Documentation of Uranium Assays referenced in EPA TENORM report—Pima and Santa Cruz Counties, Arizona
Section A: Site Identification #, Mine Name, Location, Physical Description, Mineralogy, and References
Pima County :
V38. Sure Fire No. 1. Sec. 15, T. 13 S., R. 18 E. Pima County. Radioactive minerals (uranophane and autunite) associated with quartz-fluorite and minor copper in leached, crushed and altered precambrian schist. Samples indicate 0.002 to 0.008 percent uranium. Prospect pits. (Granger and Raup, 1962).
V40. Copper Squaw. Sec. 19, T. 14 S., R. 2 E. Pima County. Unidentified uranium mineralization associated with oxidized copper and iron in vein in altered andesite. Selected samples ran 0.76 and 1.4 percent eU, but may have other radioactive elements besides uranium. Old copper property . (Wells and Putluck, 1953, AEC PRR A-P-102).
V42. Black Dike. Secs. 23, 24, 25 and 26, T. 17 S., R. 10 E. Pima County. Pitchblende and manganese oxide along fractures and in contact metamorphized granite along basaltic dike. Associated copper mineralization and fluorite. Assays showed 0.011 to 0.16 percent uranium. Shaft. (Granger and Raup, 1962).
V44. Diamond Head group. Sec. 34, T. 17 S., R. 11 E. Pima County. Uraninite associated with iron and copper sulfides and hematite, in fault vein structure cutting intrusive. Assays of 0.22 and 0.74 percent uranium reported but average much lower. Adits and pits. (Millerand Miller, 1956, AEC PRR A-94).
V45. Escondida. Sec. 34, T. 17 S., R. 11 E. Pima County. Uraninite with iron and copper sulfides in contact zone along basic dike intruding granitic rock. Select samples ran 0.03 to 0.06 percent eU. Pits. (Miller, 1955, AEC PRR A-35).
V49. Esperanza mine. Secs. 8, 9, 16 and 17, T. 18 S., R. l2 E. Pima County. Uraninite and secondary uranium minerals associated with molybdenite and copper minerals in New Year s Eve mine and in veinlets in porphyry copper deposit. Assays of old ore stockpile ran 0.111 to 0.182 percent eU. Shaft and open pit. (Robison, 1954, AEC PRR A-P-255; Lynch, 1968).
V50. King mine. E. Central Sec. 24, T. 18 S., R. 15 E. Pima County. Pitchblende with iron and copper sulfides and quartz-calcite gangue in pockets along limestone quartz monzonite contact. Samples assayed 0.14 to 0.93 percent eU. Old silver-copper mine. (Miller, 1955, AEC
V51. Gismo group. Sec. 5 T. 21 S., R. 10 E. Pima County. Sooty uraninite, kasolite and schroeckingerite identified with copper and iron mineralization in fault-fissure vein in granite. Samples assayed 0.12 to 0.30 percent eU. Old gold-silver mining area. (Magleby, 1957, AEC PRR A-114).
Santa Cruz County :
V54. Alto group (Gold Tree, El Plomo). SE. 1/4 Sec. 12, N. _ Sec. 13, T. 21 S., R. 14 E. Santa Cruz County. Very fine uraninite crystals on cross-fractures in quartz-latite agglomerate. Assay showed 0.07 percent eU. Old silver- base metal mine . (Miller and Robison, 1955, AEC PRR A-P-360).
V56. Cracker Jack group. Sec. 29, T., 21 S,., R. 15 E, Santa Cruz County . Pitchblende associated with base sulfide mineralization in fissure veins cutting quartz latite. Assays up to 0.07 percent eU. Prospect pits. (Miller, 1955, AEC PRR A-39).
V57. Grandview group. N. Center Sec. 20, T. 22 S., R, 10 E. Santa Cruz County. Kasolite with iron and copper oxides in vein cutting silicified volcanics. Samples assayed up to 0.076 percent eU. Shaft and open cut. (Reyner and Robison, 1955, AEC PRR A-P-319).
V58. Little Doe. Sec. 20, T. 22 S., R. 10 E. Santa Cruz County. Gummite and kasolite with iron and copper oxides in fracture zones in volcanics. Samples assayed 0.036 to 0.125 percent uranium. Old workings. (Webb and Coryell, 1952, AEC PRR A-SL-3; Miller and Weathers, 1953, AEC PRR A-SL-3 Suppl.).
V61. Annie Laurie. SE. 1/4 Sec. 1, T. 23 S., R. 11 E. Santa Cruz County. Pitchblende and secondary uranium minerals associated with base sulfide and oxides in shear fractures in altered granite and porphyry. Selected samples may be relatively high but average is close to 0.01 percent uranium. Prospect pits. (Granger and Raup, 1962).
V62. White Oaks mine ( Clark mine). NE. l/4 Sec. 2, T. 24 S., R. 12 E. Santa Cruz County. Kasolite, uranophane, dumontite, autunite, and uranium-bearing pyromorphite with oxidized lead and copper minerals in fissures and gouge of shear zone in rhyolite volcanics. Selected samples assayed up to 0.02 percent uranium, but average much lower. Adits and pits. (Granger and Raup, 1962).