Carbonate tufas as archives of climate and sedimentary dynamic in volcanic settings, examples from Gran Canaria (Spain)

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dc.contributor.authorRodríguez Berriguete, Álvaro
dc.contributor.authorCamuera, Jon
dc.contributor.authorAlonso Zarza, Ana María
dc.date.accessioned2023-06-22T12:26:31Z
dc.date.available2023-06-22T12:26:31Z
dc.date.issued2022-01
dc.description.abstractThree Holocene tufas from Gran Canaria volcanic island were studied with the aim of deciphering their sedimentary evolution through space and time. Las Temisas tufa (south-eastern arid part of the island) is dominantly composed of oncoids, intraclasts, phytoclasts, coated stems, minor thin stromatolites, and a high amount of siliciclastics. It was deposited in a fluvial system with variable flow velocities and palustrine conditions areas, which alternated with high energy events. Azuaje tufa (northern humid part of the island) is composed of coated stems, stromatolites, oncoids and phytoclasts, with relatively low amounts of siliciclastics, suggesting slow-flowing and palustrine conditions and a relatively low incidence of (high energy) floodings. Los Berrazales tufa (north-west of Gran Ganaria, the most humid one), is mainly composed of coated stems and crystalline crusts, formed in a laminar flow regime. Dominant clastic sedimentation in Las Temisas and high calcite growth rates in Los Berrazales led to a poor development of stromatolites in comparison with Azuaje. Las Temisas and Azuaje deposits have similar upward evolution with decreasing trend in siliciclastics and increasing trend in carbonates. However, Las Temisas has higher siliciclastic and lower phytoclastic contents suggesting a less vegetated area and more arid climate than in the other deposits. Additionally, tufas record local events common in volcanic terrains. Azuaje presents three units bounded by erosive discontinuities, which reveal significant erosion by enhanced runoff that could be caused by loss of vegetation due to wildfires related to volcanic eruptions at headwaters. Las Temisas record a possible interruption in sedimentation represented by aligned boulders due to rockfalls from the hillsides. These deposits formed from waters with similar chemistry providing to the carbonates their similar signals in δ13C–δ18O stable isotopes and 87Sr/86Sr ratios like that of the volcanic rocks. This work shows how, in volcanic areas, tufas are unique archives of the climate, vegetation and volcanic-related processes, because all imprint the sedimentary regime of tufa deposition.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/69501
dc.identifier.doi10.1111/sed.12908
dc.identifier.issn0037-0746
dc.identifier.officialurlhttps://onlinelibrary.wiley.com/doi/10.1111/sed.12908
dc.identifier.urihttps://hdl.handle.net/20.500.14352/72452
dc.issue.number1
dc.journal.titleSedimentology
dc.language.isoeng
dc.page.final218
dc.page.initial199
dc.publisherBlackwell Publishing Ltd
dc.relation.projectIDCGL2014-54818-P
dc.rights.accessRightsrestricted access
dc.subject.cdu552.545(460.413)
dc.subject.keywordCarbonate tufa
dc.subject.keywordclimate
dc.subject.keywordHolocene
dc.subject.keywordisotopes
dc.subject.keywordvolcanic island
dc.subject.keywordwildfires
dc.subject.ucmPetrología
dc.titleCarbonate tufas as archives of climate and sedimentary dynamic in volcanic settings, examples from Gran Canaria (Spain)
dc.typejournal article
dc.volume.number69
dspace.entity.typePublication
relation.isAuthorOfPublicationaedd54b2-0df6-4bb6-9401-72410a98f353
relation.isAuthorOfPublicationf29ff48e-a667-4a09-89eb-a8c1b3d55083
relation.isAuthorOfPublication.latestForDiscoveryaedd54b2-0df6-4bb6-9401-72410a98f353
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