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Delmoe Lake area, Boulder Batholith, Jefferson County, Montana, USAi
Regional Level Types
Delmoe Lake areaArea
Boulder BatholithBatholith
Jefferson CountyCounty
MontanaState
USACountry

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Latitude & Longitude (WGS84):
46° North , 112° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~53km
GRN:
N31W57
Type:
Area
KΓΆppen climate type:
BSk : Cold semi-arid (steppe) climate
Mindat Locality ID:
211171
Long-form identifier:
mindat:1:2:211171:4
GUID (UUID V4):
7a57adc9-302a-4b53-a522-86c03e931d1b


Delmoe Lake, a reservoir located approximately 10 miles north of Homestake Pass in Jefferson County, Montana, is part of the larger mass of the Boulder Batholith and contains numerous bodies and segregations of aplite, grano-aplite, and alaskaites. These occasionally grade locally into coarse pegmatite or graphic granite, and then into vugs or cavities. The vugs contain anhedral to euhedral crystals of the characteristic granite minerals, i.e., quartz, feldspar, and mica minerals.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

13 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
References:
(In preparation)
β“˜ Albite var. Cleavelandite
Formula: Na(AlSi3O8)
References:
(In preparation)
β“˜ 'Axinite Group'
References:
(In preparation)
β“˜ Cosalite
Formula: Pb2Bi2S5
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
References:
(In preparation)
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
β“˜ Hematite
Formula: Fe2O3
β“˜ 'K Feldspar'
β“˜ Microcline
Formula: K(AlSi3O8)
References:
(In preparation)
β“˜ Molybdenite
Formula: MoS2
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
References:
(In preparation)
β“˜ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
References:
(In preparation)
β“˜ Pyrite
Formula: FeS2
β“˜ Quartz
Formula: SiO2
Habit: Hexagonal
Colour: Black
Description: Morion (Smokey) Quartz, deep black hexagonal crystals
β“˜ Quartz var. Amethyst
Formula: SiO2
β“˜ Quartz var. Sceptre Quartz
Formula: SiO2
References:
(In preparation)
β“˜ Quartz var. Smoky Quartz
Formula: SiO2
References:
(In preparation)
β“˜ Rutile
Formula: TiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
References:
(In preparation)
β“˜ Spessartine
Formula: Mn2+3Al2(SiO4)3
References:
(In preparation)
β“˜ Topaz
Formula: Al2(SiO4)(F,OH)2
Habit: Orthorhombic
Colour: Gold, Yellow, Clear
Description: Light Golden colored, Well formed Topaz Crystal
β“˜ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Molybdenite2.EA.30MoS2
β“˜Pyrite2.EB.05aFeS2
β“˜Cosalite2.JB.10Pb2Bi2S5
Group 4 - Oxides and Hydroxides
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz
var. Sceptre Quartz		4.DA.05SiO2
β“˜4.DA.05SiO2
β“˜var. Amethyst4.DA.05SiO2
β“˜var. Smoky Quartz4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
Group 9 - Silicates
β“˜Spessartine9.AD.25Mn2+3Al2(SiO4)3
β“˜Topaz9.AF.35Al2(SiO4)(F,OH)2
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)
β“˜var. Cleavelandite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
β“˜'K Feldspar'-
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'Axinite Group'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hβ“˜ TopazAl2(SiO4)(F,OH)2
Hβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ Quartz var. AmethystSiO2
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ HematiteFe2O3
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Quartz var. Smoky QuartzSiO2
Oβ“˜ SpessartineMn32+Al2(SiO4)3
Oβ“˜ TopazAl2(SiO4)(F,OH)2
Oβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oβ“˜ Quartz var. Sceptre QuartzSiO2
Oβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Oβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oβ“˜ Garnet GroupX3Z2(SiO4)3
FFluorine
Fβ“˜ TopazAl2(SiO4)(F,OH)2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ SpessartineMn32+Al2(SiO4)3
Alβ“˜ TopazAl2(SiO4)(F,OH)2
Alβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Alβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ Quartz var. AmethystSiO2
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Quartz var. Smoky QuartzSiO2
Siβ“˜ SpessartineMn32+Al2(SiO4)3
Siβ“˜ TopazAl2(SiO4)(F,OH)2
Siβ“˜ Quartz var. Sceptre QuartzSiO2
Siβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Siβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siβ“˜ Garnet GroupX3Z2(SiO4)3
SSulfur
Sβ“˜ CosalitePb2Bi2S5
Sβ“˜ MolybdeniteMoS2
Sβ“˜ PyriteFeS2
KPotassium
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
TiTitanium
Tiβ“˜ RutileTiO2
MnManganese
Mnβ“˜ SpessartineMn32+Al2(SiO4)3
FeIron
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ PyriteFeS2
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MoMolybdenum
Moβ“˜ MolybdeniteMoS2
PbLead
Pbβ“˜ CosalitePb2Bi2S5
BiBismuth
Biβ“˜ CosalitePb2Bi2S5

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

(William C. van Laer, in preparation)
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