Leroy No. 1 Mine (MP-552 Mine; Leroy Pettigrew; Pettigrew), Northeast Carrizo Mountains Mining District, Carrizo Range, Apache Co., Arizona, USAi
|Regional Level Types|
|Leroy No. 1 Mine (MP-552 Mine; Leroy Pettigrew; Pettigrew)||Mine|
|Northeast Carrizo Mountains Mining District||Mining District|
|Carrizo Range||Mountain Range|
A former U-V occurrence/mine located in approximate secs. 29-30, T39N, R31E, G&SRM, 20.9 km (13.0 miles) S of Chinle and 1.4 miles SW of Cottonwood Canyon. T&R values are not presented for this location.
Mineralization is tyuyamunite in irregular tabular layers in Late Jurassic claystone, siltstone and sandstone of the Salt Wash member of the Morrison formation. Ore is found in clusters, usually associated with carbonaceous detritus. Local rocks include rocks of the Chinle Formation.
Workings include a 32° incline at 82 feet long with a 60 foot drift at the bottom.
Production was 25 tons of ore @ 0.19% U3O8; 2.46% V2O5 (1956 & 1961).
Regions containing this locality
|North America Plate||Tectonic Plate|
|Colorado Plateau, USA||Plateau|
|Navajo Nation Indian Reservation, USA||Reservation|
|Hopi-Navajo Indian Reservations, Colorado Plateau, Apache; Navajo and San Juan Cos., Arizona & Utah, USA|
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:
| ⓘ Tyuyamunite|
Formula: Ca(UO2)2(VO4)2 · 5-8H2O
Reference: Stokes, W.L. (1951), Carnotite deposits in the Carrizo Mountains area, USGS Circ. III; Chenoweth, W.L. (1955), Geology and uranium deposits of NW Carrizo area, Four Corners Field Cove, No. 1; Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 145; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 235-248.
List of minerals arranged by Strunz 10th Edition classification
|Group 4 - Oxides and Hydroxides|
|ⓘ||Tyuyamunite||4.HB.25||Ca(UO2)2(VO4)2 · 5-8H2O|
List of minerals arranged by Dana 8th Edition classification
|Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES|
|AB2(XO4)2·xH2O, containing (UO2)2+|
|ⓘ||Tyuyamunite||40.2a.26.1||Ca(UO2)2(VO4)2 · 5-8H2O|
List of minerals for each chemical element
|H||ⓘ Tyuyamunite||Ca(UO2)2(VO4)2 · 5-8H2O|
|O||ⓘ Tyuyamunite||Ca(UO2)2(VO4)2 · 5-8H2O|
|Ca||ⓘ Tyuyamunite||Ca(UO2)2(VO4)2 · 5-8H2O|
|V||ⓘ Tyuyamunite||Ca(UO2)2(VO4)2 · 5-8H2O|
|U||ⓘ Tyuyamunite||Ca(UO2)2(VO4)2 · 5-8H2O|
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
|Early Jurassic - Late Triassic|
174.1 - 237 Ma
|Mesozoic sedimentary rocks|
Age: Mesozoic (174.1 - 237 Ma)
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. 
|Norian - Carnian|
208.5 - 237 Ma
Age: Late Triassic (208.5 - 237 Ma)
Stratigraphic Name: Chinle Formation
Description: Colorful mudstone, such as in the Painted Desert, and less abundant lenses of sandstone and conglomerate, deposited by a large river system. This unit typically is eroded into badlands topography and contains clays that are prone to shrinking and swelling. (210-230 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.