Longfellow Mine

The Longfellow Mine is a kaolin and copper mine located in Greenlee county, Arizona at an elevation of 4,902 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Longfellow Mine
Secondary: Longfellow Incline
Secondary: Part Ofarizona Copper Co Group

Commodity

Primary: Kaolin
Primary: Copper
Secondary: Silver
Secondary: Gold

Location

State: Arizona
County: Greenlee
District: Copper Mountain District

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Surface/Underground

Ownership

Owner Name: Phelps Dodge Corp., Morenci Branch

Owner Name: Phelps Dodge Corp., Morenci Branch (As Part Of Morenci Open Pit)

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1882
Year Last Production: 1932
Discovery Year: 1872
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland

Mineral Deposit Model

Not available

Orebody

Form: IRREGULAR

Form: IRREGULAR

Structure

Type: R
Description: Ore Bodies In Region Tend To Follow Porphyry Contacts

Type: L
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

Alterations

Alteration Type: L
Alteration Text: 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

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 55.500000+-0.500000
Age Young: Tertiary

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Kaolin
Ore: Chalcocite
Ore: Kaolinite
Ore: Cuprite
Ore: Malachite
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Garnet
Gangue: Hornblende
Gangue: Epidote
Gangue: Tremolite
Gangue: Limonite
Gangue: Magnetite

Comments

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

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

Comment (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

Comment (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.

Comment (Workings): 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

Comment (Deposit): SEE ALSO: EAST YANKIE MINE ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

References

Reference (Other Database): CIMRI

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

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

Reference (Deposit): TENNEY, JAMES B., HISTORY OF MINING IN ARIZONA, VOL. 1, P. 97.

Reference (Deposit): WEED, W.H., 1918, THE MINES HANDBOOK, VOL. X111, PAGE 470, ARIZONA COPPER CO LTD.

Reference (Deposit): USGS PP 43, P. 233-239.

Reference (Deposit): STEVENS, H.J., 1911, THE COPPER HANDBOOK, VOL X, PAGES 356-357, ARIZONA COPPER CO LTD.

Reference (Deposit): BLM DISTRICT SHEET 840 AND 839.

Reference (Deposit): ABGMT CLIPPING FILE, LONGFELLOW EXTENSION COPPER CO, ARIZONA COPPER CO LTD.

Reference (Deposit): ABGMT-USBM FILE DATA.

Reference (Deposit): USBM FILES, LONGFELLOW INCLINE.

Arizona Gold

"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.