Gondwana breakup: messages from the North Natal Valley

The Natal Valley, offshore Mozambique, is a key area for understanding the evolution of East Gondwana. Within the scope of the integrated multidisciplinary PAMELA project, we present new wide-angle seismic data and interpretations, which considerably alter Geoscience paradigms. These data reveal the...

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Veröffentlicht in:	Terra nova (Oxford, England) England), 2020-06, Vol.32 (3), p.205-214
Hauptverfasser:	Moulin, Maryline, Aslanian, Daniel, Evain, Mikael, Lepretre, Angelique, Schnurle, Philippe, Verrier, Fanny, Thompson, Joseph, De Clarens, Philippe, LEROY, Sylvie, Dias, Nuno, Afilhado, Alexandra, Apprioul, R., Bronner, A., Castilla, R., Corela, Carlos, Crozon, J., Davy, C., D'acremont, E., Droz, Laurence, Duarte, J. L., Fernagu, P., Ferrant, A., Fischer, M., Franke, D., Inguane, H., Jorry, Stephan, Jouet, G., Loureiro, Afonso, Le Bouteiller, P., Le Bihan, C., Mahanjane, S., Moocroft, D., Pelleau, P., Picot, M., Pierre, D., Pitel, M., Rabineau, M., Rombe, C., Roudaut, M., Senkans, A., Toucanne, Samuel
Format:	Artikel
Sprache:	eng
Schlagworte:	Continental crust Earth Sciences East Gondwana Geological time Geology Geophysics Geosciences, Multidisciplinary Magma Natal Valley Offshore Passive margins Physical Sciences Science & Technology Sciences of the Universe Sea level Seismic data Stratigraphy Tectonics
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Beschreibung
Zusammenfassung:	The Natal Valley, offshore Mozambique, is a key area for understanding the evolution of East Gondwana. Within the scope of the integrated multidisciplinary PAMELA project, we present new wide-angle seismic data and interpretations, which considerably alter Geoscience paradigms. These data reveal the presence of a 30-km-thick crust that we argue to be of continental nature. This falsifies all the most recent palaeo-reconstructions of the Gondwana. This 30-km-thick continental crust 1,000 m below sea level implies a complex history with probable intrusions of mantle-derived melts in the lower crust, connected to several occurrences of magmatism, which seems to evidence the crucial role of the lower continental crust in passive margin genesis.
ISSN:	0954-4879 1365-3121
DOI:	10.1111/ter.12448