Gondwana breakup: messages from the North Natal Valley

Type Article
Date 2020-06
Language English
Author(s) Moulin MarylineORCID1, Aslanian DanielORCID1, Evain MikaelORCID1, Leprêtre Angelique1, 2, Schnurle PhilippeORCID1, Verrier Fanny1, Thompson Joseph Offei1, de Clarens P.3, Leroy S.4, Dias N.5, 6, The Pamela‐moz35 Team
Affiliation(s) 1 : Ifremer, REM/GM/LGS Centre de Brest 29280 Plouzané, France
2 : LGO, Laboratoire Geosciences Ocean IUEM CNRS 29280 Plouzané, France
3 : Total, R&D, avenue Larribau 64000 Pau , France
4 : UPMC, Univ Paris 6 CNRS UMR 7193 ISTEP 4 place Jussieu 75005 Paris, France
5 : ISEL, Instituto Superior de Engenharia de Lisboa Lisboa , Portugal
6 : IDL, Instituto Dom Luis Faculdade das Ciências da Universidade de Lisboa 1749‐016 Lisboa, Portugal
Source Terra Nova (0954-4879) (Wiley), 2020-06 , Vol. 32 , N. 3 , P. 205-214
DOI 10.1111/ter.12448
WOS© Times Cited 11
Abstract

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 paleo‐reconstructions of the Gondwana. This 30 km‐thick continental crust 1000 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.

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Moulin Maryline, Aslanian Daniel, Evain Mikael, Leprêtre Angelique, Schnurle Philippe, Verrier Fanny, Thompson Joseph Offei, de Clarens P., Leroy S., Dias N., The Pamela‐moz35 Team (2020). Gondwana breakup: messages from the North Natal Valley. Terra Nova, 32(3), 205-214. Publisher's official version : https://doi.org/10.1111/ter.12448 , Open Access version : https://archimer.ifremer.fr/doc/00598/71055/