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Detrital zircon U-Pb geochronology of the moatize and n'condédzi coalfields, zambezi karoo basin of Mozambique: implications for provenance, sediment dispersal and basin evolution

2024-12Journal article Open access
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dc.contributor.authorFernandes, Paulo
dc.contributor.authorJorge, Raul C. G. S.
dc.contributor.authorAlbardeiro, Luís
dc.contributor.authorChew, David
dc.contributor.authorDrakou, Foteini
dc.contributor.authorPereira, Zélia
dc.contributor.authorMarques, João
dc.date.accessioned2024-11-29T11:44:12Z
dc.date.available2024-11-29T11:44:12Z
dc.date.issued2024-12
dc.description.abstractDetrital zircon U-Pb geochronology of the Moatize and N'Condedzi coalfields in the Zambezi Karoo Basin of Mozambique provides key insights into the regional provenance, sediment dispersal pathways and basin evolution. Borehole cores from the two coalfields reveal a stratigraphy spanning the early Roadian (middle Permian) to the Carnian (Upper Triassic). The Permian sandstones of the Moatize Coalfield (MC) yield three detrital zircon populations, with ages ranging from 1150 to 950 Ma, 900-780 Ma and 650-490 Ma. In contrast, the Permian sandstones of the N'Condedzi Coalfield (NC) have only one population, which ranges from 1150 to 950 Ma. During the Permian, the provenance area for the NC was the Tete-Chipata Terrane and Malawi Complex (1150-950 Ma) to the north-northeast. In the MC, the detrital zircon populations of the early lake delta depositional setting (Roadian to Wordian) indicate a main provenance in the Zambezi Belt (900-780 Ma) located to the south of the MC, with minor sourcing from the Nampula Block (1150-950 Ma and 650-490 Ma) to the east. The transition from a lake delta to an alluvial depositional setting is attributed to a major tectonic event in the MC, which involved the formation of a braided channel belt. Sandstones from this braided channel belt yield three detrital zircons populations (650-490 Ma, 900-780 Ma and 1150-950 Ma), indicating provenance from both the Zambezi Belt and the Nampula Block. The overlying sandstones in the MC show only a minor population from the Zambezi Belt (900-780 Ma), implying a shift in provenance to the Nampula Block that was likely induced by tectonics. The absence of detrital zircon populations of 900-780 Ma and 650-490 in the Permian sandstones of NC implies that the two coalfields were not connected during the mid to late Permian. It is likely that an intra-rift horst (the Mesoproterozoic Gabbro-Anorthosite Tete Suite) separated the two coalfields. The Lower Triassic sandstones of the NC yield a main detrital zircon population indicating provenance from the TeteChipata Terrane and Malawi Complex (1150-950 Ma). A minor population at 650-490 Ma is linked to increased aridity at the Permian - Triassic boundary, which caused expansion of the watershed across the Tete-Chipata Terrane and the Malawi Complex. The Upper Triassic sandstones in the NC yield a 1150-950 Ma detrital zircon population, indicating provenance from the Tete-Chipata Terrane and Malawi Complex and a return to the source-to-sink conditions seen in the mid to late Permian.eng
dc.description.sponsorship13/RC/2092_P2
dc.identifier.doi10.1016/j.jafrearsci.2024.105458
dc.identifier.issn1464-343X
dc.identifier.urihttp://hdl.handle.net/10400.1/26365
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationPermian-Triassic palaeoclimatic cycles of the Karoo Supergroup in Mozambique, and its implications on a changing world
dc.relationAquatic Research Infrastructure Network
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.relationInstituto Dom Luiz
dc.relation.ispartofJournal of African Earth Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectGeochronology
dc.subjectDetrital-zircon
dc.subjectIntracontinental extension
dc.subjectPermian-Triassic
dc.subjectKaroo
dc.subjectMozambique
dc.titleDetrital zircon U-Pb geochronology of the moatize and n'condédzi coalfields, zambezi karoo basin of Mozambique: implications for provenance, sediment dispersal and basin evolutioneng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitlePermian-Triassic palaeoclimatic cycles of the Karoo Supergroup in Mozambique, and its implications on a changing world
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardTitleInstituto Dom Luiz
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEO%2F30082%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00350%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50019%2F2020/PT
oaire.citation.titleJournal of African Earth Sciences
oaire.citation.volume220
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameFernandes
person.givenNamePaulo
person.identifier422469
person.identifier.ciencia-id051D-A133-65D9
person.identifier.orcid0000-0003-4888-0230
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id57197129025
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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