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Big Bertha Mine (Big Bertha pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USAi
Regional Level Types
Big Bertha Mine (Big Bertha pegmatite)Mine
South Platte Pegmatite DistrictMining District
Jefferson Co.County
ColoradoState
USACountry

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Latitude & Longitude (WGS84): 39° 20' 13'' North , 105° 13' 3'' West
Latitude & Longitude (decimal): 39.33694,-105.21750
GeoHash:G#: 9wvpv9nfq
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate


Ref.: Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Series 11; Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).

A pegmatite mine located in the SW¼ Sec 22, T.8S., R.70W.

Mineralization is an unzoned, lobate pegmatite body in granite.

Workings include a large open cut.

Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,070 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Fluorite
Formula: CaF2
Reference: Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11; Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).
Fluorite var: Yttrocerite
Formula: (Ca,Y,Ce)F2+x
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).
'Gadolinite'
Reference: Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
'Monazite'
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).
Synchysite-(Y)
Formula: CaY(CO3)2F
Reference: Minerals of Colorado (1997) E.B. Eckel
Thorite
Formula: Th(SiO4)
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).
'Thorogummite'
Formula: (Th,U)(SiO4)1-x(OH)4x
Reference: Minerals of Colorado (1997) E.B. Eckel
Xenotime-(Y)
Formula: Y(PO4)
Reference: Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Zircon
Formula: Zr(SiO4)
Reference: Minerals of Colorado (1997) E.B. Eckel
Zircon var: Cyrtolite
Formula: Zr[(SiO4),(OH)4]
Reference: Minerals of Colorado (1997) E.B. Eckel

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
var: Yttrocerite3.AB.25(Ca,Y,Ce)F2+x
Group 5 - Nitrates and Carbonates
Synchysite-(Y)5.BD.20cCaY(CO3)2F
Group 8 - Phosphates, Arsenates and Vanadates
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Thorite9.AD.30Th(SiO4)
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Gadolinite-
Monazite-
Thorogummite-(Th,U)(SiO4)1-x(OH)4x

List of minerals arranged by Dana 8th Edition classification

Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Synchysite-(Y)16a.1.3.2CaY(CO3)2F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
'Thorogummite'51.5.2.5(Th,U)(SiO4)1-x(OH)4x
Zircon51.5.2.1Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Fluorite
var: Yttrocerite
-(Ca,Y,Ce)F2+x
'Gadolinite'-
'Monazite'-
Xenotime-(Y)-Y(PO4)
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H Thorogummite(Th,U)(SiO4)1-x(OH)4x
CCarbon
C Synchysite-(Y)CaY(CO3)2F
OOxygen
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O Synchysite-(Y)CaY(CO3)2F
O ThoriteTh(SiO4)
O Thorogummite(Th,U)(SiO4)1-x(OH)4x
O Xenotime-(Y)Y(PO4)
O ZirconZr(SiO4)
FFluorine
F FluoriteCaF2
F Synchysite-(Y)CaY(CO3)2F
F Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
SiSilicon
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si ThoriteTh(SiO4)
Si Thorogummite(Th,U)(SiO4)1-x(OH)4x
Si ZirconZr(SiO4)
PPhosphorus
P Xenotime-(Y)Y(PO4)
CaCalcium
Ca FluoriteCaF2
Ca Synchysite-(Y)CaY(CO3)2F
Ca Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
YYttrium
Y Synchysite-(Y)CaY(CO3)2F
Y Xenotime-(Y)Y(PO4)
Y Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
ZrZirconium
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Zr ZirconZr(SiO4)
CeCerium
Ce Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
ThThorium
Th ThoriteTh(SiO4)
Th Thorogummite(Th,U)(SiO4)1-x(OH)4x
UUranium
U Thorogummite(Th,U)(SiO4)1-x(OH)4x

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

Mesoproterozoic
1000 - 1600 Ma



ID: 2975257
Rocks of Pikes Peak Batholith (1000-m.y. age group)

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Pikes Peak Granite; Mount Rosa Granite; Windy Point Granite; Redskin Granite

Description: Includes Pikes Peak, Mount Rosa, Windy Point, and Redskin Granites and unnamed 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:{granite,alkali feldspar 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


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