Blar i NGU Open Archive på forfatter "Grenne, Tor"
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The Ordovician Grøndalsfjell Intrusive Complex: Central Scandinavian Caledonides: field relations, petrography and emplacement
Meyer, Gurli B.; Grenne, Tor (NGU Bulletin (435), Journal article, 1999)The Grøndalsfjell Intrusive Complex (GIC) is part of a major plutonic province located in the Gjersvik Nappe of the Upper Allochthon in the Caledonides of Central Norway. Field relationships and petrography suggest that ... -
The Resfjell ophiolite fragment, southwest Trondheim region, central Norwegian Caledonides
Heim, Michael; Grenne, Tor; Prestvik, Tore (NGU Bulletin (409), Journal article, 1987)The Resfjell Complex of Meldal, southwestern Trondheim region, provides an almost ideal crosssection through the uppermost part of an ophiolite. The stratigraphically lowest rocks exposed are metagabbro wich are followed ... -
The sequential development of magmatic and ore-forming processes in the Fundsjø Group, Meråker district, Central Norway
Grenne, Tor; Birkeland, Anne; Solli, Arne; Hertogen, Jan; Sandstad, Jan Sverre; Erichsen, Eyolf (NGU Bulletin (427), Journal article, 1995) -
U-Pb age dating and paleotectonic significance of trondhjemite from the type locality in the Central Norwegian Caledonides
Dunning, Greg; Grenne, Tor (NGU Bulletin (437), Journal article, 2000)Zircon and titanite U-Pb data are reported from the trondhjemite type locality at Follstad, near Støren in Central Norway. A concordant fraction of aricular zircon and an overlapping fraction of titanite give an age of ... -
Volcanostratigraphy and eruptive products of the Jonsvatn greenstone formation, central Norwegian Caledonides.
Grenne, Tor; Roberts, David (NGU (387), Journal article, 1983)The predominantly volcanic, Ordovician, Jonsvatn greenstone formation comprises appr. 500 m of tholeiitic basalts and associated volcanic products, with interbedded sediments totalling some 100-200 m in thickness. In the ...