Palaeomagnetism of Upper Cretaceous volcanic rocks from Cabo de Sto. Agostinho,Brazil |
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| Authors: | A Schult SDC Guerreiro |
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| Institution: | Institut für Allgemeine und Angewandte Geophysik, Theresienstrasse 41, 8000 München 2 Federal Republic of Germany;Nucleo de Ciencias Geofisicas e Geológicas, UFPa. C.P. 1611, 66.000 Belém, Pará Brazil |
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| Abstract: | One hundred samples from nine sites in Upper Cretaceous volcanics (K/Ar age 85–99 m.y.) of the magmatic province of Cabo de Santo Agostinho, Pernambuco (8.4°S, 35.0°W) yield a mean direction of magnetizationD = 0.4°, I = ?20.6°withα95 = 4.8°, k = 114 after AF cleaning. All sites have normal polarity with a mean pole, named SAK10, at 87.6°N, 135°E withA95 = 4.5° which is close to other Upper Cretaceous poles for South America. These poles are compared with Upper Cretaceous poles of Africa for various reconstructions of the two continents. |
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