Blar i Institutt for miljø- og naturvitskap på forfatter "Grenne, Tor"
-
Concurrent MORB-type and ultrapotassic volcanism in an extensional basin along the Laurentian Iapetus margin: Tectonomagmatic response to Ordovician arc-continent collision and subduction polarity flip
Gasser, Deta; Grenne, Tor; Corfu, Fernando; Bøe, Reidulv; Røhr, Torkil Sørlie; Slagstad, Trond (Peer reviewed; Journal article, 2021)Arc-continent collision, followed by subduction polarity flip, occurs during closure of oceanic basins and contributes to the growth of continental crust. Such a setting may lead to a highly unusual association of ultrapotassic ... -
Deep-water trace fossils in the Ilfjellet rift basin (Middle Ordovician), central Norwegian Caledonides
Smelror, Morten; Grenne, Tor; Gasser, Deta; Bøe, Reidulv (Peer reviewed; Journal article, 2022)The late Early to early Middle Ordovician Fjellvollen Formation, Central Norwegian Caledonides, is a part of the Ilfjellet Group volcano-sedimentary succession formed in a rift basin that opened along the Laurentian margin. ... -
Early - Middle Ordovician sedimentation and bimodal volcanism at the margin of Iapetus: the Trollhøtta–Kinna Basin of the central Norwegian Caledonides
Dalslåen, Bjørgunn Heggem; Gasser, Deta; Grenne, Tor; Augland, Lars Eivind; Andresen, Arild (Peer reviewed; Journal article, 2020)The late Neoproterozoic–Paleozoic Iapetus Ocean developed between Laurentia, Baltica, Siberia and Gondwana. Its Paleozoic closure history is recorded by volcano-sedimentary successions within the Caledonian orogen of ... -
Mid-Ordovician stratigraphy and volcanism in the Hølonda area, Scandinavian Caledonides: complex tectonomagmatic development following arc–continent collision near the Laurentian margin of Iapetus
Grenne, Tor; Gasser, Deta; Bøe, Reidulv; Corfu, Fernando; Skår, Øyvind; Slagstad, Trond (Peer reviewed; Journal article, 2023)The Hølonda area of the central Scandinavian Caledonides is a key for models of the Caledonian orogen owing to its Ordovician fauna of Laurentian affinity, now stranded on the Baltic side during opening of the North Atlantic. ... -
Ordovician shoshonitic to ultrapotassic volcanism in the central Norwegian Caledonides: The result of sediment subduction, mantle metasomatism and mantle partial melting
Dalslåen, Bjørgunn Heggem; Gasser, Deta; Grenne, Tor; Augland, Lars Eivind; Corfu, Fernando (Peer reviewed; Journal article, 2020)Shoshonitic to ultrapotassic, mantle-derived volcanic rocks found within certain accretionary and collisional settings have trace element patterns comparable to those of common arc-related rocks, but with extreme enrichments ... -
The Skuggliberga unit of the Oppdal area, central Scandinavian Caledonides: Calc-alkaline pyroclastic volcanism in a fluvial to shallow-marine basin following a mid-ordovician orogenic event
Dalslåen, Bjørgunn Heggem; Gasser, Deta; Grenne, Tor; Ganerød, Morgan; Andresen, Arild (Peer reviewed; Journal article, 2021)We present field observations, geochemical data and detrital zircon U–Pb ages from the newly defined Skuggliberga unit of the Oppdal area, central Norwegian Caledonides. The unit occurs in two separate areas, where it ... -
Tectonic evolution of syn- to late-orogenic sedimentary- volcanic basins in the central Norwegian Caledonides
Stokke, Ella Wulfsberg; Gasser, Deta; Dalslåen, Bjørgunn Heggem; Grenne, Tor (Journal article; Peer reviewed, 2018)We present new structural, geochemical and U–Pb zircon data from syn- to late-orogenic sedimentary–volcanic basins in the southwestern part of the Trondheim Nappe Complex, central Norwegian Caledonides. In this area, a ...