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Seth-La-Kai diatreme (Seth-La-Kai maar), Dilkon, Hopi Buttes Mining District, Navajo Co., Arizona, USAi
Regional Level Types
Seth-La-Kai diatreme (Seth-La-Kai maar)- not defined -
DilkonTown
Hopi Buttes Mining DistrictMining District
Navajo Co.County
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
35° 28' 4'' North , 110° 11' 30'' West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km


During the uranium boom of the mid-1950's, some 192 tons of low-grade ore were produced at the Morale mine in the Hopi Buttes area of Navajo County, Arizona. The host rocks for the ore body were lacustrine sediments of late Miocene to early Pliocene age in the Seth-La-Kai maar. This feature has been referred to in the past as a diatreme (Lowell, 1956; Wenrich and Mascarenas, 1982a,b; Wenrich-Verbeek and others, 1982). It is herein referred to as a maar because the uranium-bearing sedimentary rocks were deposited within a crater (maar), and the volcanic neck (diatreme) is not actually exposed, but is inferred to underlie the maar.

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


4 valid minerals.

Detailed Mineral List:

Celadonite
Formula: K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Description: Occurs in volcanic sandstone & tuffs.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 156, 272; Lowell, J.D. (1956), Occurrence of uranium in Seth-La-Kai diatreme, Hopi Buttes, AZ, Amer. Jour. Sci.: 254: 404-412.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 156, 272; Lowell, J.D. (1956), Occurrence of uranium in Seth-La-Kai diatreme, Hopi Buttes, AZ, Amer. Jour. Sci.: 254: 404-412.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Description: Occurs in volcanic sandstone & tuffs.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 156, 272; Lowell, J.D. (1956), Occurrence of uranium in Seth-La-Kai diatreme, Hopi Buttes, AZ, Amer. Jour. Sci.: 254: 404-412.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 156, 272; Lowell, J.D. (1956), Occurrence of uranium in Seth-La-Kai diatreme, Hopi Buttes, AZ, Amer. Jour. Sci.: 254: 404-412.
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 156, 272; Lowell, J.D. (1956), Occurrence of uranium in Seth-La-Kai diatreme, Hopi Buttes, AZ, Amer. Jour. Sci.: 254: 404-412.

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Celadonite9.EC.15K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Montmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Celadonite71.2.2a.6K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Sheets of 6-membered rings with 2:1 clays
Montmorillonite71.3.1a.2(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Unclassified Minerals, Mixtures, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
H Limonite(Fe,O,OH,H2O)
H LaumontiteCaAl2Si4O12 · 4H2O
H GypsumCaSO4 · 2H2O
H Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
OOxygen
O CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
O Limonite(Fe,O,OH,H2O)
O LaumontiteCaAl2Si4O12 · 4H2O
O GypsumCaSO4 · 2H2O
O Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
NaSodium
Na Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
Mg CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Mg Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Al LaumontiteCaAl2Si4O12 · 4H2O
Al Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
SiSilicon
Si CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Si LaumontiteCaAl2Si4O12 · 4H2O
Si Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
SSulfur
S GypsumCaSO4 · 2H2O
KPotassium
K CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
CaCalcium
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca GypsumCaSO4 · 2H2O
Ca Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
FeIron
Fe CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Fe Limonite(Fe,O,OH,H2O)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 156, 272.
Lowell, J.D. (1956), Occurrence of uranium in Seth-La-Kai diatreme, Hopi Buttes, Arizona, American Journal of Science: 254: 404-412.
Wenrich, Karen J. and Mascarenas, Joseph F. (1982a), Diatremes of the Hopi Buttes, Arizona: Chemical and statistical analyses, USGS Open File Report 82-740.
Chenoweth, W.L. (1990), The Geology and Production History of the Morale Uranium Mine, Hopi Buttes Area, Navajo County, Arizona: Arizona Geological Survey Contributed Report CR-90-D, 14 p.

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