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Superimposed thermal histories in the southern limit of the Ossa Morena Zone - Portugal

2017-05Journal article Restricted access
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dc.contributor.authorFernandes, Paulo Manuel Carvalho
dc.contributor.authorLopes, Gilda
dc.contributor.authorMachado, G.
dc.contributor.authorPereira, Z.
dc.contributor.authorRodrigues, B.
dc.date.accessioned2019-11-20T15:07:39Z
dc.date.available2019-11-20T15:07:39Z
dc.date.issued2017-05
dc.description.abstractThe Mississippian volcano-sedimentary complex in the Toca da Moura - Cabrela areas represents remnants of intra-volcanic marine sedimentary basins, formed during the collision between the Ossa Morena Zone with the South Portuguese Zone. These rock units are unconformably overlain by the Pennsylvanian intramontane coal-bearing Santa Susana Basin. Vitrinite reflectance determinations from rocks of these two basins indicate two episodes of thermal maturation. During the first episode, the Toca da Moura - Cabrela volcano-sedimentary complexes attained high maturation levels, equivalent to anthracite coal rank (3.0-3.5% R-oran ), which pre-dates the middle Moscovian Santa Susana Basin. The Santa Susana Basin attained moderate maturation levels equivalent to bituminous coal rank (1.35-1.5% R-oran ) recording a second episode of thermal maturation. Here, peak thermal conditions did not overprint the first maturation episode. The observed effects of magmatic intrusion on the thermal maturity and the lack of any increase in vitrinite reflectance with depth through c. 400 m of section in borehole SDJ-1 indicate high geothermal gradients during the first maturation episode. A contemporaneous magmatic event associated with the c. 335-320 Ma Cuba-Alvito Gabbros/Diorites of the Beja Massif was the possible cause for the high geothermal gradients postulated for the first maturation episode. Burial under a post-upper Moscovian sedimentary cover was the most likely process to account for the maturation levels determined for the Santa Susana Basin and for the second episode of thermal maturation.
dc.description.sponsorshipPortuguese Foundation for Science and Technology
dc.identifier.doi10.1017/S0016756816000248
dc.identifier.issn0016-7568
dc.identifier.issn1469-5081
dc.identifier.urihttp://hdl.handle.net/10400.1/13149
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCambridge University Press
dc.relationTECTONOESTRATIGRAFIA E PALINOESTRAT. DAS BACIAS METAPELÍTICAS DO PALEOZÓICO SUPERIOR ASSOCIADAS À FAIXA DE CISALHAMENTO DE PORTO-COIMBRA-TOMAR W DE PORTUGAL: POTENCIAL DE HIDROCARBONETOS E MINERALOGIA DE ARGILAS
dc.relationPALYNOLOGY AND CARBON ISOTOPE STRATIGRAPHY OF THE ORDOVICIAN - SILURIAN ROCKS OF PORTUGAL: PALAEOGEOGRAPHIC AND PALAEOCLIMATIC IMPLICATIONS
dc.subjectAlentejo flysch group
dc.subjectTomar shear zone
dc.subjectIberian massif
dc.subjectGeodynamic implications
dc.subjectW Portugal
dc.subjectStratigraphy
dc.subjectProvenance
dc.subjectRocks
dc.subjectGeochronology
dc.subjectGeochemistry
dc.titleSuperimposed thermal histories in the southern limit of the Ossa Morena Zone - Portugal
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTECTONOESTRATIGRAFIA E PALINOESTRAT. DAS BACIAS METAPELÍTICAS DO PALEOZÓICO SUPERIOR ASSOCIADAS À FAIXA DE CISALHAMENTO DE PORTO-COIMBRA-TOMAR W DE PORTUGAL: POTENCIAL DE HIDROCARBONETOS E MINERALOGIA DE ARGILAS
oaire.awardTitlePALYNOLOGY AND CARBON ISOTOPE STRATIGRAPHY OF THE ORDOVICIAN - SILURIAN ROCKS OF PORTUGAL: PALAEOGEOGRAPHIC AND PALAEOCLIMATIC IMPLICATIONS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F23787%2F2005/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F48534%2F2008/PT
oaire.citation.endPage608
oaire.citation.issue3
oaire.citation.startPage591
oaire.citation.titleGeological Magazine
oaire.citation.volume154
person.familyNameFernandes
person.familyNameRodrigues Lopes
person.givenNamePaulo
person.givenNameGilda Maria
person.identifier422469
person.identifier417492
person.identifier.ciencia-id051D-A133-65D9
person.identifier.orcid0000-0003-4888-0230
person.identifier.orcid0000-0002-6866-5127
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id57197129025
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
rcaap.rightsrestrictedAccess
rcaap.typearticle
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relation.isAuthorOfPublication5cd06189-201b-4b3a-b8a7-d5c63941f17c
relation.isAuthorOfPublication.latestForDiscoverya2d98df3-a9c2-4364-a737-25b4e89df80b
relation.isProjectOfPublicationb4172068-08ad-4257-a7a5-982b24befc86
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