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Renfro group (Roman Eagle shaft; Pinal Development Co. claims), Dripping Springs, Dripping Springs District, Dripping Spring Mts, Gila Co., Arizona, USA

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A former underground Cu-Au-Ag mine located on 47 claims (1922), in the NW¼NW¼ sec. 25, T3S, R14E, about 1 mile W of Dripping Springs and 1 mile NNW of Manhattan Mountain, 1¼ miles E of Troy Ranch and ¼ mile E of the Pinal County line, on BLM-administered land. Produced 1913-1918. The Pinal Development Company and Mr. F.M. Pool were past operators.

Mineralization is a 15 foot thick ore horizon on limestone, hosted in the Mescal Limestone and diabase. Ore control was a diabase-limestone contact with the diabase underlying the limestone; also along small fault fissures. Ore concentration was along the small shear zones with the mineralization associated with a Lower Cretaceous-Tertiary intrusive period. An associated rock unit is rhyodacite.

Area structures include the Late Cretaceous Rattler Granodiorite intrusion, which is 1/8 mile W of the mine. Mineralization and/or fissuring is probably related to this intrusion. The rhyodacite post-dates this intrusion. The downthrown side on most of the fractures in the area is the southern side.

Workings total 762 meters in length and include a main tunnel 1600 feet long, and a depth of 600 feet (Mines Handbook, 1922). The ADMR report (1907) describes various small shafts. There are 220 feet of workings on the Golden Eagle claim, A 150 foot tunnel, and a 43 foot deep shaft in granite.

Mineral List



2 entries listed. 2 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Weed, W.H. (1916) The Mines Handbook, Vol. XII : 922.

Arizona Mining Journal (1920), March 1920: 20.

Arizona Mining Journal (1920), April 1920: 32.

Weed, W.H. (1922) Mines Handbook vol. XV: 364-369.

USGS Geologic Quadrangle GQ-10218 (1971) (Sonora Quadrangle).

U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology file data.

Arizona Department of Mineral Resources Renfro group file.

MRDS database Dep. ID #10109792, MRDS ID #M241244; and Dep. ID #10258055, MAS ID #0040070579.

Mineral and/or Locality  
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