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MALMDATABASEN
Registrering 1111 - 021 Ørsland
(Objekt Id: 5000)
(Sist oppdatert: 09.02.2005)

Lokalisering
Fylke: Rogaland Kommune: Sokndal (1111)
Kart 1:50000: Sokndal (1311-4) Kart 1:250000: Mandal
Koordinatsystem: EU89-UTM Zone 32
Øst: 343149 m. Nord: 6474399 m.
Lengdegrad: 6.3173500 Breddegrad: 58.3822830
Kartvisning

Ressurs
Ressurstype: Jernmetaller (Fe, Mn, Ti) Ressursundertype: Jern-titan
Element(er): Fe Ti P
Betydning
Råstoffbetydning: Liten betydning (reg. 18.02.2015)


Mineralisering
Æra: Proterozoikum Periode: Neoproterosoikum
Genese: Ortomagmatisk Form:
Hovedtekstur: Min. fordeling:
Kornstørrelse: Hovedomvandling:
Strøk/Fall: Retning:
Feltstupning:
Ti-forekomst type(r)
Hovedtype: Magmatisk Ilm/Mt-forhold:
Subtype: Mt +/- Ilm +/- Ap i mafisk intrusjon %TiO(Malm): 003.0 - 006.0
Titan provins: Rogalands anothositt provins %P2O5(Malm): 1 - 3
Vertsbergart: Noritt %MgO(Ilm): 1 - 3
Hoved Ti mineral: Ilmenitt %V2O3(Mt):
ppm U (Rutil):
Stratigrafisk klassifikasjon av vertsbergart
Æra: Proterozoikum Periode: Neoproterosoikum
Provins: Sørnorske grunnfjellsprovins
Geotek.enhet:
Tektonisk complex:
Intrusivt komplex:
Gruppe: Formasjon:

Opplysning(er) i fritekstformat
Fri tekst
Oxide-rich modally layered rocks, containing ilmenite, magnetite and apatite. First described by Lenschow (1917), who dismissed it as an ilmenite deposit (sensu strictu) of significance. The cumulate suite is fairly mafic and can be followed along strike towards Bakka for 4-500 m.

Litteraturfortegnelser:
Fra NGU's Referansearkiv.:
Larsen, Rune B. , 1996
Distribution of Fe-Ti oxide minerals in the Ørsland, Bakka-Krune and Einebakka area of the Bjerkreim-Sokndal layered norite, Rogaland
;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.96.130;9 sider
Abstrakt:
Geological mapping in scale 1:5000 in the Sokndal Lobe of the Bjerkreim-Sokndal layered norite intrusion has confirmed that cyclic unit no.IV of the magmatic stratigraphy comprise a high density of Fe-Ti oxide rich layers. The area naturally divides in the Ørsland, Bakka-Krune and Einebakka areas which indi- vidually are shaped as mega-lenses connested to each other via more narrow zones. However, seen together they comprise an open synfom dipping 40o to the west. Zones with a high desity of Fe-Ti oxide rich layers has a patchy distri- bution exhibiting thicknesses from 1 to 120 meters and a limited extent along strike. The Bakka-Krune area has the largest size but the most patchy appearance of Fe-Ti oxides which makes it very difficult to evaluate the total resources. The Einebakka area comprise the largest continuous zone of Fe-Ti oxide rich layers with a documented strike length of 450 meters and thicknesses between 20 and 120 meters.


Faktaarket ble generert 28.03.2024

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