elevation 1055
Relative position 18 MI ENE OF TUCSON IN BUCHMAN CANYON, 5 MI N OF REDDINGTON PASS.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Buehman Canyon(quadrangle 1:24,000 scale)

Tucson(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower San Pedro(hydrologic unit)

San Pedro-Willcox(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 012S 017E 14,15,23 S OF CENTER (14); N OF CENTER (15); N CENTER (23) Arizona

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Tungsten Critical Primary
Iron Secondary
Zinc Critical Secondary
Silver Secondary
Gold Secondary

Comments on the commodity information

  • Molybdenite Is Near And Replacing Garnet, Powellite Is Reaction Rim Around Molybdenite.

Materials information

Materials Type of material
Chalcopyrite Ore
Chrysocolla Ore
Malachite Ore
Molybdenite Ore
Powellite Ore
Scheelite Ore
Tenorite Ore

Alteration

  • (Local) Skarns; Sericitization, Silicification, Quartz-Epidote-Muscovite Veining

Analytical data

Result 0.1-2.0% CU IN SKARN. 50 PPM MO. 100-1700 PPM ZN. 1-12 PPM AG, TRACE AU.

Mineral occurrence model information

Model code 58
USGS model code 18a
Deposit model name Porphyry Cu, skarn-related
Mark3 model number 9

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Catalina Granite ;Leatherwood Quartz Diorite-Major Mineralizer Of Skarns
    Rock description Catalina Granite ;Leatherwood Quartz Diorite-Major Mineralizer Of Skarns
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Abrigo Formation; Martin Formation
    Rock description Abrigo Formation; Martin Formation

Nearby scientific data

(1) -110.57762, 32.38733
ListMap

Economic information

Ore body information

  • Name Korn Kobb
    General form Oxide copper

Controls for ore emplacement

  • Skarn Permeability. Post Mineralizing Fractures Important For Secondary Copper Minerals

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1910
Mining method Open Pit
Year of first production 1913
Year of last production 1942
Milling method Leach-Solvent-Extract-Electrowin

Mining district

District name Redington District

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Ketstone Minerals
    Interest 100
    Home office Arizona
    Year 1996
    First year 1995
  • Type Lessor
    Owner Corner Bay Silver Inc
    Interest 51
    Year 1996
    Last year 1995
  • Type Lessee/Operator
    Owner Gold Giants Ventures Inc.
    Interest 49
    Year 1996
    Last year 1995

Production statistics

  • Year 1942
    Period 1913-1942
    Ore mined 100mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Secondary Ag Silver Silver 4665.52g
    Primary Cu Copper Copper 5.44mt

Reserves and resources

  • Type In-situ
    Estimate year 1995
    Reserves 25400000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.41 wt-pct Copper Primary 1995
  • Type In-situ
    Estimate year 1995
    Reserves 28000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.41 wt-pct Copper Primary 1995

Workings at the site

  • Type of workings Underground
    Length 1188.72M
    Overall depth 39.62M

Comments on the workings information

  • 130 Ft Shaft And Tunnels With 3900 Ft Of Workings On 2 Levels

Comments on development

  • Developed Around 1910

Reference information

Bibliographic references

  • Reserve-Resource

    Anonymous, 1995, Corner Bay acquires Arizona copper play; The Northern Miner, June 12 issue, p. 15.

  • Deposit

    Keith, 1974, Abm Bull 189, P. 141.

  • Development

    Metals Economics Group (MEG) has a webpage on the Korn Kob mine with some details about reserves and drilling. Accessed on 8/16/2010.
    http://www.metalseconomics.com/

  • Reserve-Resource

    Randol 1996

  • Deposit

    Wilson, 1977, M.S. Thesis Univ Of Az 103 P.

  • Reserve-Resource

    Keith and others, 1983

  • Deposit

    Creasey and Theodore, 1975, USGS Open-File Report 75-295.

  • Deposit

    Wilt, J.C., Keith, S.B., Theodore, T.G., 1984, A listing and map showing molybdenum occurrences in Arizona: USGS Open-File Report 84-830, 62 p plus map. Accessed 21-JUL-2009. http://www.janrasmussen.com/pdfs/MO%20in%20AZ%20usgs%2084_830%20rot.pdf

  • Other Database

    Cimri

General comments

Subject category Comment text
Deposit Molybdenite disseminated in skarn near garnet in polymetamorphosed Abrigo and Martin Formations probably mineralized by Laramide (65-70 m.y.-old) Leatherwood quartz diorite. Later fracturing localized secondary copper minerals. (Wilt et al, 1984)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-83 Peterson, Jocelyn A. U.S. Geological Survey
Reporter 02-NOV-83 ADMR U.S. Bureau of Mines
Updater 21-JUL-09 Anderson, Claire U.S. Geological Survey
Editor 16-AUG-10 Schruben, Paul U.S. Geological Survey Fixed OFR reference and typo in quote from that reference. Attributed quote.

Beyond USGS

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

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.