Clay diagenesis and low-grade metamorphism of Tithonian and Berriasian sediments in the Cameros Basin (Spain)

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dc.contributor.authorFernández Barrenechea, José María
dc.contributor.authorRodas González, Magdalena
dc.contributor.authorFrey, Martín
dc.contributor.authorAlonso Azcárate, Jacinto
dc.contributor.authorMas Mayoral, José Ramón
dc.date.accessioned2023-06-20T00:22:04Z
dc.date.available2023-06-20T00:22:04Z
dc.date.issued2011
dc.description.abstractThe clay mineral assemblages of the Tithonian and Berriasian sediments (Tera and Oncala Groups) in the eastern part of the Cameros basin are investigated at seven localities. The lowest-grade assemblage, located on the southern border of the basin, contains calcite + quartz + hematite + kaolinite + mixed-layer illite-smectite (R = 1, 6585% illite layers) + discrete illite (IC = 0.50.65D82y). Systematic increases in the illite and chlorite crystallinities suggest increasing metamorphic grade from the northwest part of the basin to the southeast. This trend does not follow the pattern previously described for the overlying late Berriasian–early Aptian sediments (Urbio´n and Enciso Groups), which exhibit a higher metamorphic grade. This may result from local variations in sedimentary facies, as well as the circulation of hot migratory fluids. Tertiary compression occurring long after the main metamorphic event is considered to be responsible for the enhanced illite and chlorite crystallinities measured in the SE extreme of the basin.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/17595
dc.identifier.issn0009-8558
dc.identifier.officialurlhttp://www.minersoc.org/pages/e_journals/clay.html
dc.identifier.urihttps://hdl.handle.net/20.500.14352/42464
dc.journal.titleClay minerals
dc.language.isoeng
dc.page.final333
dc.page.initial325
dc.publisherBlackwell Scientific publications
dc.rights.accessRightsopen access
dc.subject.cdu549.6(460)
dc.subject.keywordDiagenesis
dc.subject.keywordLow-grade metamorphism
dc.subject.keywordClay minerals
dc.subject.keywordIllite crystallinity
dc.subject.keywordChlorite crystallinity
dc.subject.ucmMineralogía (Geología)
dc.subject.unesco2506.11 Mineralogía
dc.titleClay diagenesis and low-grade metamorphism of Tithonian and Berriasian sediments in the Cameros Basin (Spain)
dc.typejournal article
dc.volume.number36
dspace.entity.typePublication
relation.isAuthorOfPublication3c69830b-43da-40f4-8cc4-8857118becaa
relation.isAuthorOfPublication1e2ae943-4fb6-493e-945f-f316d86cc89a
relation.isAuthorOfPublicationc6a33f32-53b8-4e29-93e8-94d356b58a19
relation.isAuthorOfPublication.latestForDiscovery3c69830b-43da-40f4-8cc4-8857118becaa
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