Mathematics – Logic
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1691c&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 16, p. 1691-1694
Mathematics
Logic
2
Cretaceous Period, Cuba, Demagnetization, Geological Faults, Igneous Rocks, Paleomagnetism, Sedimentary Rocks, Tectonics, Lava, Magnetization, Metamorphism (Geology), Volcanology
Scientific paper
We applied thermal demagnetization to 12 sites of mid- and Upper Cretaceous volcanics and sediments of the Zaza terrane (central Cuba). Consistent directions of low- and/or high-temperature components were obtained from eight sites. The fold test performed on a short-wave fold in the Upper Cretaceous Arimao Formation is negative, as well as the conglomerate test on lava boulders from the same formation, whereas site-means for the entire data set are better grouped after tilt-correction. We conclude that the entire Cretaceous succession of the Zaza terrane was remagnetized in the Campanian. The measured latitude is lower by 15 deg +/- 6 deg with respect to the North American APWP indicating ca. 1600 +/- 600 km northward displacement of the Zaza terrane since the Campanian. Also discordant is the measured declination implying 37 deg +/- 11 deg counterclockwise rotation of the Zaza terrane.
Bazhenov Mikhail L.
Beaudouin Thierry
Chauvin Annick
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