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Sure Fire No. 1 claim (Sure Fire claim; Vanover property), Bar-LY Ranch, Redington District, Santa Catalina Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 32° 18' 9'' North , 110° 29' 48'' West
Latitude & Longitude (decimal): 32.30250,-110.49667
Other regions containing this locality:Sonoran Desert, North America
Köppen climate type:BSk : Cold semi-arid (steppe) climate


‡Ref.: Wilmarth, V.R., Bauer, H.L., Jr., Staatz, M.H., and Wyant, D.G. (1952) Uranium in fluorite deposits, in Selected papers on uranium deposits in the United States: U.S. Geological Survey Circular 220: 13-18.

McKelvey, V. (1955), A search for uranium in the United States, USGS Bull. 1030-A: 26-27.

Granger, H.C. & R.B. Raup (1962), A reconnaissance study of uranium deposits in Arizona, USGS Bull. 1147-A: A34-A36.

Van Alstine, R.E. and Moore, R.T. (1969) Fluorspar, in USGS & Arizona Bureau of Mines & U.S. Bureau of Reclamation, Mineral and Water Resources of Arizona, Arizona Bureau of Mines Bull. 180 (USGS Bull.871): 353.

U.S. Atomic Energy Commission RME-159 (1970) Preliminary Reconnaissance for Uranium in Pima and Pinal Counties, Arizona, 1950 to 1957: 49-50.

Elevatorski, E.A. (1971), Arizona Fluorspar, Arizona Department of Mineral Resources, U.S. Bureau of Mines Report of Investigation 5651: 19-24.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.

MRDS database Dep. ID file #10039665, MRDS ID #M050616; and, Dep. ID #10234349, MAS ID #0040190031.

A U-Cu-Fluorspar claim/occurrence located in N½SW¼ sec. 15, T.13S., R.18E., 8½ miles S of Redington and about 30 miles ENE of Tucson. Discovered August, 1949 by Dominick Oberto & others of Tucson.

Mineralization is ore in irregular, lenticular bodies hosted in Precambrian Pinal Schist; Bolsa Quartzite; and Abrigo Limestone. Ore control: the radioactive zones appear to be elongate parallel to host rock foliation fractures. The ore body is 91.44 meters long and 3.05 meters wide with a NE strike and 40NE dip. Uranium minerals occur in veinlets and breccia fillings in schist and gneissic granite. Radioactivity is present in float, crushed zones, and fracture surfaces. Radioactive zones are weak and discontinuous. The zones have been intensely leached and their uranium content should increase downward for at least a few feet. Veinlets of fluorite, calcite, quartz, uranophane, and autunite.

The rocks on this claim are believed to be of Precambrian and Cambrian ages. Apparently the oldest rock is a gray-green schist, consisting chiefly of quartz and chlorite interlaminated with dark minerals. The foliation dips 25º to 55ºNE. It may belong to the Pinal Schist of Precambrian age. A gneissic granite that may be related to the Oracle Granite, is probably intrusive into the schist, and nearly concordant with its foliation. The granite and schist are successively overlain on the ridges by rocks that probably represent the Bolsa Quartzite and the Abrigo Limestone, both Cambrian in age. Fine-grained, dark-colored dikes cut the Precambrian rocks on this claim and cut the younger rocks in nearby areas. The dikes are hard to trace on the surface, but where exposed, they show both concordant and discordant relations to the foliation of the granite and schist.

Local structures include two prominent fractures which strike N85E and N60W, and dip 80N and 75NE, respectively.

Workings include 4 shallow prospect pits along an arroyo draining southward (A, B, C, D pits) plus the Blue Rock shaft (post-1951).


Mineral List


7 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Olenekian - Ediacaran
247.2 - 635 Ma



ID: 2890886
Paleozoic sedimentary rocks

Age: Neoproterozoic to Triassic (247.2 - 635 Ma)

Description: Undivided Paleozoic limestone, dolostone, quartzite, shale, and related sedimentary rocks. (248-544 Ma)

Lithology: Major:{limestone,dolostone,quartzite}, Minor:{shale}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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