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Big Chief Mine (Big Chief No. 3 & 4 claims), Boot Mesa, Monument Valley Mining District, Navajo Co., Arizona, USAi
Regional Level Types
Big Chief Mine (Big Chief No. 3 & 4 claims)Mine
Boot MesaMesa
Monument Valley Mining DistrictMining District
Navajo Co.County
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
36° 56' 26'' North , 110° 17' 14'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Oljato-Monument Valley154 (2017)10.0km
Oljato-Monument Valley674 (2016)10.5km
Kayenta5,189 (2011)23.8km
Dennehotso746 (2011)40.6km
Halchita266 (2011)40.9km
Other/historical names associated with this locality:
Big Chief #3 & 4 claims


A former U occurrence/mine located in approximate SE¼ sec. 21, T4lN, R19E, G&SRM, about 6.0 km (3.7 miles) NNE of Boot Mesa (coordinates of record). The geographic coordinates presented are approximate for the SE corner of sec. 21.

Mineralization is an U deposit with uraninite in a paleochannel of Shinarump conglomerate.

Workings include underground openings with an incline entry.

Production was 32,534 tons of ore @ 0.23% U3O8 (1959-1961).

Analysis test results: 0.31% U3O8; 0.50% V2O5; 6.00% CaCO3 maximum.

Regions containing this locality

North America PlateTectonic Plate
Colorado Plateau, USAPlateau
Navajo Nation Indian Reservation, USAReservation
Hopi-Navajo Indian Reservations, Colorado Plateau, Apache; Navajo and San Juan Cos., Arizona & Utah, USA

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Uraninite
Formula: UO2
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: 218.
Uranopilite
Formula: (UO2)6(SO4)O2(OH)6 · 14H2O
Reference: Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 9.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Uraninite4.DL.05UO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Uranopilite7.EA.05(UO2)6(SO4)O2(OH)6 · 14H2O

List of minerals arranged by Dana 8th Edition classification

Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)6(XO4)Zq·xH2O
Uranopilite31.2.6.1(UO2)6(SO4)O2(OH)6 · 14H2O

List of minerals for each chemical element

HHydrogen
H Uranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
OOxygen
O Uranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
O UraniniteUO2
SSulfur
S Uranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
UUranium
U Uranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
U UraniniteUO2

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

Holocene - Gelasian
0 - 2.588 Ma



ID: 2779547
Quaternary surficial deposits, undivided

Age: Pleistocene (0 - 2.588 Ma)

Description: Unconsolidated to strongly consolidated alluvial and eolian deposits. This unit includes: coarse, poorly sorted alluvial fan and terrace deposits on middle and upper piedmonts and along large drainages; sand, silt and clay on alluvial plains and playas; and wind-blown sand deposits. (0-2 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.

Lithology: Major:{sand,silt,clay}

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]

Early Jurassic - Late Triassic
174.1 - 237 Ma



ID: 3185972
Mesozoic sedimentary rocks

Age: Mesozoic (174.1 - 237 Ma)

Lithology: Sandstone-conglomerate

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]

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
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: 218.
Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 9.
U.S. Department of Energy files.
USGS Boot Mesa, Arizona, quadrangle 15 minute topo map.
Marble Canyon NTMS.


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