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New evidence concerning the thermal history of Devonian and Carboniferous rocks in the South Portuguese Zone

2012-11Journal article Restricted access
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dc.contributor.authorFernandes, Paulo
dc.contributor.authorMusgrave, J. A.
dc.contributor.authorClayton, Geoff
dc.contributor.authorPereira, Zélia
dc.contributor.authorOliveira, José Tomás
dc.contributor.authorGoodhue, R.
dc.contributor.authorRodrigues, B.
dc.date.accessioned2014-09-24T10:25:16Z
dc.date.available2014-09-24T10:25:16Z
dc.date.issued2012-11
dc.date.updated2014-09-23T10:44:10Z
dc.description.abstractThe Late Palaeozoic rocks of southern Portugal have a complex thermal history. Vitrinite reflectance determinations from 90 samples confirm that the organic maturity of Late Palaeozoic rocks in SW Portugal is very high, mainly corresponding to meta-anthracite coal rank. The optic fabric of vitrinite in oriented coal samples from the Brejeira Formation suggests maturation under simple, non-tectonic, burial conditions with peak temperatures being attained prior to Variscan deformation. The lack of any increase in vitrinite reflectance with depth through c. 1 km of section in borehole AC-1 is not consistent with conductive heat transfer and is interpreted as the result of late synorogenic to post-orogenic advective heating. This heating episode generated temperatures sufficiently high to produce levels of maturity corresponding to metaanthracite coal rank through much of the terrane now exposed, but not high enough to result in overprinting of the pre-deformation optic fabric of vitrinite in the thin coals. The slightly lower maturity of older, platformfacies rocks in the Aljezur–Bordeira area may reflect either deposition on a basement high followed by less burial than adjacent parts of the basin, or the area being the site of a sink for descending relatively cool fluids.por
dc.identifier.citationFernandes, P.; Musgrave, J. A.; Clayton, G.; Pereira, Z.; Oliveira, J. T.; Goodhue, R.; Rodrigues, B. New evidence concerning the thermal history of Devonian and Carboniferous rocks in the South Portuguese Zone, Journal of the Geological Society, 169, 6, 647-654, 2012.por
dc.identifier.doihttp://dx.doi.org/10.1144/jgs2011-156
dc.identifier.issn0016-7649
dc.identifier.otherAUT: PFE01874;
dc.identifier.urihttp://hdl.handle.net/10400.1/5089
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherGeological Societypor
dc.titleNew evidence concerning the thermal history of Devonian and Carboniferous rocks in the South Portuguese Zonepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage654por
oaire.citation.issue6por
oaire.citation.startPage647por
oaire.citation.titleJournal of the Geological Societypor
oaire.citation.volume169por
person.familyNameFernandes
person.familyNameRodrigues
person.givenNamePaulo
person.givenNameBrígida
person.identifier422469
person.identifier.ciencia-id051D-A133-65D9
person.identifier.ciencia-id631C-A162-3F1E
person.identifier.orcid0000-0003-4888-0230
person.identifier.orcid0000-0001-9495-0813
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id57197129025
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationa2d98df3-a9c2-4364-a737-25b4e89df80b
relation.isAuthorOfPublication99ea34cc-7325-4ae7-b288-31d7e43ab28f
relation.isAuthorOfPublication.latestForDiscovery99ea34cc-7325-4ae7-b288-31d7e43ab28f

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