Abstract

Values of the remanent magnetic intensity and inclination, initial susceptibility, and Koenigsberger ratios were obtained from basaltic material in four short core sections from three wells (Bjarni H81, two sections; Leif M48; Herjolf M92) drilled off Labrador. Published K–Ar dates are latest Jurassic to Early Cretaceous. Alternating-field (AF) demagnetization to 600 Oe (60 mT) and thermal demagnetization to 400 °C yielded stable, comparable remanent inclinations mostly of normal polarity for the Bjarni and Leif samples and revealed a change from reversed to normal polarity in the Bjarni well. Virtual pole position loci calculated from the paleoinclinations after AF and thermal treatment agree with published Early Cretaceous pole positions in the case of one Bjarni core, but the fit is poorer in the case of the second Bjarni core and the Leif core. These are the first paleomagnetic results from offshore Labrador.

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