Using a new high-resolution aeromagnetic survey (JAS-05) that was acquired along the
trend of the Jan Mayen Fracture Zone (JMFZ), west of the Vøring volcanic margin, we
investigated the geodynamic framework of the early spreading evolution of the Norwegian–
Greenland Sea. The tectonic structure, main faults and magnetic chrons have been
reinterpreted based on new magnetic gridded data and integrated with bathymetry, gravity
and seismic data. The new interpretation reveals more details about the early spreading …

39 The Norwegian–Greenland Sea comprises a complex system of active 40 and aborted
spreading ridges and oceanic basins, initiated in earliest 41 Eocene times after the
continental breakup between Eurasia and 42 Greenland. In the central part of the
Norwegian–Greenland Sea, the 43 Jan Mayen Fracture Zone (JMFZ) forms broad and
dominant scars on the 44 sea-floor and represents a major crustal boundary of the Northeast
45 Atlantic (Johnson and Eckhoff, 1966; Talwani and Eldholm, 1977)(Fig. 1). 46 This region …