Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Krøderen Lake, Krødsherad, Buskerud, Norway

Oldest recorded age at locality: 1270
Youngest recorded age at locality: 880

mindat Locality ID: 284159
mindat URL: http://www.mindat.org/loc-284159.html

Tectonic Settings:

Total number of sublocalities beneath "Krøderen Lake, Krødsherad, Buskerud, Norway": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Bjertnes Pegmatite

Latitude: 60°10'18"N
Longitude: 9°39'10"E
Decimal Degree (lat, lon): 60.171666666667,9.6527777777778
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al Be C Ca Ce Cu H K Mo Na O P Pb S Si U Y 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneBerylClayFeldsparFluoriteMicaMolybdeniteMonaziteNoneNot in a structural group
QuartzSchoepite

22 IMA Minerals at location:
Albite  (*)Beryl  (*)Chrysocolla  (*)Clarkeite  (*)Fourmarierite  (*)
Joliotite  (*)Kainosite-(Y)  (*)Kamotoite-(Y)  (*)Kasolite  (*)Liebigite  (*)
Metazellerite  (*)Microcline  (*)Molybdenite  (*)Monazite-(Ce)  (*)Muscovite  (*)
Quartz  (*)Rutherfordine  (*)Studtite  (*)Urancalcarite  (*)Uraninite  (*)
Uranophane-α  (*)Zellerite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)9808801912188803
Beryl  (*)BerylBe3Al2Si6O189808801912184286
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O9808801912183531
Clarkeite  (*)NoneNa(UO2)O(OH)·nH2O98088019121818
Fourmarierite  (*)SchoepitePb1-xO3-2x(UO2)4(OH)4+2x·4H2O98088019121861
Joliotite  (*)Not in a structural group(UO2)(CO3)·2H2O9808801912183
Kainosite-(Y)  (*)NoneCa2Y2(SiO3)4(CO3)·H2O98088019121899
Kamotoite-(Y)  (*)NoneY2O4(UO2)4(CO3)3·14H2O9808801912187
Kasolite  (*)NonePb(UO2)(SiO4)·H2O980880191218198
Liebigite  (*)NoneCa2(UO2)(CO3)3·11H2O98088019121878
Metazellerite  (*)NoneCa(UO2)(CO3)2·3H2O9808801912184
Microcline  (*)FeldsparK(AlSi3O8)9808801912184924
Molybdenite  (*)MolybdeniteMoS29808801912185800
Monazite-(Ce)  (*)MonaziteCe(PO4)980880191218945
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)298088019121817380
Quartz  (*)QuartzSiO298088019121861156
Rutherfordine  (*)None(UO2)(CO3)98088019121858
Studtite  (*)None(UO2)(O2)(H2O)2·2H2O98088019121825
Urancalcarite  (*)NoneCa(UO2)3(CO3)(OH)6·3H2O9808801912186
Uraninite  (*)FluoriteUO29808801912182718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O980880191218890
Zellerite  (*)NoneCa(UO2)(CO3)2·5H2O98088019121815


Locality Notes from all Ages at Locality:
Age IDLocality Notes
Giersdorf_00000805The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.
Giersdorf_00000806The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.
Giersdorf_00000807The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.
Giersdorf_00000808The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.


4 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
Giersdorf_00000805980900940±40U-PbThe Pb/Pb and Pb/U ages for the sample taken from the Bjertnes Pegmatite were concordant with themselves and were described in the literature as being similar in age to other volcanic rocks of the area.uraninite   UraniniteUraniniteU9863Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, NorwayBjertnes Pegmatite QuarryBjørlykke & Burger (1962) NGT42_187Pb207-Pb206 age for a uraninite sample
Giersdorf_00000806970890930±40U-PbThe Pb/Pb and Pb/U ages for the sample taken from the Bjertnes Pegmatite were concordant with themselves and were described in the literature as being similar in age to other volcanic rocks of the area.uraninite   UraniniteUraniniteU9863Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, NorwayBjertnes Pegmatite QuarryBjørlykke & Burger (1962) NGT42_187Pb207-U235 age for a uraninite sample
Giersdorf_00000807960880920±40U-PbThe Pb/Pb and Pb/U ages for the sample taken from the Bjertnes Pegmatite were concordant with themselves and were described in the literature as being similar in age to other volcanic rocks of the area.uraninite   UraniniteUraniniteU9863Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, NorwayBjertnes Pegmatite QuarryBjørlykke & Burger (1962) NGT42_187Pb206-U238 age for a uraninite sample
Giersdorf_00000808127010701170±100U-PbThe Thorium age is described in the literature as being the least reliable or the most discordant ages and does not constitute a serious objection to the ~950 Ma age given by the other results.lowuraninite   UraniniteUraniniteU9863Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, NorwayBjertnes Pegmatite QuarryBjørlykke & Burger (1962) NGT42_187Pb208-Th232 age for a uraninite sample, least reliable radometric dating method, see pg 188

SampleSource LocalityReference URL

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