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Henderson Mine, Dailey District (Jones Pass District), Clear Creek Co., Colorado, USAi
Regional Level Types
Henderson MineMine (Active)
Dailey District (Jones Pass District)Mining District
Clear Creek Co.County
ColoradoState
USACountry

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Key
Lock Map
Entrance to Henderson Mine near Berthoud Pass, Colorado

Henderson Mine, Dailey District, Clear Creek Co., Colorado, USA
Surface facilities of Henderson Mine and remining portion of Red Mountain

Henderson Mine, Dailey District, Clear Creek Co., Colorado, USA
Latitude & Longitude (WGS84): 39° 46' 8'' North , 105° 50' 57'' West
Latitude & Longitude (decimal): 39.76889,-105.84917
GeoHash:G#: 9xhdprdyx
Owned/operated by:Freeport-McMoRan (100%)
Locality type:Mine (Active) - last checked 2018
Köppen climate type:Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Silver Plume174 (2017)13.3km
Empire287 (2017)14.1km
Georgetown1,049 (2017)14.7km
Winter Park993 (2017)15.5km
Saint Marys283 (2011)18.0km


The Henderson ore deposit is located 3000 feet beneath the summit Red Mountain, about 10 miles west of Empire in the Dailey (Jones Pass) district. Access is from U.S. Highway 40 at Berthoud Falls.

The Henderson mine, which has produced molybdenum since 1976 (the deposit was discovered in 1964), is owned by Freeport-McMoRan. It is North America’s largest producer of primary molybdenum source. 2007 production was 40 million pounds of molybdenum.

The Henderson orebody is a blind deposit of about 300 mt (>0.2%) located deeper in the intrusive complex beneath the Urad orebody. Urad produced molybdenum during World War 1 and then again from 1967 to 1974 when the orebody was exhausted.

Both the Urad and Henderson deposits are associated with the Red Mountain Intrusive Center. This is an intrusive complex with more than 20 identifiable pulses of magma. The Henderson orebody was produced from 3 intrusive centers, all of which are hosted within the Urad porphyry. The Henderson - Urad ore deposit is a classic "Climax type" porphyry Mo deposit and many of the genetic characteristics recognized at the Climax mine were applied here from the initial exploration phase onward. The geology is well summarized by Shannon, et al. (2004)

Mining has occurred on 3 levels: 8100, 7700 and 7210. As of 2011 production is solely from the 7210 level.

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

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


39 valid minerals.

Detailed Mineral List:

Aeschynite-(Ce)
Formula: (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Aeschynite-(Y)
Formula: (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Andradite
Formula: Ca3Fe3+2(SiO4)3
Baryte
Formula: BaSO4
'Biotite'
Brannerite
Formula: (U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Calcite
Formula: CaCO3
Cassiterite
Formula: SnO2
Chalcopyrite
Formula: CuFeS2
Chrysoberyl
Formula: BeAl2O4
Columbite-(Fe)
Formula: Fe2+Nb2O6
'Columbite-(Fe)-Columbite-(Mn) Series'
Columbite-(Mn)
Formula: Mn2+Nb2O6
Creedite
Formula: Ca3SO4Al2F8(OH)2 · 2H2O
Ferrimolybdite
Formula: Fe2(MoO4)3 · nH2O
Fluocerite-(Ce)
Formula: (Ce,La)F3
Fluorannite
Formula: KFe2+3(AlSi3O10)(F,OH)2
Fluorapatite
Formula: Ca5(PO4)3F
Fluorite
Formula: CaF2
Fluorophlogopite
Formula: KMg3(AlSi3O10)(F,OH)2
Galena
Formula: PbS
'Garnet Group'
Formula: X3Z2(SiO4)3
Gypsum
Formula: CaSO4 · 2H2O
Hematite
Formula: Fe2O3
Hübnerite
Formula: MnWO4
Ixiolite
Formula: (Ta,Nb,Sn,Fe,Mn)4O8
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
'K Feldspar'
Magnetite
Formula: Fe2+Fe3+2O4
Molybdenite
Formula: MoS2
'Monazite'
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe7S8
Quartz
Formula: SiO2
Rhodochrosite
Formula: MnCO3
Rutile
Formula: TiO2
Rutile var: Ilmenorutile
Formula: Fex(Nb,Ta)2x · 4Ti1-xO2
Spessartine
Formula: Mn2+3Al2(SiO4)3
Sphalerite
Formula: ZnS
Thorite
Formula: Th(SiO4)
Topaz
Formula: Al2(SiO4)(F,OH)2
Uraninite
Formula: UO2
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Xenotime-(Y)
Formula: Y(PO4)
Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
Creedite3.CG.15Ca3SO4Al2F8(OH)2 · 2H2O
Fluocerite-(Ce)3.AC.15(Ce,La)F3
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Aeschynite-(Ce)4.DF.05(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Aeschynite-(Y)4.DF.05(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Brannerite4.DH.05(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Cassiterite4.DB.05SnO2
Chrysoberyl4.BA.05BeAl2O4
Columbite-(Fe)4.DB.35Fe2+Nb2O6
Columbite-(Mn)4.DB.35Mn2+Nb2O6
Hematite4.CB.05Fe2O3
Hübnerite4.DB.30MnWO4
Ixiolite4.DB.25(Ta,Nb,Sn,Fe,Mn)4O8
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
var: Ilmenorutile4.DB.05Fex(Nb,Ta)2x · 4Ti1-xO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Rhodochrosite5.AB.05MnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Ferrimolybdite7.GB.30Fe2(MoO4)3 · nH2O
Gypsum7.CD.40CaSO4 · 2H2O
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Andradite9.AD.25Ca3Fe3+2(SiO4)3
Fluorannite9.EC.20KFe2+3(AlSi3O10)(F,OH)2
Fluorophlogopite9.EC.20KMg3(AlSi3O10)(F,OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Thorite9.AD.30Th(SiO4)
Topaz9.AF.35Al2(SiO4)(F,OH)2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'Monazite'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Cassiterite4.4.1.5SnO2
Rutile4.4.1.1TiO2
var: Ilmenorutile4.4.1.2Fex(Nb,Ta)2x · 4Ti1-xO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chrysoberyl7.2.9.1BeAl2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Ixiolite8.1.10.1(Ta,Nb,Sn,Fe,Mn)4O8
AB2O6
Aeschynite-(Ce)8.3.6.1(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Aeschynite-(Y)8.3.6.3(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Brannerite8.3.4.1(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Columbite-(Fe)8.3.2.2Fe2+Nb2O6
Columbite-(Mn)8.3.2.4Mn2+Nb2O6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
AX3
Fluocerite-(Ce)9.3.4.1(Ce,La)F3
Group 12 - COMPOUND HALIDES
Miscellaneous
Creedite12.1.4.1Ca3SO4Al2F8(OH)2 · 2H2O
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Hübnerite48.1.1.1MnWO4
Group 49 - HYDRATED MOLYBDATES AND TUNGSTATES
Hydrated Normal Molybdates and Tungstates
Ferrimolybdite49.2.1.1Fe2(MoO4)3 · nH2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
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
Unclassified Minerals, Mixtures, etc.
'Biotite'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
Fluorannite-KFe2+3(AlSi3O10)(F,OH)2
Fluorophlogopite-KMg3(AlSi3O10)(F,OH)2
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'Monazite'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H TopazAl2(SiO4)(F,OH)2
H Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
H Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
H JarositeKFe3+ 3(SO4)2(OH)6
H FerrimolybditeFe2(MoO4)3 · nH2O
H Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
H MuscoviteKAl2(AlSi3O10)(OH)2
H CreediteCa3SO4Al2F8(OH)2 · 2H2O
H GypsumCaSO4 · 2H2O
BeBeryllium
Be ChrysoberylBeAl2O4
CCarbon
C RhodochrositeMnCO3
C CalciteCaCO3
OOxygen
O RhodochrositeMnCO3
O CalciteCaCO3
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O MagnetiteFe2+Fe23+O4
O HübneriteMnWO4
O TopazAl2(SiO4)(F,OH)2
O HematiteFe2O3
O QuartzSiO2
O Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
O Rutile (var: Ilmenorutile)Fex(Nb,Ta)2x · 4Ti1-xO2
O AndraditeCa3Fe23+(SiO4)3
O BaryteBaSO4
O Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
O CassiteriteSnO2
O ChrysoberylBeAl2O4
O FluorapatiteCa5(PO4)3F
O Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
O JarositeKFe3+ 3(SO4)2(OH)6
O Columbite-(Mn)Mn2+Nb2O6
O RutileTiO2
O SpessartineMn32+Al2(SiO4)3
O UraniniteUO2
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
O Xenotime-(Y)Y(PO4)
O ZirconZr(SiO4)
O FerrimolybditeFe2(MoO4)3 · nH2O
O Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
O Columbite-(Fe)Fe2+Nb2O6
O FluoranniteKFe32+(AlSi3O10)(F,OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O ThoriteTh(SiO4)
O CreediteCa3SO4Al2F8(OH)2 · 2H2O
O FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
O GypsumCaSO4 · 2H2O
O Garnet GroupX3Z2(SiO4)3
FFluorine
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
F FluorapatiteCa5(PO4)3F
F Fluocerite-(Ce)(Ce,La)F3
F FluoranniteKFe32+(AlSi3O10)(F,OH)2
F CreediteCa3SO4Al2F8(OH)2 · 2H2O
F FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
MgMagnesium
Mg FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
AlAluminium
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al TopazAl2(SiO4)(F,OH)2
Al ChrysoberylBeAl2O4
Al SpessartineMn32+Al2(SiO4)3
Al FluoranniteKFe32+(AlSi3O10)(F,OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al CreediteCa3SO4Al2F8(OH)2 · 2H2O
Al FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
SiSilicon
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si TopazAl2(SiO4)(F,OH)2
Si QuartzSiO2
Si AndraditeCa3Fe23+(SiO4)3
Si SpessartineMn32+Al2(SiO4)3
Si ZirconZr(SiO4)
Si FluoranniteKFe32+(AlSi3O10)(F,OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si ThoriteTh(SiO4)
Si FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
Si Garnet GroupX3Z2(SiO4)3
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Xenotime-(Y)Y(PO4)
SSulfur
S MolybdeniteMoS2
S PyriteFeS2
S GalenaPbS
S SphaleriteZnS
S BaryteBaSO4
S JarositeKFe3+ 3(SO4)2(OH)6
S CreediteCa3SO4Al2F8(OH)2 · 2H2O
S GypsumCaSO4 · 2H2O
S PyrrhotiteFe7S8
S ChalcopyriteCuFeS2
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K JarositeKFe3+ 3(SO4)2(OH)6
K FluoranniteKFe32+(AlSi3O10)(F,OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
CaCalcium
Ca FluoriteCaF2
Ca CalciteCaCO3
Ca Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Ca AndraditeCa3Fe23+(SiO4)3
Ca Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Ca FluorapatiteCa5(PO4)3F
Ca Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Ca CreediteCa3SO4Al2F8(OH)2 · 2H2O
Ca GypsumCaSO4 · 2H2O
TiTitanium
Ti Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Ti Rutile (var: Ilmenorutile)Fex(Nb,Ta)2x · 4Ti1-xO2
Ti Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Ti RutileTiO2
Ti Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
MnManganese
Mn RhodochrositeMnCO3
Mn HübneriteMnWO4
Mn Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
Mn Columbite-(Mn)Mn2+Nb2O6
Mn SpessartineMn32+Al2(SiO4)3
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
Fe HematiteFe2O3
Fe Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Fe Rutile (var: Ilmenorutile)Fex(Nb,Ta)2x · 4Ti1-xO2
Fe AndraditeCa3Fe23+(SiO4)3
Fe Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
Fe FerrimolybditeFe2(MoO4)3 · nH2O
Fe Columbite-(Fe)Fe2+Nb2O6
Fe FluoranniteKFe32+(AlSi3O10)(F,OH)2
Fe PyrrhotiteFe7S8
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
YYttrium
Y Xenotime-(Y)Y(PO4)
Y Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
ZrZirconium
Zr ZirconZr(SiO4)
NbNiobium
Nb Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Nb Rutile (var: Ilmenorutile)Fex(Nb,Ta)2x · 4Ti1-xO2
Nb Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Nb Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
Nb Columbite-(Mn)Mn2+Nb2O6
Nb Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Nb Columbite-(Fe)Fe2+Nb2O6
MoMolybdenum
Mo MolybdeniteMoS2
Mo FerrimolybditeFe2(MoO4)3 · nH2O
SnTin
Sn CassiteriteSnO2
BaBarium
Ba BaryteBaSO4
CeCerium
Ce Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Ce Fluocerite-(Ce)(Ce,La)F3
TaTantalum
Ta Rutile (var: Ilmenorutile)Fex(Nb,Ta)2x · 4Ti1-xO2
Ta Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
WTungsten
W HübneriteMnWO4
W Wolframite(Fe2+)WO4 to (Mn2+)WO4
PbLead
Pb GalenaPbS
ThThorium
Th Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Th Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Th Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Th ThoriteTh(SiO4)
UUranium
U Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
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

Late Pleistocene
0.0117 - 0.126 Ma



ID: 2207319
Till of Pinedale age

Age: Pleistocene (0.0117 - 0.126 Ma)

Description: Mostly nonsorted and nonstratified, subangular to subrounded boulders to granules in a silty sand matrix. Material less than 2 mm in diameter is estimated to be 20–40 percent of unit. This material consists chiefly of poorly sorted sand and ≤20 percent silt and ≤5 percent clay. Unit commonly forms large prominent, sharp-crested lateral and end moraines that are very bouldery and have distinct constructional morphology. Deposits in some areas have well-expressed knob-and-kettle topography. Surface soils have A/Cox profiles on moraines with narrow crests and A/Bw/Cox and A/Btj/Cox profiles on moraines with broad crests. Surface and near-surface O and E soil horizons are locally present. Cambic (Bw) and weak argillic (Btj) horizons are thin (10–40 cm) and commonly contain 1–5 percent more clay than the underlying till (<2 mm size fraction). Most of the biotite-rich granitic and gneissic clasts within the soil are unweathered, and disintegrated clasts are rare. Unit locally includes deposits of stratified drift, mass-movement and glacial deposits, undivided (Qmg), tills of the Satanta Peak and Triple Lakes advances of Benedict (1985), about 12–10 ka (Davis, 1988), till of Bull Lake age (Qtb), colluvium (Qc) and other mass-movement deposits, and valley-floor alluvium (Qva); locally may include till of pre-Bull Lake age. Radiocarbon (14C) and cosmogenic-exposure ages indicate that till of unit Qtp is about 30–12 ka (Nelson and others, 1979; Madole, 1986; Schildgen and Dethier, 2000; Benson and others, 2004, 2005). Subsurface deposits and locally some surface deposits of unit Qtp may be older than 30 ka, because uranium-series ages of travertine in the northern Yellowstone area suggest an early advance of Pinedale ice about 47–34 ka (Sturchio and others, 1994). Estimated thickness 1.5–30 m

Reference: Kellogg, K.S., Shroba, R.R., Bryant, Bruce, and Premo, W.R. Geologic Map of the Denver West 30' x 60' Quadrangle, North- Central Colorado. USGS Geologic Investigations Series 3000. [35]

Mesoproterozoic
1000 - 1600 Ma



ID: 3008003
Granitic rocks of 1400-m.y. age group

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Silver Plume Granite; Sherman Granite; Cripple Creek Granite; St. Kevin Granite; Vernal Mesa Granite; Curecanti Granite; Eolus Granite; Trimble Granite

Description: Includes Silver Plume, Sherman, Cripple Creek, St. Kevin, Vernal Mesa, Curecanti, Eolus, and Trimble Granites or Quartz Monzonites; also, San Isabel Granite of Boyer (1962) and unnamed granitic rocks

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{alkali feldspar granite,granite}, Minor:{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: 3186950
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]

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)
Gunow, Alexander J., Ludington, Steve, and Munoz, J. L., 1980, Fluorine in Micas from the Henderson Molybdenite Deposit, Colorado, Economic Geology, 75:1127-1137.
Desborough, George A.; Mihalik, Peter (1980) Accessory minerals in the igneous host of molybdenum ore, Henderson Mine, Colorado. USGS Open-File Report 80-661.
Econ Geol (1988) 83: 266-296.
Eckel, Edwin B. (1997): Minerals of Colorado, updated & revised: 13.
Junxing Zhao, Kezhang Qin, Guangming Li, and Jinxiang Li (2011): Characteristics of alteration and mineralization in the Sharang porphyry molybdenum deposit in the northern margin of Gangdese and comparison with typical porphyry molybdenum deposits in the world. Geology and Exploration 47(1), 54-70.
Shannon, J.R., Nelson, E.P., and Golden, R.J. Jr., 2004, Surface and underground geology of the world-class Henderson molybdenum porphyry mine, Colorado, in Nelson, E.P. and Erslev, E.A., eds., Field trips in the southern Rocky Mountains, USA: Geological Society of America Field Guide 5, p. 207–218.

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