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dc.contributor.authorSandstad, Jan Sverre
dc.contributor.authorOlerud, Svein
dc.coverage.spatialØSTRE TOTEN
dc.coverage.spatialGRAN
dc.coverage.spatial19154 Hurdal
dc.coverage.spatialHURDAL
dc.coverage.spatialVIKEN
dc.coverage.spatialINNLANDET
dc.date.accessioned2020-08-26T13:25:01Z
dc.date.available2020-08-26T13:25:01Z
dc.date.issued1983
dc.identifier.urihttps://hdl.handle.net/11250/2675169
dc.description.abstractThe Skrukklia Mo-occurence is situated in Precambrian gneisses along the northwest margin of the igneous complex of the Oslo Region. Within the mineralized area a Permian granite suite (the Aurtjern granite) intrudes the gneisses 2 km from the western border of the main igneous complex. The Aurtjern granite is a multistage intrusion of biotite granite. The gneisses are further cut by Permian dykes and hydrothermal breccias, the most important of the latter being the Glasberget breccia with a core of mainly pegmatitic quartz, and the Dalen breccias with matrix mainly of rock flour. Weak propylitic alteration and a weak stockwork of pyrite-bearing veinlets, defining a pyrite halo enclosing the mineralized area and the intrusives, are the most extensive alteration types in the area. Agrillic alteration is observed in some drill-cores. Quartz-sericite-pyrite and K-silicate alteration and albitization are seen in subordinate amounts. A low-grade molybdenite mineralization is found over an area of more than 2 km, occuring as a stockwork of thin (< 2mm) veinlets in the gneisses and partly in granite porphyries. Quartz-molybdenite and quartz-pyrite-molybdenite are the main paragenic types. The sulphide mineralizations and the alteration patterns in the area can be interpreted both as a porphyry molybdenum-like occurence and as a roof zone mineralization of granitic intrusion.
dc.language.isoeng
dc.relation.ispartofseriesNGU (387)
dc.rightsNavngivelse 4.0 Internasjonal
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no
dc.subjectPERM
dc.subjectPREKAMBRIUM
dc.subjectPETROGRAFI
dc.subjectMALMGEOLOGI
dc.subjectMOLYBDEN
dc.titleGeology of the Skrukkelia molybdenite deposit, northwest margin of the Oslo Graben, Norway.
dc.typeJournal article
dc.description.localcode35069
dc.source.pagenumber1-20


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    Artikler fra seriene NGU, NGU Bulletin og NGU Skrifter

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal