首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Palaeomagnetic study of Permocarboniferous glacial varves from the Itarare Subgroup, southern Brazil
Authors:A M Sinito  D A Valencio  M Ernesto  I G Pacca
Institution:Consejo Nacional de Investigaciones Cientlficasy Técnicasde la República Argentina;Facultad de Ciências Exactas y Naturales de la Universidad de Buenos Aires, Ciudad Universithria, Pabellon 2, Buenos Aires, Argentina;Institute Astronômico e Geofisico da Universidade de São Paulo, Caixa Postal 30.627, 01000-São Paulo, Brazil
Abstract:Summary. A sequence of 167 glacial varves from Itu, State of São Paulo (Brazil), has been sampled for palaeomagnetic analysis. Since the varve thicknesses permit individual measurements, an attempt was made to compare annual palaeomagnetic results with recent observatory data. Inclination and declination plots show larger variations than those displayed by the present geomagnetic field. This could, however, be due to sedimentation factors since it may be assumed that the pattern of the present geomagnetic field variations is not greatly different from that of the Permocarboniferous field. In the next paper (Ernesto & Pacca) the experimental data are submitted to spectral analysis and the results support some of the hypotheses raised in this work.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号