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Crystal No. 8 Mine (Luella Mine), Trout Creek Pass Pegmatite District, Chaffee Co., Colorado, USA

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Latitude & Longitude (WGS84): 38° 50' 1'' North , 106° 1' 32'' West
Latitude & Longitude (decimal): 38.83361,-106.02556
GeoHash:G#: 9wusgm6w1
Locality type:Mine
Köppen climate type:Dfc : Subarctic climate


The Crystal No. 8 (Luella) mine is in sec. 17, T. 14 S., R. 77 W., just 24 miles south of Highway 24-285 [Eckel (1997) p. 12).

Richard M. Pearl ("Colorado Gem Trails") states: "a quarter mile south (and across Trout Creek) of U.S. 24, 5.9 miles East of Johnson Valley."

Deposit:: Commodities (Major) - Feldspar; (Minor) - Bismuth, REE; (Trace) - Fluorine-Fluorite
Development Status: Past Producer
Structure: Arkansas Valley Graben, Southern Mosquito Range, Nnw-Trending Faults
Host Rock: Granitoid
Tectonic Structure: Central Cordillera (Southern Rocky Mountains)

Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,031 mineral species & varietal names listed

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


18 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:

'Albite-Anorthite Series'
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Apatite'
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Arseniosiderite
Formula: Ca2Fe3+3(AsO4)3O2 · 3H2O
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
Arsenolite
Formula: As2O3
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
Arsenopyrite
Formula: FeAsS
Reference: Minerals of Colorado (1997) E.B. Eckel
Bariopharmacosiderite
Formula: Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
'Biotite'
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'commodity:Bismuth'
Formula: Bi
Reference: From USGS MRDS database
Bismuthinite
Formula: Bi2S3
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
Bismutite
Formula: (BiO)2CO3
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Minerals of Colorado (1997) Eckel, E. B.
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Fluorite
Formula: CaF2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Gadolinite'
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Granitoid'
Reference: From USGS MRDS database
Hematite
Formula: Fe2O3
Reference: Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Microcline
Formula: K(AlSi3O8)
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Monazite-(Ce)
Formula: Ce(PO4)
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide
Polycrase-(Y)
Formula: Y(Ti,Nb)2(O,OH)6
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages.
Quartz
Formula: SiO2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz var: Rose Quartz
Formula: SiO2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; USGS Prof. Paper 227; Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71
'commodity:Rare Earths'
Reference: From USGS MRDS database
Scorodite
Formula: Fe3+AsO4 · 2H2O
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages
Xenotime-(Y)
Formula: Y(PO4)
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages
Yukonite
Formula: Ca3Fe3+(AsO4)2(OH)3 · 5H2O
Reference: Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition]. Fulcrum Publishing. 665 pages

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
'Bismuthinite'2.DB.05Bi2S3
Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 4 - Oxides and Hydroxides
'Arsenolite'4.CB.50As2O3
'Euxenite-(Y)'4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
'Hematite'4.CB.05Fe2O3
'Polycrase-(Y)'4.DG.05Y(Ti,Nb)2(O,OH)6
'Quartz'4.DA.05SiO2
var: Rose Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Bismutite'5.BE.25(BiO)2CO3
'Calcite'5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
'Arseniosiderite'8.DH.30Ca2Fe3+3(AsO4)3O2 · 3H2O
'Bariopharmacosiderite'8.DK.10Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O
'Monazite-(Ce)'8.AD.50Ce(PO4)
Scorodite8.CD.10Fe3+AsO4 · 2H2O
Xenotime-(Y)8.AD.35Y(PO4)
Yukonite8.DM.25Ca3Fe3+(AsO4)2(OH)3 · 5H2O
Group 9 - Silicates
'Microcline'9.FA.30K(AlSi3O8)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-
'Biotite'-
'Gadolinite'-
'Garnet Group'-X3Z2(SiO4)3
'Granitoid'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Group 4 - SIMPLE OXIDES
A2X3
Arsenolite4.3.9.1As2O3
Hematite4.3.1.2Fe2O3
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
AB2O6
Euxenite-(Y)8.3.8.2(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Polycrase-(Y)8.3.8.1Y(Ti,Nb)2(O,OH)6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bismutite16a.3.5.1(BiO)2CO3
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)3Zq·xH2O
Arseniosiderite42.8.4.3Ca2Fe3+3(AsO4)3O2 · 3H2O
Bariopharmacosiderite42.8.1a.3Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O
Yukonite42.8.6.1Ca3Fe3+(AsO4)2(OH)3 · 5H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-
'Biotite'-
'Gadolinite'-
'Garnet Group'-X3Z2(SiO4)3
'Granitoid'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
Quartz
var: Rose Quartz
-SiO2
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
H BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Polycrase-(Y)Y(Ti,Nb)2(O,OH)6
H ScoroditeFe3+AsO4 · 2H2O
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
CCarbon
C Bismutite(BiO)2CO3
C CalciteCaCO3
OOxygen
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
O ArsenoliteAs2O3
O BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O
O Bismutite(BiO)2CO3
O CalciteCaCO3
O Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
O Garnet GroupX3Z2(SiO4)3
O HematiteFe2O3
O MicroclineK(AlSi3O8)
O Monazite-(Ce)Ce(PO4)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Polycrase-(Y)Y(Ti,Nb)2(O,OH)6
O QuartzSiO2
O Quartz (var: Rose Quartz)SiO2
O ScoroditeFe3+AsO4 · 2H2O
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O Xenotime-(Y)Y(PO4)
O YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
FFluorine
F FluoriteCaF2
AlAluminium
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
SiSilicon
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si Garnet GroupX3Z2(SiO4)3
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Quartz (var: Rose Quartz)SiO2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
PPhosphorus
P Monazite-(Ce)Ce(PO4)
P Xenotime-(Y)Y(PO4)
SSulfur
S ArsenopyriteFeAsS
S BismuthiniteBi2S3
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
CaCalcium
Ca ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
Ca CalciteCaCO3
Ca Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ca FluoriteCaF2
Ca YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
TiTitanium
Ti Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ti Polycrase-(Y)Y(Ti,Nb)2(O,OH)6
FeIron
Fe ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
Fe ArsenopyriteFeAsS
Fe BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O
Fe HematiteFe2O3
Fe ScoroditeFe3+AsO4 · 2H2O
Fe YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
AsArsenic
As ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
As ArsenoliteAs2O3
As ArsenopyriteFeAsS
As BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O
As ScoroditeFe3+AsO4 · 2H2O
As YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
YYttrium
Y Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Y Polycrase-(Y)Y(Ti,Nb)2(O,OH)6
Y Xenotime-(Y)Y(PO4)
NbNiobium
Nb Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Nb Polycrase-(Y)Y(Ti,Nb)2(O,OH)6
BaBarium
Ba BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O
CeCerium
Ce Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ce Monazite-(Ce)Ce(PO4)
TaTantalum
Ta Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
BiBismuth
Bi BismuthiniteBi2S3
Bi Bismutite(BiO)2CO3
ThThorium
Th Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
UUranium
U Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

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

Paleoproterozoic
1600 - 2500 Ma



ID: 3192520
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Orthogneiss/paragneiss

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]

Paleoproterozoic
1600 - 2500 Ma



ID: 2855918
Granitic rocks of 1700-m.y. age group

Age: Proterozoic (1600 - 2500 Ma)

Stratigraphic Name: Boulder Creek Granite; Cross Creek Granite; Denny Creek Granodiorite; Kroenke Granodiorite; Browns Pass Quartz Monzonite; Powderhorn Granite; Pitts Meadow Granodiorite; Bakers Bridge Granite; Tenmile Granite

Description: Includes Boulder Creek -M.Y. AGE GROUP (AGE 1650-1730 M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites; also, unnamed granitic rocks

Lithology: Major:{granite}, Minor:{granodiorite,quartz monzonite}

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]

Paleoproterozoic
1600 - 2500 Ma



ID: 3300576
Biotite gneiss

Age: Proterozoic (1600 - 2500 Ma)

Description: Mostly gray to dark-gray, fine- to medium-grained, moderately foliated to strongly foliated and layered gneiss and schist. Composed of quartz, plagioclase, microcline, and biotite; locally contains hornblende, sillimanite, and garnet. Accessory minerals are rutile, sphene, apatite, zircon, and magnetite. Sillimanite-bearing biotite schist (metapelite) crops out in and near the Twin Lakes mining district. Migmatitic in most places; contains numerous light-colored layers and lenses (leucosomes) typically 0.1–10 cm thick, although locally may be much thicker. In most places, leucosome bodies form less than half of rock, have sharp contacts with host rock, show much pinch and swell, and in some places are strongly folded. Leucosomes are composed of equigranular, massive to weakly foliated, white to light-gray microcline-plagioclase-quartz rock containing less than 5 percent biotite; accessory minerals are muscovite, opaque minerals, sphene, apatite, garnet, and zircon. Formation of leucosomes may be due to either injection or in situ partial melting (anatexis) (Johannes and Gupta, 1982; Olsen, 1982). In the case of partial melting, biotite gneiss adjacent to leucosomes commonly has biotite-rich selvages representing refractory material remaining after partial melting. Some areas mapped as biotite gneiss may include small bodies of granitic rock. Unit undated in map area, but similar rocks in the Gore Range and western Front Range, northeast of the map area, have a U-Pb zircon age of about 1,750–1,785 Ma (Kellogg and others, 2008, 2011), which represents the age of the source rocks from which detritus that comprises the sedimentary protolith was derived. In the same areas, U-Pb zircon geochronology indicates that formation of migmatite (partial melting) occurred about 1,695 Ma, which is also the approximate time at which many pegmatites in and near these areas formed (Kellogg and others, 2011)

Reference: Kellogg, K.S., R.R. Shroba, C.A. Ruleman, R.G. Bohannon, W.C. McIntosh, W.R. Premo, M.A. Cosca, R.J. Moscati, T.R. Brandt. Geologic map of the upper Arkansas River valley region, north-central Colorado. doi: 10.3133/sim3382. U.S. Geological Survey Scientific Investigations Map 3382. [186]

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)
Heinrich, E. W. (1948): Fluorite-rare eart mineral pegmatites of Chaffee and Fremont counties, Colorado. American Mineralogist. 33, 69-71
Hanson, S.L., Simmons, W.B., Jr., Webber, K.L., and Falster, A.U. (1992): Rare-earth-element mineralogy of granitic pegmatites in the Trout Creek Pass pegmatite district, Chaffee County, Colorado. Canadian Mineralogist: 30: 673-686. (Samples from Crystal No.8 used in this study)
Eckel, E. B.(1997): Minerals of Colorado. [Updated and revised edition by Cobban, Collins, Foord, Kile, Modreski, and Murphy]. Fulcrum Publishing. 665 pages.
Brady, B. T., (1975): Map showing fluorspar deposits in colorado. USGS MAP MR. 70


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