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Late Mesoproterozoic (ca1.2 Ga) palaeomagnetism of the Albany-Fraser orogen: no pre-Rodinia Australia-Laurentia connection.

Pisarevsky, Sergei A.; Wingate, Michael T. D.; Harris, Lyal B. (2003). Late Mesoproterozoic (ca1.2 Ga) palaeomagnetism of the Albany-Fraser orogen: no pre-Rodinia Australia-Laurentia connection. Geophysical Journal International , vol. 155 , nº 1. F6-F11. DOI: 10.1046/j.1365-246X.2003.02074.x.

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Résumé

New palaeomagnetic data from metamorphic and mafic intrusive rocks of the Albany–Fraser orogen place Australia at high latitudes at ca 1.2 Ga, whereas existing data show that Laurentia occupied low latitudes at this time. No previous reconstructions linking Australia and Laurentia at ca 1.2 Ga are supported by our new data. The two continents moved independently during the early Grenville orogeny, although it is possible that late Mesoproterozoic convergence resulted in an AUSMEX configuration by 1070 Ma.

Type de document: Article
Mots-clés libres: Albany–Fraser orogen; dolerite dykes; Mesoproterozoic; metamorphism; palaeomagnetism; Rodinia
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 janv. 2021 19:22
Dernière modification: 08 janv. 2021 19:22
URI: http://espace.inrs.ca/id/eprint/11057

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