Show simple item record

dc.contributor.authorCooper, M.A.
dc.contributor.authorFerriday, I.L.
dc.contributor.authorHalls, C.
dc.contributor.authorBliss, G.M.
dc.coverage.spatial22293 Låmivatnet
dc.date.accessioned2020-08-26T13:19:06Z
dc.date.available2020-08-26T13:19:06Z
dc.date.issued1979
dc.identifier.urihttps://hdl.handle.net/11250/2675082
dc.description.abstractThe rocks of the Sorjusdalen area are divided into two distinct tectono-stratigraphic sequences, the lower termed the Pieske\/Vasten Nappe and the upper the Gasak Nappe. The mutual contact of the nappes is imbricate in character and is marked by several distinctive lithologies and tectonic features. The Sulitjelma Gabbro was intruded across this contact resulting in intrusive relationships with both tectono-stratigraphic sequences. There are three phases of folding in the area, but only F1 and F2 have any significant effect on the distribution of lithologies. F1, a phase of NE-SW trending isoclinal folds with an axial planar schistose foliation, is associated with nappe emplacement. The open, E-W trending F2 folds deform the F1 fabric and appear to be on the southern limb of a major F2 synform. Medium-pressure regional metamorphism reached its peak during F1, producing a pattern of inverted isograds; the easternmost structurally lower units are greenschist facies and the westernmost structurally highest units are middle amphibolite facies. The Sulitjelma Gabbro has a thermal aureole and yet is locally profoundly affected by regional metamorphism, indicating pre- to syn-metamorphic intrusion. The emplacement of the Gasak Nappe during F1, was likewise syn-metamorphic and just prior to the intrusion of the gabbro.
dc.language.isoeng
dc.relation.ispartofseriesNGU (351)
dc.rightsNavngivelse 4.0 Internasjonal
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no
dc.subjectOMDANNING
dc.subjectPETROGRAFI
dc.subjectGEOKRONOLOGI
dc.subjectSTRATIGRAFI
dc.subjectTEKTONIKK
dc.subjectMINERALISERING
dc.titleThe geology of the Sorjusdalen area, Nordland, Norway.
dc.typeJournal article
dc.description.localcode35944
dc.source.pagenumber31-50


Files in this item

Thumbnail

This item appears in the following Collection(s)

  • Artikler [1063]
    Artikler fra seriene NGU, NGU Bulletin og NGU Skrifter

Show simple item record

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