Mesozoic detachment faulting between Greenland and Norway: Inferences from Jan Mayen Fracture Zone system and associated alkalic volcanic rocks

The spatial relation between the Jan Mayen Fracture Zone system and two occurrences of early Tertiary, mantle-derived volcanic rock complexes indicates that an older, continental fault system may have had hidden extensions in the deep lithosphere. This is taken as indirect evidence that the inferred...

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Published in:Geology (Boulder) 1991-05, Vol.19 (5), p.481-484
Main Authors: Torske, Tore, Prestvik, Tore
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Language:English
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Prestvik, Tore
description The spatial relation between the Jan Mayen Fracture Zone system and two occurrences of early Tertiary, mantle-derived volcanic rock complexes indicates that an older, continental fault system may have had hidden extensions in the deep lithosphere. This is taken as indirect evidence that the inferred fracture- zone precursor may have acted as a transfer-fault system, linking rifts formed by opposing, simple-shear detachment faulting through the lithosphere. We infer that this contributed to continental rifting between Greenland and Norway in Mesozoic to Paleocene time, before sea-floor spreading began in the Norwegian- Greenland Sea region.
doi_str_mv 10.1130/0091-7613(1991)0192.3.CO;2
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title Mesozoic detachment faulting between Greenland and Norway: Inferences from Jan Mayen Fracture Zone system and associated alkalic volcanic rocks
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