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The thermal history and hydrocarbon source rock potential of the mid Carboniferous Quebradas Formation in SW Portugal and its correlatives in western Atlantic offshore basins

2010Conference object Open access
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dc.contributor.authorClayton, Geoff
dc.contributor.authorFernandes, Paulo
dc.contributor.authorGoodhue, R.
dc.contributor.authorMcCormack, Niall
dc.contributor.authorMusgrave, J. A.
dc.contributor.authorO'Donoghue, E. P.
dc.date.accessioned2014-09-23T14:19:26Z
dc.date.available2014-09-23T14:19:26Z
dc.date.issued2010
dc.date.updated2014-09-23T10:13:29Z
dc.description.abstractThe mid Carboniferous Quebradas Formation of the ‘South Portuguese Zone’ (SPZ) comprises 80m of post-mature black mudrocks with a mean TOC of 2.5%. Lithostratigraphic units of similar facies and age such as the Holywell Shale, the Edale Shale and the Bowland Shale are important HC source rocks in the UK, having sourced a considerable proportion of the hydrocarbons in the East Irish Sea, East Midlands and Formby oilfields respectively. The kerogen content of the Quebradas Formation is mixed but slightly more oil-prone in its lower part. At outcrop, it is strongly post-mature with vitrinite reflectance (Rr) ca. 4%. Illite crystallinity results from the Quebradas Formation and associated units suggest lower maturity than vitrinite reflectance. Analysis of the optic fabric of very thin coal lenses within the Brejeira Formation which overlies the Quebradas Formation suggests that peak temperatures were attained before the Variscan (late Carboniferous – early Permian) deformation. Triassic rocks unconformably overlying the Carboniferous sequence are much less mature, with Rr ca. 1.2%. Although the the Quebradas Fm has no HC source potential onshore due to its high maturity, Carboniferous rocks offshore may not have experienced the same extreme thermal history as the SPZ.por
dc.identifier.citationClayton, Geoff; Fernandes, Paulo; Goodhue, R.; McCormack, Niall; Musgrave, J.A.; O'Donoghue, E.P.The thermal history and hydrocarbon source rock potential of the mid Carboniferous Quebradas Formation in SW Portugal and its correlatives in western Atlantic offshore basins, Trabalho apresentado em II Central & North Conjugate Margins Conference - Lisbon, In II Central & North Conjugate Margins Conference - Lisbon. Book of Abstracts, Lisboa, 2010.por
dc.identifier.isbn978-989-96923-1-2
dc.identifier.otherAUT: PFE01874;
dc.identifier.urihttp://hdl.handle.net/10400.1/5075
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherMétodo Directopor
dc.relation.publisherversionhttp://metododirecto.pt/CM2010/index.php/vol/article/view/201/14por
dc.subjectPortugalpor
dc.subjectQuebradas Formationpor
dc.subjectCarboniferouspor
dc.subjectMaturitypor
dc.subjectThermal historypor
dc.titleThe thermal history and hydrocarbon source rock potential of the mid Carboniferous Quebradas Formation in SW Portugal and its correlatives in western Atlantic offshore basinspor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceLisboa, Portugalpor
oaire.citation.endPage54por
oaire.citation.startPage52por
oaire.citation.titleII Central & North Conjugate Margins Conference - Lisbon 2010por
oaire.citation.volumeIIIpor
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
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublicationa2d98df3-a9c2-4364-a737-25b4e89df80b
relation.isAuthorOfPublication.latestForDiscoverya2d98df3-a9c2-4364-a737-25b4e89df80b

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