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Mørkhøgda Pegmatite, Gjerstad, Agder, Norwayi
Regional Level Types
Mørkhøgda PegmatitePegmatite
GjerstadMunicipality
AgderCounty
NorwayCountry

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Latitude & Longitude (WGS84):
58° North , 8° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~15km
GRN:
N40E04
Type:
Pegmatite
Köppen climate type:
Dfb : Warm-summer humid continental climate
Mindat Locality ID:
49257
Long-form identifier:
mindat:1:2:49257:8
GUID (UUID V4):
0
Other/historical names associated with this locality:
Mørkhöiden
Other Languages:
Norwegian:
Mørkhøgda-pegmatitten, Gjerstad, Agder, Norge


Granite-pegmatite in the northern part of Gjerstad, located on the top of the hill Mørkhøgda (Bjørlykke 1937).

The name Mørkhøgda is not found on modern maps.

The name may be a misnomer for Morkeheia ? (an area visited by Harald Bjørlykke in 1933)
The NGU geological map, Gjerstad 1:50000 shows a pegmatite north of the farm Morka (near Morkheia), it may be that this is the Mørkhøgda pegmatite (See link to geological map below). The farm Morka is located at 58.91171°N 8.9344°E.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Cleavelandite
Formula: Na(AlSi3O8)
ⓘ Beryl
Formula: Be3Al2(Si6O18)
Habit: masses up to 20 cm in diameter
Colour: yellow,green
ⓘ Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ⓘ 'Fergusonite'
Description: Bjørlykke (1937) describes small fergusonite crystals as inclusions in beryl from this locality.
ⓘ 'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Habit: lenseshaped nodules and ill-defined crystals
Description: about 1 mm in diameter
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Quartz
Formula: SiO2
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Description: Described as "black tourmaline by BJørlykke (1937)
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
ⓘ Zircon
Formula: Zr(SiO4)
ⓘ Zircon var. Alvite
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ'Microlite Group'4.00.A2-mTa2X6-wZ-n
ⓘQuartz4.DA.05SiO2
ⓘEuxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘZircon
var. Alvite		9.AD.30Zr(SiO4)
ⓘ9.AD.30Zr(SiO4)
ⓘBeryl9.CJ.05Be3Al2(Si6O18)
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Cleavelandite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'Fergusonite'-

List of minerals for each chemical element

HHydrogen
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Beⓘ BerylBe3Al2(Si6O18)
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Zircon var. AlviteZr(SiO4)
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ ZirconZr(SiO4)
Oⓘ Albite var. CleavelanditeNa(AlSi3O8)
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ Albite var. CleavelanditeNa(AlSi3O8)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Albite var. CleavelanditeNa(AlSi3O8)
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Zircon var. AlviteZr(SiO4)
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ ZirconZr(SiO4)
Siⓘ Albite var. CleavelanditeNa(AlSi3O8)
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TiTitanium
Tiⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
MnManganese
Mnⓘ SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
YYttrium
Yⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ZrZirconium
Zrⓘ Zircon var. AlviteZr(SiO4)
Zrⓘ ZirconZr(SiO4)
NbNiobium
Nbⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
CeCerium
Ceⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TaTantalum
Taⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Taⓘ Microlite GroupA2-mTa2X6-wZ-n
ThThorium
Thⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
UUranium
Uⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

Other Regions, Features and Areas containing this locality

Baltic Shield (Fennoscandian Shield)Shield
Eurasian PlateTectonic Plate
EuropeContinent
Norway
ScandinaviaRegion

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

foreninger.uio.no (n.d.) https://foreninger.uio.no/ngf/ngt/pdfs/NGT_17_1_001-016.pdf
foreninger.uio.no (n.d.) https://foreninger.uio.no/ngf/ngt/pdfs/NGT_20_3&4_193-198.pdf
www.ngu.no (n.d.) https://www.ngu.no/upload/publikasjoner/Kart/B50/forelopig/16121.pdf
Bjørlykke, Harald (1937) Mineral paragenesis of some granite pegmatites near Kragerø, Southern Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 17 (1) 1-16
Oftedal, I. (1941) Enrichment of lithium in Norwegian cleavelandite-quartz pegmatites. Norsk Geologisk Tidsskrift. 20, 191-198 [a yellowish mica from Mørkhøgda used in the study]
Oftedal, Ivar (1944) Scandium in Biotite as a geologic thermometer. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 23 (4). 202-213 a muscovite from Mørkhøgda used in the study
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