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
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.
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" 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.
