Sally Mine, Boot Mesa, Monument Valley Mining District, Navajo Co., Arizona, USAi
|Regional Level Types|
|Monument Valley Mining District||Mining District|
An U occurrence located in secs. 6&7, T40N, R20E, G&SRM, about 7.4 km (4.6 miles) E of Boot Mesa (coordinates of record), in Monument Valley. The geographic coordinates presented are for the approximate center of the boundary between secs. 6 & 7. This locality is not listed in the USGS MRDS database.
Mineralization is a channel U deposit in sandstone of the Shinarump Member, Chinle Formation on the west limb of the Agathla Anticline, superimposed on
the Monument upwarp. Low-grade mineralization occurs at the base of the paleochannel. The deposit is completely oxidized autunite, low vanadium, low lime. The channel trends NNW to WNW & is tilted 50 toward the NW.
Workings include surface drilling operations with 60 drill holes totaling 3,000 feet.
Regions containing this locality
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
1 valid mineral.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Detailed Mineral List:
| ⓘ Autunite|
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Scarborough, Robert B. (1981), Radioactive occurrences and uranium production in Arizona, Arizona Bureau of Geology and Mineral Technology Report for U.S. Department of Energy (Atomic Energy Commission), GJBX-143. RME-2071: 224.
List of minerals arranged by Strunz 10th Edition classification
|Group 8 - Phosphates, Arsenates and Vanadates|
|ⓘ||Autunite||8.EB.05||Ca(UO2)2(PO4)2 · 11H2O|
List of minerals arranged by Dana 8th Edition classification
|Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES|
|AB2(XO4)2·xH2O, containing (UO2)2+|
|ⓘ||Autunite||40.2a.1.1||Ca(UO2)2(PO4)2 · 11H2O|
List of minerals for each chemical element
|H||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|O||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|P||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|Ca||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|U||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
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
251.902 - 298.9 Ma
|Paleozoic sedimentary rocks|
Age: Phanerozoic (251.902 - 298.9 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. 
|Kungurian - Moscovian|
272.95 - 315.2 Ma
|Permian to Pennsylvanian sedimentary rocks|
Age: Paleozoic (272.95 - 315.2 Ma)
Stratigraphic Name: Hermit Formation; Supai Group; Schnebly Hill Formation; Naco Group
Description: Interbedded sandstone, shale, and limestone usually characterized by ledgy outcrops. Orange to reddish sandstone forms cliffs near Sedona. This unit includes Supai Group and Hermit Shale in northern Arizona and Naco Group in southern Arizona. It was deposited in coastal-plain to shallow-marine settings during time of variable and changing sea level. Rocks of this map unit in southern Arizona may be in part equivalent to Permian rocks of map unit P in central and northern Arizona. (280-310 Ma)
Comments: Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.
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.