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The limpopo magma-rich transform margin, south Mozambique: 1. Insights from deep-structure seismic imaging

2021-11-25Journal article Restricted access
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dc.contributor.authorWatremez, L.
dc.contributor.authorLEROY, Sylvie
dc.contributor.authorD'Acremont, Elia
dc.contributor.authorRoche, Vincent
dc.contributor.authorEvain, Mikael
dc.contributor.authorLepretre, A.
dc.contributor.authorVerrier, F.
dc.contributor.authorAslanian, Daniel
dc.contributor.authorDias, Nuno
dc.contributor.authorAfilhado, Alexandra
dc.contributor.authorSchnurle, P.
dc.contributor.authorCastilla, R.
dc.contributor.authorDespinois, F.
dc.contributor.authorMoulin, M.
dc.date.accessioned2022-01-27T11:06:49Z
dc.date.available2022-01-27T11:06:49Z
dc.date.issued2021-11-25
dc.description.abstractA variety of structures results from the interplay of evolving far-field forces, plate kinematics, and magmatic activity during continental break-up. The east Limpopo transform margin, offshore northern Mozambique, formed as Africa and Antarctica separated during the mid-Jurassic period break-up of the Gondwana supercontinent. The nature of the crust onshore has been discussed for decades in an effort to resolve issues with plate kinematic models. Two seismic refraction profiles with coincident multichannel seismic reflection profiles allow us to interpret the seismic velocity structures across the margin, both onshore and offshore. These seismic profiles allow us to (a) delineate the major regional crustal domains; (b) identify widespread indications of magmatic activity; and (c) map crustal structure and geometry of this magma-rich transform margin. Careful examination of the profiles allows us to make the following observations and interpretations: (a) on land, continental crust is overlain by a >10-km thick volcano-sedimentary wedge related to an early rifting stage, (b) offshore, thick oceanic crust formed due to intense magmatic activity, and between the two (c) a 50-60-km wide transform zone where the crustal structures are affected by intense magmatic activity and faulting. The prominent presence of intrusive and extrusive igneous units may be attributed to the combination of a deep-seated melting anomaly and a trans-tensional fault zone running through thinned lithosphere that allowed melt to reach the surface. A comparison of the crustal thinning along other transform margins shows a probable dependence with the thermal and/or tectonic history of the lithosphere.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationWATREMEZ, L.; [et al] – T The limpopo magma-rich transform margin, south Mozambique: 1. Insights from deep-structure seismic imaging. Tectonics. ISSN 0278-7407. Vol. 40, N.º 12 (2021), pp. 1-29.pt_PT
dc.identifier.doi10.1029/2021TC006915pt_PT
dc.identifier.eissn1944-9194
dc.identifier.issn0278-7407
dc.identifier.urihttp://hdl.handle.net/10400.21/14210
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Geophysical Unionpt_PT
dc.relation.publisherversionhttps://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2021TC006915pt_PT
dc.subjectTransform marginpt_PT
dc.subjectMozambiquept_PT
dc.subjectMagmatismpt_PT
dc.subjectSeismic refractionpt_PT
dc.titleThe limpopo magma-rich transform margin, south Mozambique: 1. Insights from deep-structure seismic imagingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage29pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleTectonicspt_PT
oaire.citation.volume40pt_PT
person.familyNameLEROY
person.familyNamed'Acremont
person.familyNameRoche
person.familyNameEvain
person.familyNameAslanian
person.familyNameDias
person.familyNameAfilhado
person.givenNameSylvie
person.givenNameElia
person.givenNameVincent
person.givenNameMikael
person.givenNameDaniel
person.givenNameNuno
person.givenNameAlexandra
person.identifier1348964
person.identifier.ciencia-idDB10-5086-2205
person.identifier.ciencia-id7314-CD91-482F
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person.identifier.orcid0000-0002-3345-1401
person.identifier.orcid0000-0003-1482-3115
person.identifier.orcid0000-0002-4387-5785
person.identifier.orcid0000-0002-9394-606X
person.identifier.orcid0000-0001-7672-4476
person.identifier.orcid0000-0003-0256-8540
person.identifier.ridG-5956-2010
person.identifier.ridB-2778-2008
person.identifier.ridA-2267-2013
person.identifier.scopus-author-id6508332037
person.identifier.scopus-author-id53063345900
person.identifier.scopus-author-id6701517007
person.identifier.scopus-author-id56640885300
person.identifier.scopus-author-id24381876200
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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