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Monument No. 1 Annex Mine, Monument No. 1 channel, Mystery Valley, Mineral Mining District, Navajo Co., Arizona, USAi
Regional Level Types
Monument No. 1 Annex MineMine
Monument No. 1 channelChannel
Mystery ValleyBasin
Mineral Mining DistrictMining District
Navajo Co.County
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
36° North , 110° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Locality type:


A former U occurrence/mine. Started in the early 1950's.

Mineralization is a weakly mineralized mass of the Shinarump member of the Chinle formation about 150 feet long by 50 feet wide. Mineralization is essentially the same as in the Monument No. 1 mine; however, only specific species attributed to this mine are listed.

Strata in the Monument No. 1 Annex are similar to those filling the Monument No. 1 channel except that light-gray oval clay pebbles, about half an inch long, are in a matrix of coarse-grained sandstone. The clay pebbles are so alined as to give an impression of rudimentary horizontal bedding. Yellow uranium minerals are disseminated in the interstices of the sandstone near the pebbles, but they are absent elsewhere. A banded appearance results: yellow mineralized bands about 1 inch wide alternate with white barren bands, also about 1 inch wide. Close examination near some of the clay pebbles indicates that in some, yellow uranium minerals impregnate the sandstone to the very edges of the pebbles. In others, a halo about a quarter of an inch thick devoid of uranium minerals surrounds them.

Trash pockets of fossil plant matter are common in the rocks of the Monument No. 1 Annex. These pockets appear in cross section as irregular thin strips of black coaly substance (vi train n. In plan view, these pockets show as impressions of reed-like plant material in the sandstone.

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

Mineral List


3 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:

Calcite
Formula: CaCO3
Reference: Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Cos., AZ: 135.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Cos., AZ: 135.
Pyrite
Formula: FeS2
Reference: Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Cos., AZ: 135.
Tyuyamunite
Formula: Ca(UO2)2(VO4)2 · 5-8H2O
Reference: Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Cos., AZ: 135.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Tyuyamunite4.HB.25Ca(UO2)2(VO4)2 · 5-8H2O
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Tyuyamunite40.2a.26.1Ca(UO2)2(VO4)2 · 5-8H2O
Unclassified Minerals, Mixtures, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
H Limonite(Fe,O,OH,H2O)
CCarbon
C CalciteCaCO3
OOxygen
O TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
O CalciteCaCO3
O Limonite(Fe,O,OH,H2O)
SSulfur
S PyriteFeS2
CaCalcium
Ca TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Ca CalciteCaCO3
VVanadium
V TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
FeIron
Fe PyriteFeS2
Fe Limonite(Fe,O,OH,H2O)
UUranium
U TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Counties, Arizona: 129, 134.


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