Union Mine

The Union Mine is a gold mine located in Yavapai county, Arizona at an elevation of 5,561 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

Name: Union Mine  

State:  Arizona

County:  Yavapai

Elevation: 5,561 Feet (1,695 Meters)

Commodity: Gold

Lat, Long: 34.47972, -112.30972

Map: View on Google Maps

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.


Satelite image of the Union Mine

Mine Description

The Union mine is about 1 3/4 miles southwest of McCabe, in the upper part of Chaparral Gulch, at an elevation of approximately 5,000 feet.

This deposit, which became known in the late sixties, at one time was consolidated with the Little Jessie. Except for a little intermittent work and small production, the property has been practically idle for many years. Early in 1934, the Union and Jessie mines were reported to be held by the Arizona Consolidated Mining Company which was carrying on development work and installing new milling machinery.

The workings include a 1,200-foot tunnel, with more than 1,000 feet of drifts on the vein, and a 200-foot shaft sunk from the tunnel level. The vein, which is a continuation of the Lelan vein, strikes about N. 70° E., dips steeply southeastward, and is followed by a later unmineralized basic dike. The ore consists of massive glassy quartz, up to 10 feet thick, with irregularly disseminated pyrite, arsenopyrite, sphalerite, and galena. Where cut on the tunnel level and on the 77-foot level of the shaft, the ore shoot is reported to be 250 feet long, with a pitch of about 30° SW. The lower limit of the ore is reported to be about half an ounce in gold per ton. Except in the oxidized zone, which is shallow, the gold does not occur free.

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

Union Mine MRDS details

Site Name

Primary: Union Mine
Secondary: Union-Jessie
Secondary: Jessie Mine


Commodity

Primary: Gold
Secondary: Lead
Secondary: Zinc
Tertiary: Arsenic


Location

State: Arizona
County: Yavapai
District: Ticonderoga District


Land Status

Not available


Holdings

Not available


Workings

Type: Unknown


Ownership

Owner Name: Arizona Consolidated Mining Co.
Years: 1930 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1895
Discovery Year: 1897
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

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


Mineral Deposit Model

Not available


Orebody

Form: TABULAR


Structure

Type: R
Description: Foliation In Precambrian Country Rocks Trends N25e

Type: L
Description: Veins Tend To Parallel Foliation


Alterations

Alteration Type: L
Alteration Text: None


Rocks

Name: Rhyolite
Role: Host
Age Type: Host Rock
Age in Years: 74.000000+-2.000000
Dating Method: K-Ar
Age Young: Tertiary
Age Old: Late Cretaceous

Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age in Years: 74.000000+-2.000000
Dating Method: K-Ar
Age Young: Tertiary
Age Old: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous


Analytical Data

Analytical Data: PROBABLE PRODUCTION OF $800,000 OF GOLD. GOLD ASSOCIATED WITH SULFIDE MINERALS


Materials

Ore: Sphalerite
Ore: Gold
Ore: Galena


Comments

Comment (Deposit): Discovery Year: LATE 1890'S

Comment (Development): THE MAIN WORKINGS OF THE UNION MINE ARE ON THE UNION UNPATENTED CLAIM. PART OF THE UNION MINES PRODUCTION MAY HAVE BEEN RECORDED WITH THE LITTLE JESSIE. NO USBM-ABGMT PRODUCTION DATA

Comment (Deposit): BASIC DIKE INTRUDES ALONG QUARTZ VEIN. TWO MAIN VEINS APPEAR IN WORKINGS: UNION VEIN (SOUTHEAST) AND BLAINE VEIN (NORTHWEST). BLAINE STRIKES N50E, 75 NW AND MAY BE YOUNGER THAN UNION VEIN

Comment (Workings): 1800 FT LONG ADIT ORIENTED N S. MAIN WORKINGS ORIENTED NE-SW

Comment (Geology): DEPOSIT IS VEIN AND/OR DIKE-VEIN OF RHYOLITE PORPHYRY WHICH CUTS GRANODIORITE PLUTON.

Comment (Location): LITTLE JESSIE MINE IS SEPARATE FROM UNION (JESSIE) MINE AND IS 1700 FEET SOUTH-SOUTHEAST OF THE UNION MINE. UTM COORDINATES TO MAIN SHAFT (NOT SHOWN ON 7 1/2' TOPO MAP) OF UNION. A CROSSCUT TUNNEL TRENDS NNW AND CROSSES THE MAIN WORKINGS WITH ITS MOUTHS ON THE ARIZONA CLAIM TO THE NORTH AND THE INDEPENDENCE CLAIM TO THE SOUTH. THE TUNNEL IS APPROXIMATELY 1800 FT LONG.


References

Reference (Deposit): USGS BULL 782, P. 133-134

Reference (Deposit): USBM I.C. 6905, P. 49

Reference (Deposit): ABM BULL 137, P. 37

Reference (Deposit): ABGMT CLIPPINGS FILE


Arizona Gold

Where to Find Gold in Arizona

"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.