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Bråstad Fe Mines, Øyestad, Arendal Iron Mines, Arendal, Aust-Agder, Norwayi
Regional Level Types
Bråstad Fe MinesGroup of Mines
ØyestadMunicipality (Historical)
Arendal Iron MinesGroup of Mines
ArendalMunicipality
Aust-AgderCounty
NorwayCountry

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Latitude & Longitude (WGS84):
58° 27' 48'' North , 8° 42' 5'' East
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Arendal30,916 (2017)4.1km
Rykene647 (2013)7.0km
Fevik4,989 (2014)9.6km
Grimstad9,561 (2017)15.1km
Tvedestrand1,975 (2016)22.1km
Other/historical names associated with this locality:
Braastad gruver
Other Languages:
Norwegian:
Bråstad gruver, Øyestad, Arendal jerngruver, Arendal, Aust-Agder, Norge


Proterozoic skarn iron ore belonging to the Bråstad-Omholt Mining Field W of Arendal. The Bråstad Fe mines were among the largest and most important of the Fe-mines in Arendal municipality. It was closed down in 1975. Most of the mining dumps have now been completely removed to be used for road construction. Many of the mines are now filled with much garbage.
The mining area covers 600 x 600m and more than 40 mines and prospects are registered.
The mines, shafts, and prospects belonging to the Bråstad Mines are concentrated in 2 main areas:
- The oldest ones located between Slottetjenn and Bergtjenn, among these are Katte, Østre Zugge, Vestre Zugge, Tre Brødre, Hvalfisk and Lille Langgruve Mines.
- The other area is located more to the SW. Among these are the Hesterumpe, Gamle Langgruve, Gyldenløwe, Antoinette, Erlands gruve, Skoggruva, Ovnsgruva, Treschow, Charlotte Mines, and a large number of smaller prospects.

The mining periods:

The history of Bråstad mines

Period Worked by Producing mines
1650-1882 Fritzøe ironwork
1906-1907 A/S Malmexport Gyldenløwe and Antoinette Mines
1916-1921 A/S Braastad Jerngruber Gyldenløwe and Antoinette Mines
1941 ?
1952-1975 Christiania Spigerverk

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
Fennoscandian ShieldShield
ScandinaviaRegion

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

8 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Uwe Kolitsch collection
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Uwe Kolitsch collection
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: Weibye, P. C. (1848): Beiträge zur topograpischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde. 22: 465-544
Calcite
Formula: CaCO3
Reference: Uwe Kolitsch collection
Clinohumite
Formula: Mg9(SiO4)4F2
Reference: Neumann, H. (1985): Norges Mineraler. Norges geologiske Undersøkelse Skrifter 68, p. 147
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Kolitsch, U., Husdal, T. A., Brandstätter, F. & Ertl, A. (2011) : New crystal-chemical data for members of the tourmaline group from Norway: occurences of fluor-schorl and luinaite-(OH). Norsk Bergverksmuseum Skrift 46, 17-24.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Alan Goldstein specimen and photo.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Uwe Kolitsch collection
Quartz
Formula: SiO2
Reference: Naturhistoriska Riksmuseet, Stockholm # 19252891
Sphalerite
Formula: ZnS
Reference: Weibye, P. C. (1848): Beiträge zur topograpischen Mineralologie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde. 22: 465-544
Titanite
Formula: CaTi(SiO4)O
Reference: Holm,C. (1824): Samlinger til Norges topographiske Mineralogie 1: Fortegnelse over de i Omegnen af Arendal forekommende Fossilier. Nyt Magazin for Naturvidenskaberne, 2: 111-115

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Clinohumite9.AF.55Mg9(SiO4)4F2
Dravite9.CK.05Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
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
Clinohumite52.3.2d.1Mg9(SiO4)4F2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Dravite61.3.1.9Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H ApatiteCa5(PO4)3(Cl/F/OH)
BBoron
B DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C CalciteCaCO3
OOxygen
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O QuartzSiO2
O TitaniteCaTi(SiO4)O
O ClinohumiteMg9(SiO4)4F2
O DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
O CalciteCaCO3
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Garnet GroupX3Z2(SiO4)3
O ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
F ClinohumiteMg9(SiO4)4F2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg ClinohumiteMg9(SiO4)4F2
Mg DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si QuartzSiO2
Si TitaniteCaTi(SiO4)O
Si ClinohumiteMg9(SiO4)4F2
Si DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Garnet GroupX3Z2(SiO4)3
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S SphaleriteZnS
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca TitaniteCaTi(SiO4)O
Ca CalciteCaCO3
Ca ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Ti TitaniteCaTi(SiO4)O
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
ZnZinc
Zn SphaleriteZnS

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

Proterozoic
541 - 2500 Ma



ID: 3186372
Proterozoic crystalline metamorphic rocks

Age: Proterozoic (541 - 2500 Ma)

Lithology: Granitoid gneiss; 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]

Mesoproterozoic - Paleoproterozoic
1000 - 2500 Ma



ID: 3135900
Proterozoic I quartzite

Age: Proterozoic (1000 - 2500 Ma)

Description: undifferentiated metamorphic

Lithology: Major:{quartzite}, Minor{mica schist,marble,amphibolite}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

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)
Arendal kommune. Planprogram kommuneplan Bråstad-Stoa-Selde. Scenario for arealbruk. Arendal nov. 2008.

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