Davis-Dunkirk Mine

  

Mine Info

State: Arizona

County: Yavapai

Elevation: 7,201 feet (2,195 meters)

Primary Mineral: Gold, Silver

Lat, Long: 34.41639, -112.44806



Mine Description

The Davis-Dunkirk mines, held by Davis-Dunkirk Mines, Inc., is on the western slope of the Bradshaw Mountains, near the head of Slate Creek. By road, the main camp, at the mill, is 14 miles from Prescott and 3 miles west of the Senator Highway. As the elevation at the camp is about 6,400 feet and on part of the road over 7,000 feet, communications in winter are sometimes hampered by Snow.

These veins were located in the sixties or early seventies of the past century. Raymond, in 1874, stated that: “Seven and a half tons of ore from the Davis mine near Prescott have been shipped to San Francisco and yielded $618.75 or $88.50 per ton. This vein is only opened by a few holes from 5 to 10 feet deep.”(47) Little other historical data for the mine are available, but its production prior to 1922(48) is said to have been about $200,000. In 1925, the property was obtained by Davis-Dunkirk Mines, Inc., which subsequently built a new camp and a 120-ton flotation mill. Regular operations, employing about twenty men, began in August, 1933, and yielded fifteen cars of concentrates up to January 10, 1934.

Here, the steep-sided canyon of Slate Creek exposes moderately fissile pre-Cambrian schist, intruded by stocks and dikes of granodiorite and diorite and a few dikes of rhyolite-porphyry. The mine workings are mainly in schist which, a short distance farther west, is intruded by a large stock of granodiorite and, on the southeast, by diorite.

The Dunkirk vein occurs within a fault fissure that strikes northeastward and dips nearly vertically southeastward. As seen on the lowest adit level, its thickness ranges from a few inches to about 3 feet. The filling is mainly coarse-grained grayishwhite quartz with abundant pyrite and chalcopyrite. In places, coarsely crystalline pale-pinkish ankerite is the principal gangue. Rather intense sericitization and silicification are apparent in the wall rock. The richer gold and silver ore shoots, as indicated by several old stopes above this adit, tend to be somewhat irregular in form and distribution. The silver content is asserted to be decreasing with depth. At a point approximately 1,400 feet in from the portal, the vein separates into two branches about 45° apart. In January, 1934, ore was being mined from workings at the bottom of a 100-foot winze sunk at this point. According to H. L. Williams, (49) manager of the property, the mill concentrates from this ore averaged about one ounce in gold and 62 ounces in silver per ton.

The left branch of the vein continues northeastward, towards the old Davis mine. Ore from the upper levels of this mine was described by Lindgren (50) as consisting of fine-grained, druzy quartz with sparse pyrite and yellow sphalerite, with abundant grains of proustite and polybasite. He regarded this vein as of the shallow-seated type, but the Dunkirk vein belongs distinctly to the mesothermal type.

Workings on the Davis-Dunkirk property consist of more than 6,000 feet of adits, raises, stopes, and winzes, distributed over about four claim-lengths and with a vertical range of 1,600 feet.

(47) Raymond, R. W., Statistics of mines and mining in the states and territories west of the Rocky Mountains, p. 347. Washington, 1874.

(48)Lindgren, W., work cited, p. 119.

(49)Oral communication.

(50)Work cited, p. 119.

Text from Arizona Lode Gold Mines and Gold Mining, Arizona Bureau of Mines. Original 1934, revised 1967

Davis-Dunkirk Mine MRDS details

Site Name

Commodity

Location

Primary: "Davis-Dunkirk Mine"
Secondary: "Van Hook, Davis, Murphy, Dunkirk, Poverty, Davis-Dunkirk Mines No. 1"
Secondary: "Claims Include Dunkirk, West Dunkirk, Kentucky, Judge, Margery, Keno,"
Secondary: "Retort, Cresent, Indiana, Douglas, General Otis, Captain Lyman"
Primary: Gold
Primary: Silver
Secondary: Lead
Secondary: Copper
Secondary: Zinc
State: Arizona
County: Yavapai
District: Mt. Union District
 

Land Status

Holdings

Workings

Land ownership:
Administrative Organization:
Type: Underground


Ownership

Production

Deposit

Owner Name: Van Hook Mining Co. , Casparic , Lookout Copper Co. , Castle Copper Co.
Company ID:
Percent:
Home Office:
Info Year:
Years: 1918 - 1926

Owner Name: Davis Mine-Clark , Caspari , Davis-Dunkirk Inc. ,Bradshaw Mines, In
Company ID:
Percent:
Home Office:
Info Year:
Years: 1900 - 1907

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Plant Type:
Plant Subtype:
Operation Type: Unknown
Mining Method:
Milling Method:
Year First Production: 1874
Year Last Production: 1961
Discovery Year: 1869
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

Mineral Deposit Model

Orebody

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland
Physiographic Detail:
Name:
Form: TABULAR


Structure

Alterations

Rocks

Type: R
Structure:
Description: Foliation In Precambrian Rocks Trends N25e
Type: L
Structure:
Description: Dikes And Veins Parallel Foliation
Alteration Type: L
Alteration:
Alteration Text: None To Minor Silicification In Wall Rocks
Name: Meta-Basalt
Role: Associated
Description:
Age Type: Associated Rock Unit
Age in Years: 1720.000000+-
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Proterozoic
Age Old:
Name: Meta-Basalt
Role: Associated
Description:
Age Type: Host Rock Unit
Age in Years:
Dating Method:
Material Analyzed:
Age Young: Paleoproterozoic
Age Old:
Name: Meta-Basalt
Role: Associated
Description:
Age Type: Host Rock
Age in Years:
Dating Method:
Material Analyzed:
Age Young: Paleoproterozoic
Age Old:
Name: Amphibolite
Role: Host
Description:
Age Type: Host Rock Unit
Age in Years: 1760.000000+-
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Proterozoic
Age Old:


Analytical Data

Materials

Ore: Silver
Ore: Proustite
Ore: Gold
Ore: Chalcopyrite
Ore: Polybasite
Ore: Sphalerite
Ore: Argentite
Gangue: Ankerite
Gangue: Quartz
Unknown: Pyrite


Comments

Comment Type:
Deposit
Comment Discovery Year: 1869 (POVERTY)
Comment Type:
Deposit
Comment TWO MAIN VEINS CALLED THE DAVIS AND THE DUNKIRK. AT MOUTH OF TUNNEL ON THE NEW ERA CLAIM (DAVIS MINE), ONLY ONE VEIN IS PRESENT. THIS VEIN PERSISTS FOR 1400 FT TO THE NE, WHERE IT SPLITS INTO THE NORTHWESTERN SEGMENT, THE DAVIS VEIN, AND THE SOUTHEASTERN SEGMENT, THE DUNKIRK VEIN. DEPOSIT IS VEIN WHICH CUTS PRECAMBRIAN METAVOLCANIC AND METASEDIMENTARY ROCKS.
Comment Type:
Workings
Comment 23 TUNNELS ALONG THE STRIKE OF THE VEIN. 13,000 FT ON VEIN, OVER 8,000 FT OF DRIFTS ON THE VEIN AND 3,000 FT OF RAISES AND SHAFTS. THE PORTALS OF THE TUNNELS VARY IN ELEVATION FROM 6200 TO 7600 FT.
Comment Type:
Geology
Comment RHYOLITE PORPHYRY DIKES OF PROBABLE LCRET-TERT AGE ASSOCIATED WITH VEINS. GOVERNMENT CANYON GRANODIORITE OUTCROPS 0.15 MILES NORTHWEST OF MAIN WORKINGS.
Comment Type:
Deposit
Comment THIS RECORD CONTAINS DATA FROM DUPLICATE RECORD D002838 OF J.W. HASLER WHICH HAS BEEN DELETED FROM MAIN MRDS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Comment Type:
Deposit
Comment IN 1918 THE POVERTY, DAVIS, AND DUNKIRK ARE SEPERATE MINES THAT WERE LATER GROUPED TOGETHER. LISTED AS CLAIMS OF THE DAVIS-DUNKIRK AREA, DUNKIRK, WEST DUNKIRK, KENTUCKY JUDGE, MARGERY, KENO, RETORT, CRESENT, INDIANA, DOUGLAS, GENERAL OTIS AND CAPTAIN LYMAN.
Comment Type:
Location
Comment UTM TAKEN TO ADIT IN SECTION 3; ADIT IN SECTION 2 PART OF THE MINE. OLD DAVIS MINE WAS WORKINGS ON NEW ERA CLAIM IN CENTER OF SEC. 3. DUNKIRK MINE WAS WORKINGS ON DUNKIRK CLAIM IN NE PART OF SEC. 3 AND NW PART OF SEC. 2. UTM COORDINATES FOR DAVIS-DUNKIRK ARE TO LOWEST TUNNEL ON DUNKIRK CLAIM IN NORTHEAST PART OF SEC. 2
Comment Type:
Development
Comment MAIN WORKINGS ARE ON THE NEW ERA AND DUNKIRK PATENTED CLAIMS


References

Reference Category:
Deposit
Pages:
Reference: USBM-ABGMT FILE DATA.
URL:
Reference Category:
Deposit
Pages:
Reference: AZ DEPT MIN RES FILE DATA.
URL:
Reference Category:
Deposit
Pages:
Reference: ABGMT CLIPPINGS FILE DATA.
URL:
Reference Category:
Deposit
Pages:
Reference: USGS BULL 782, P. 119.
URL:
Reference Category:
Deposit
Pages:
Reference: YAVAPAI MAGAZINE, 1918 V. VI, NO. 8, P. 6.
URL:
Reference Category:
Deposit
Pages:
Reference: USGS GEOLOGIC QUADRANGLE MAP GQ-997.
URL:
Reference Category:
Deposit
Pages:
Reference: UNIVERSITY OF ARIZONA BULLETIN 137.
URL:
Reference Category:
Other Database
Pages:
Reference: CIMRI
URL:

Did You Know.......

A mine is a hole in the ground, owned by a liar.
-Mark Twain

About The MRDS Mines Database

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.

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