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Longfellow Mine

Producer in Greenlee county in Arizona, United States with commodities Copper, Kaolin, 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. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  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. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10048281
MRDS ID M800406
Record type Site
Current site name Longfellow Mine
Alternate or previous names Longfellow Incline, Part Ofarizona Copper Co Group
Related records 10209853

Geographic coordinates

Geographic coordinates: -109.35871, 33.08454 (WGS84)
Elevation 1494
Location accuracy 100(meters)
Relative position IN MORENCI OPEN PIT JUST NORTH OF MODOC MOUNTAIN., In Morenci Open Pit; Used Blm District Sheets 440 And 839; Usgs Professional Paper 43 (1905)

Site location context

Political divisions (FIPS codes)

Greenlee(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Clifton(quadrangle 1:24,000 scale)

Clifton(quadrangle 1:100,000 scale)

Clifton(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco(hydrologic unit)

Upper Gila(hydrologic accounting unit)

Upper Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Greenlee

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 004S 029E 16,15 NE OF SE (16); SE OF NE (16); W2 OF NW (15) Arizona

Comments on the location information

  • UPPER WORKINGS OF LONGFELLOW ORE BODY EXTEND OVER THE EAST YANKIE, LONGFELLOW, AND LONGFELLOW EXTENSION CLAIMS. ; INFO FROM LAND.ST :(1973)

Commodities

Commodity Importance
Copper Primary
Kaolin Primary
Silver Secondary
Gold Secondary

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Cuprite Ore
Kaolin Ore
Kaolinite Ore
Malachite Ore
Pyrite Ore
Sphalerite Ore
Epidote Gangue
Garnet Gangue
Hornblende Gangue
Limonite Gangue
Magnetite Gangue
Tremolite Gangue

Alteration

  • (Local) Sericitized Porphyry. Morenci Shale Shows Hardening And Introduction Of Epidote; Limestone Contains Seams Of Magnetite Intergrown With Pyrite, Chalcopyrite, And Prisms Of Pyroxene; Substantial Surface Oxidation To Limonite And Kaolin

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Coronado Quartzite;Morenci Granite Porphyry
    Rock description Coronado Quartzite;Morenci Granite Porphyry
    Stratigraphic age (youngest) Tertiary
    Chronological age 55.5
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Longfellow Limestone;Morenci Shale
    Rock description Longfellow Limestone;Morenci Shale

Nearby scientific data

(1) -109.35871, 33.08454
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ore Bodies In Region Tend To Follow Porphyry Contacts
Type of structure Local
Structure description Well-Defined Fault With Strike Of N65w And Upthrow On South Side Of 80 To 100 Ft; 3 Main Porphyry Dikes That Trend Ene, Widen Considerably With Depth (From 20 Ft Wide On Surface To 90 Ft Wide At Depth), And Send Out Horizontal Sheets In The Lower Part Of The Longfellow Limestone

Ore body information

  • General form IRREGULAR
    Width 121.92M
    Depth to bottom 121.92M
  • General form IRREGULAR

Controls for ore emplacement

  • Funnel-Shaped Mass Occurs Between 2 Large Porphyry Dikes; Irregular And Tabular Deposits Of Very Rich Oxidized Ores Along Contact Between Limestone And Porphyry

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Deposit size Medium
Significant No
Discovery year 1872
Discoverer Robert Metcalf
Year of first production 1882
Year of last production 1932

Mining district

District name Copper Mountain District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Phelps Dodge Corp., Morenci Branch (As Part Of Morenci Open Pit)
  • Type Owner
    Owner Phelps Dodge Corp., Morenci Branch

Comments on the production information

  • ABGMT-USBM PRODUCTION DATA INCLUDES THE DETROIT, HUMBOLDT, METCALF, CORONADO, YAVAPAI MAMMOTH, AND JOY MINES (ARIZONA COPPER CO MINES)

Workings at the site

  • Type of workings Surface/Underground
    Length 646.18M
    Overall depth 137.16M

Comments on the workings information

  • DEVELOPMENTS INCLUDED TUNNELS ON 4 LEVELS, STOPING, OPEN PIT MINING, ONE INCLINE WITH A VERTICAL RUN OF ABOUT 80 FT; THE SECTION OF THE LONGFELLOW WORKINGS THAT LIES ON THE EAST YANKIE CLAIM WAS DEVELOPED BY 4 LEVELS FROM THE EAST YANKIE SHAFT (DETROIT COPPER MINING CO OF ARIZONA); A 1300 FT TUNNEL DRIVEN FROM CHASE CREEK CONNECTS WITH A 600 FT BLIND SHAFT

Comments on development

  • OPERATORS INCLUDED LONGFELLOW EXTENSION COPPER CO, ARIZONA COPPER CO LTD LESZYNSKY BROTHERS, LONGFELLOW MINING CO; LONGFELLOW AND METCALF ORE BODIES WERE THE FIRST DEPOSITS DISCOVERED IN THE COPPER MOUNTAIN DISTRICT

Reference information

Bibliographic references

  • Deposit

    ABGMT-USBM FILE DATA.

  • Deposit

    USBM FILES, LONGFELLOW INCLINE.

  • Deposit

    ABGMT CLIPPING FILE, LONGFELLOW EXTENSION COPPER CO, ARIZONA COPPER CO LTD.

  • Deposit

    BLM DISTRICT SHEET 840 AND 839.

  • Deposit

    USGS PP 43, P. 233-239.

  • Deposit

    STEVENS, H.J., 1911, THE COPPER HANDBOOK, VOL X, PAGES 356-357, ARIZONA COPPER CO LTD.

  • Deposit

    WEED, W.H., 1918, THE MINES HANDBOOK, VOL. X111, PAGE 470, ARIZONA COPPER CO LTD.

  • Deposit

    TENNEY, JAMES B., HISTORY OF MINING IN ARIZONA, VOL. 1, P. 97.

  • Deposit

    BENNETT, 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE CO., AZ: MS THESIS UNIV OF AZ.

  • Deposit

    PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit PRINCIPAL STOPES BETWEEN THE NORTH AND MIDDLE DIKES DISPLAYED ESSENTIALLY CUPRITE WITH SMALL AMOUNTS OF MANGANESE DIOXIDE WHILE STOPES BETWEEN THE MIDDLE AND SOUTH DIKES SHOWED COPPER CARBONATES WITH LARGE AMOUNTS OF BLACK MANGANESE. PURE KAOLIN OCCURS EXTENSIVELY IN THE MINE. CU ORE BODIES NARROW WITH DEPTH.
Deposit SEE ALSO: EAST YANKIE MINE ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-81 Calder, Susan R. Arizona Bureau of Geology and Mineral Technology
Updater 01-APR-93 Orris, Greta J. U.S. Geological Survey

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.