A RECONNAISSANCE PALEOMAGNETIC STUDY OF CRETACEOUS ROCKS FROM CENTRAL CUBA

被引:6
作者
CHAUVIN, A [1 ]
BAZHENOV, ML [1 ]
BEAUDOUIN, T [1 ]
机构
[1] RUSSIAN ACAD SCI,INST GEOL,MOSCOW 109017,RUSSIA
关键词
D O I
10.1029/94GL00416
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
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-degrees +/- 6-degrees 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-degrees +/- 11-degrees counterclockwise rotation of the Zaza terrane.
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页码:1691 / 1694
页数:4
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