Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Krødsherad, Buskerud, Norway

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

mindat Locality ID: 228963
mindat URL: http://www.mindat.org/loc-228963.html

Tectonic Settings:

Total number of sublocalities beneath "Krødsherad, Buskerud, Norway": 3
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Krøderen Lake
Norefjell

Latitude: 60°10'18"N
Longitude: 9°39'10"E
Decimal Degree (lat, lon): 60.171666666667,9.6527777777778

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Allophane	Beryl	Clay	Diaspore	Feldspar	Fluorite	Mica	Molybdenite	Monazite	None
Not in a structural group	Quartz	Schoepite

Albite ()*	Beryl ()*	Chrysocolla ()*	Clarkeite ()*	Fourmarierite ()*
Goethite ()*	Joliotite ()*	Kainosite-(Y) ()*	Kamotoite-(Y) ()*	Kasolite ()*
Liebigite ()*	Metazellerite ()*	Microcline ()*	Molybdenite ()*	Monazite-(Ce) ()*
Muscovite ()*	Quartz ()*	Rutherfordine ()*	Studtite ()*	Urancalcarite ()*
Uraninite ()*	Uranophane-α ()*	Zellerite ()*

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 Fe 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:
Allophane Beryl Clay Diaspore Feldspar Fluorite Mica Molybdenite Monazite None
Not in a structural group Quartz Schoepite

23 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	980	880	1	91218	8803
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	980	880	1	91218	4286
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	980	880	1	91218	3531
Clarkeite ()*	None	Na(UO₂)O(OH)·nH₂O	980	880	1	91218	18
Fourmarierite ()*	Schoepite	Pb_1-xO_3-2x(UO₂)₄(OH)_4+2x·4H₂O	980	880	1	91218	61
Goethite ()*	Diaspore	FeO(OH)			1	91219	7437
Joliotite ()*	Not in a structural group	(UO₂)(CO₃)·2H₂O	980	880	1	91218	3
Kainosite-(Y) ()*	None	Ca₂Y₂(SiO₃)₄(CO₃)·H₂O	980	880	1	91218	99
Kamotoite-(Y) ()*	None	Y₂O₄(UO₂)₄(CO₃)₃·14H₂O	980	880	1	91218	7
Kasolite ()*	None	Pb(UO₂)(SiO₄)·H₂O	980	880	1	91218	198
Liebigite ()*	None	Ca₂(UO₂)(CO₃)₃·11H₂O	980	880	1	91218	78
Metazellerite ()*	None	Ca(UO₂)(CO₃)₂·3H₂O	980	880	1	91218	4
Microcline ()*	Feldspar	K(AlSi₃O₈)	980	880	1	91218	4924
Molybdenite ()*	Molybdenite	MoS₂	980	880	1	91218	5800
Monazite-(Ce) ()*	Monazite	Ce(PO₄)	980	880	1	91218	945
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	980	880	1	91218	17380
Quartz ()*	Quartz	SiO₂	980	880	2	91218,91219	61156
Rutherfordine ()*	None	(UO₂)(CO₃)	980	880	1	91218	58
Studtite ()*	None	(UO₂)(O₂)(H₂O)₂·2H₂O	980	880	1	91218	25
Urancalcarite ()*	None	Ca(UO₂)₃(CO₃)(OH)₆·3H₂O	980	880	1	91218	6
Uraninite ()*	Fluorite	UO₂	980	880	1	91218	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	980	880	1	91218	890
Zellerite ()*	None	Ca(UO₂)(CO₃)₂·5H₂O	980	880	1	91218	15

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Giersdorf_00000805	The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.
Giersdorf_00000806	The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.
Giersdorf_00000807	The Bjertnes Quarry is a pegmatite that was used as a feldspar quarry and is host to some localized uraninite.
Giersdorf_00000808	The 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 ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID	Age Notes
Giersdorf_00000805	980	900	940±40	U-Pb	The 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	Uraninite	Uraninite	U	9863	Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, Norway	Bjertnes Pegmatite Quarry	Bjørlykke & Burger (1962)	NGT42_187	Pb207-Pb206 age for a uraninite sample
Giersdorf_00000806	970	890	930±40	U-Pb	The 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	Uraninite	Uraninite	U	9863	Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, Norway	Bjertnes Pegmatite Quarry	Bjørlykke & Burger (1962)	NGT42_187	Pb207-U235 age for a uraninite sample
Giersdorf_00000807	960	880	920±40	U-Pb	The 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	Uraninite	Uraninite	U	9863	Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, Norway	Bjertnes Pegmatite Quarry	Bjørlykke & Burger (1962)	NGT42_187	Pb206-U238 age for a uraninite sample
Giersdorf_00000808	1270	1070	1170±100	U-Pb	The 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.	low	uraninite	Uraninite	Uraninite	U	9863	Bjertnes Pegmatite, Krøderen Lake, Krødsherad, Buskerud, Norway	Bjertnes Pegmatite Quarry	Bjørlykke & Burger (1962)	NGT42_187	Pb208-Th232 age for a uraninite sample, least reliable radometric dating method, see pg 188

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...