Ref.: Wilson, E.D. (1941), Tungsten Deposits of Arizona, Geological Series No. 14, Arizona Bureau of Mines Bull. 148:
Lemmon, D.M. (1945), Tungsten Deposits of Arizona, USGS unpublished data.
Dale, V.B., Stewart, L.A., and McKinney, W.A. (1960), Tungsten deposits of Cochise, Pima, and Santa Cruz Counties., Arizona, U.S. Bureau of Mines Report of Investigation 5650.
Sheikh, A.M. (1970) Geology and ore deposits of Las Guijas tungsten district, Pima County, Arizona: Economic Geology: 65(7): 875-882.
MRDS database Dep. ID file #10039535, MRDS ID #M050237.
A former small underground W-Ag-Au-Pb-Cu mine located in sec. 31, T20S, R10E, about 2 miles southeast of Las Guijas on the north side of the Las Guijas Mountains. Discovered 1892. Produced 1941. Owned by G.A. Prandini and J.A. Zappia. Operated by Frank Zappia, Don Lieberman Enterprises, Inc. and then Lemas.
Mineralization is ore in irregular, pinch and swell deposits in quartz lenses in irregular fracture zone through a granitic formation; exposed for 800 feet along the strike. Ore control was volcanic breccia at the contact with andesite. Alteration was iron and coopper stains. Wall rock is altered to sericite.
Structural trends and allignments are the same as others in the Las Guijas group, but mineralization is in volcanic breccia and not in granite or contact. Ore shoots are sporadic and separated by barren lenses.
Local structures include cross-faulting and post-mineralization lamprophyre dike intrusions.
This mine was first located for silver; it was subsequently abandoned and relocated several times. Sheikh (1970) says that Huebnerite, scheelite and sulfides are absent.
Workings include 3 adits and some stopes and are 33.53 meters deep.
|
|
|
Map Reference: 31°38'53"N , 111°21'51"W
Important Disclaimer: 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.
Switch between Map and Globe
|
