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:
Holt, Tvedestrand, Aust-Agder, Norway

Oldest recorded age at locality: 1105
Youngest recorded age at locality: 1083

mindat Locality ID: 39309
mindat URL: http://www.mindat.org/loc-39309.html

Tectonic Settings:

Total number of sublocalities beneath "Holt, Tvedestrand, Aust-Agder, Norway": 31
Total number of bottom-level sublocalities: 28

Number of Child Localities: 9
Child Localities:
Holtsgruva
Jensen's Feldspar Quarry
Kviteberg
Lindeknuten
Lindland
Maigruveåsen
Rosseland
Solberg Fe Mines
Våland Mine

Latitude: 58°37'26"N
Longitude: 8°51'34"E
Decimal Degree (lat, lon): 58.623888888889,8.8594444444444

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.

Calcite	Clay	Copper	Corundum	Feldspar	Mica	None	Not in a structural group	Quartz	Spinel
Sulphur	Zircon

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: Ag Al C Ca Fe H K Na O S Si Ti Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Clay Copper Corundum Feldspar Mica None Not in a structural group Quartz Spinel
Sulphur Zircon

12 IMA Minerals at location:

Albite ()*	Calcite ()*	Hematite ()*	Ilmenite ()*	Magnetite ()*
Microcline ()*	Muscovite ()*	Quartz ()*	Sillimanite ()*	Silver ()*
Sulphur ()*	Zircon ()*

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)	1105	1083	1	90807	8803
Calcite ()*	Calcite	Ca(CO₃)	1105	1083	1	90807	27770
Hematite ()*	Corundum	Fe₂O₃	1105	1083	1	90807	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	1105	1083	1	90815	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1105	1083	1	90815	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	1105	1083	1	90807	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1105	1083	1	90807	17380
Quartz ()*	Quartz	SiO₂	1105	1083	2	90807,90815	61156
Sillimanite ()*	Not in a structural group	Al₂SiO₅	1105	1083	1	90808	1516
Silver ()*	Copper	Ag	1105	1083	1	90824	5186
Sulphur ()*	Sulphur	S	1105	1083	1	90812	2045
Zircon ()*	Zircon	Zr(SiO₄)	1105	1083	1	90815	5251

1 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	Sample Num	Run Num	Age from other Locality	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 DOI	Reference ID	Age Notes
	Bradley_2012_118	1105	1083	1094±11	U/Pb			euxenite			Yes				12430	Tvedestrand, Aust-Agder, Norway	Tvedestrand	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...