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Lithostratigraphy and structural setting of the Banda Terrane and Gondwana Sequence on the Northeast of Oecusse Enclave, Timor-Leste

2025-04Journal article Open access
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambiente
dc.contributor.authorde Sousa Vicente, Victor Aleluia
dc.contributor.authorPratas, João
dc.contributor.authorLopes, Fernando Carlos
dc.contributor.authorHarris, Ronald
dc.date.accessioned2025-07-02T10:20:28Z
dc.date.available2025-07-02T10:20:28Z
dc.date.issued2025-04
dc.description.abstractABSTRACT: The limited geological information of the Oecusse enclave, coupled with its geotectonic complexity, makes it difficult to comprehend its geological context. To better understand the lithostratigraphy and tectonics of the northeastern sector of this territory, a new geological map was created, utilizing the interpretation of remote sensing data and field observations. The studied area consists mainly of the Banda terranes of Asian affinity, which partially correspond to metamorphic rocks, with a Jurassic protolith and mostly Eocene metamorphic age, at the base of the Lolotoe Complex, to deposits with basin facies from the Cretaceous (Palelo Group), associated with shallow water limestones from the Eocene (Dartollu Limestones) and to an Eocene-Pliocene volcanic series (Manamas Group). These units constitute of the thrust pile of a duplex of horse thrusts of Australian affinity (Gondwana Sequence), dominated by shallow-water Triassic silts, clays and carbonates. The roof thrusts have a NW-SE orientation and are linked by left lateral tear faults NE-SW oriented.eng
dc.description.abstractRESUMO: A escassa informação geológica do enclave de Oecusse, e a sua complexidade geotectónica, dificultam a boa compreensão do seu contexto geológico. Para melhor entender a litostratigrafia e a tectónica do sector nordeste deste território, elaborou-se nova cartografia geológica, recorrendo à interpretação de dados de deteção remota e às observações de campo. A área estudada é constituída principalmente por terrenos de Banda de afinidade asiática. Correspondem parcialmente a rochas metamórficas, com protólito jurássico e com metamorfismo de idade eocénica, na base do Complexo de Lolotoe, a depósitos com fácies de bacia do Cretácico (Grupo Palelo), associados a calcários de águas rasas do Eocénico (Calcários de Dartollu) e a uma série vulcânica do Eocénico-Pliocénico (Grupo Manamas). Estas unidades constituem os cavalgamentos-teto de um duplex de escamas de cavalgamento, de afinidade Australiana (Sequência Gondwana), dominadas por siltes, argilas e carbonatos de águas rasas do Triássico. Os cavalgamentos-teto possuem direção NW-SE e estão conectados por falhas de desligamento esquerdo (tear faults), de orientação NE-SW.por
dc.description.sponsorshipInstituto de Geociências de Timor-Leste; COMPETE 2020 – Operational Program Competitiveness and Internationalization (project: POCI-01-0145-FEDER-006922).
dc.identifier.citationVicente, V., Pratas, J., Lopes, F.C. & Harris, R. (2025). Lithostratigraphy and structural setting of the Banda Terrane and Gondwana Sequence on the Northeast of Oecusse Enclave, Timor-Leste. In: Comunicações Geológicas, 2025, vol. 112, Fascículo Especial I, pp. 407-410. https://doi.org/1010.34637/2r6b-5844
dc.identifier.doi1010.34637/2r6b-5844
dc.identifier.eissn1647-581X
dc.identifier.issn0873-948X
dc.identifier.urihttp://hdl.handle.net/10400.9/5911
dc.language.isoeng
dc.peerreviewedyes
dc.publisherLNEG - Laboratório Nacional de Energia e Geologia
dc.relationResearch Centre Didactics and Technology in the Education of Trainers
dc.relationGeosciences Center
dc.relationCentre for Earth and Space Research of the University of Coimbra
dc.relationValorização de recursos geológicos em países ACP tendo em conta os ODS ONU
dc.relation.hasversionhttps://www.lneg.pt/wp-content/uploads/2025/04/81_Vicente-et-al.pdf
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectLithostratigraphy
dc.subjectStructural setting
dc.subjectBanda Terrane
dc.subjectGondwana sequence
dc.subjectOecusse enclave
dc.subjectLitostratigrafia
dc.subjectContexto estrutural
dc.subjectTerreno de Banda
dc.subjectSequência Gondwana
dc.subjectEnclave de Oecusse
dc.titleLithostratigraphy and structural setting of the Banda Terrane and Gondwana Sequence on the Northeast of Oecusse Enclave, Timor-Lesteeng
dc.title.alternativeLitostratigrafia e contexto estrutural do Terreno de Banda e da Sequência Gondwana no Noroeste do Enclave de Oecusse, Timor-Lestepor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleResearch Centre Didactics and Technology in the Education of Trainers
oaire.awardTitleGeosciences Center
oaire.awardTitleCentre for Earth and Space Research of the University of Coimbra
oaire.awardTitleValorização de recursos geológicos em países ACP tendo em conta os ODS ONU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00194%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00073%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00611%2F2020/PT
oaire.awardURIhttp://hdl.handle.net/10400.9/5910
oaire.citation.endPage410
oaire.citation.issueEspecial I
oaire.citation.startPage407
oaire.citation.titleComunicações Geológicas
oaire.citation.volume112
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
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oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNamede Sousa Vicente
person.familyNameLopes
person.familyNameHarris
person.givenNameVictor Aleluia
person.givenNameFernando Carlos
person.givenNameRonald
person.identifier.ciencia-id6D1C-A6EC-995F
person.identifier.orcid0000-0001-7851-1183
person.identifier.orcid0000-0002-3374-9857
person.identifier.orcid0000-0001-5179-9877
person.identifier.scopus-author-id23005217200
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
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Volume 112 (2025) Fascículo Especial I - XI Congresso Nacional de Geologia