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Magnetic anomalies in the Indian Ocean and sea-floor spreading

1968; American Geophysical Union; Volume: 73; Issue: 6 Linguagem: Inglês

10.1029/jb073i006p02101

2156-2202

Xavier Le Pichon, James R. Heirtzler,

earthquake and tectonic studies

Journal of Geophysical Research (1896-1977)Volume 73, Issue 6 p. 2101-2117 Magnetic anomalies in the Indian Ocean and sea-floor spreading Xavier Le Pichon, Xavier Le PichonSearch for more papers by this authorJames R. Heirtzler, James R. HeirtzlerSearch for more papers by this author Xavier Le Pichon, Xavier Le PichonSearch for more papers by this authorJames R. Heirtzler, James R. HeirtzlerSearch for more papers by this author First published: 15 March 1968 https://doi.org/10.1029/JB073i006p02101Citations: 251AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract A reconnaissance survey of the magnetic anomaly pattern over the Indian Ocean is interpreted in terms of the spreading floor hypothesis. The recent movements of the oceanic crustal blocks and of the adjacent continents are deduced from an examination of the axial magnetic pattern over the mid-ocean ridge. An active branch of ridge runs SE-NW from south of Australia to the Gulf of Aden, and the spreading along its axis corresponds to a relative rotation of Africa away from Asia with the pole of rotation centered near 26°N and 21°E. A southwest branch of ridge running from Mauritius to south of Africa has not been the site of measurable spreading since the Mesozoic era. A description of the anomaly pattern over the flanks of the ridge leads to a hypothetical history of the fragmentation of the Gondwana continent. References Anonymous, Bathymetric magnetic and gravity investigations, H. M. S. 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