Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/48697
DC FieldValueLanguage
dc.contributor.authorMenéndez, Inmaculadaen_US
dc.contributor.authorSilva, Pablo G.en_US
dc.contributor.authorMartín Betancor, Moisésen_US
dc.contributor.authorPérez-Torrado, Francisco Joséen_US
dc.contributor.authorGuillou ,Hervéen_US
dc.contributor.authorScaillet, S.en_US
dc.contributor.otherPerez-Torrado, Francisco Jose-
dc.contributor.otherSilva, Pablo G-
dc.contributor.otherMenendez, Inmaculada-
dc.contributor.otherscaillet, stephane-
dc.date.accessioned2018-11-24T00:09:10Z-
dc.date.available2018-11-24T00:09:10Z-
dc.date.issued2008en_US
dc.identifier.issn0169-555Xen_US
dc.identifier.urihttp://hdl.handle.net/10553/48697-
dc.description.abstractDigital analysis of torrential gullies (‘barrancos’) deeply incised into the volcanic Island of Gran Canaria (Canary Islands) allows us to extract the longitudinal profiles and pre-incision surfaces for individual basins, from which morphometric parameters (length, elevation, area, slope) have been calculated. Other derived parameters, such as ridgeline profiles, maximum incision values, volume removed by fluvial erosion, geophysical relief and isostatic uplift, have also been computed. Based on K/Ar ages for the island, well-constrained incision-uplift rates have been calculated by means of the combination of different methodological approaches commonly used in orogens and large mountain ranges. The geomorphological and morphometric analyses reveal that the island is clearly divided into four environmental quadrants determined by the combination of a couple of key-factors: the age of the volcanic surfaces and the climatic conditions. These factors determine a young sector covered with Plio-Quaternary platform-forming lavas (finished at 1.9–1.5 Ma) evolving under contrasting wet (NE) to dry (SE) climates, and an older sector, conserving the residual surfaces of the Miocene shield building (14.5–8.7 Ma) at the ridgelines, also subjected to wet (NW) and dry (SW) climates. Incision is related to the age zonation of the island. Maximum incisions (< 1200 m) are logically recorded in the older SW sector of the island, but incision rates are directly related to the climatic zonation, with maximum mean values in the wet Northern quadrants (0.18–0.12 mm/yr). The evaluation of the material removed by fluvial erosion for individual basins allows us to assess the consequent theoretical isostatic response in the different sectors of the island. The obtained uplift rates indicate that water availability (by drainage area and elevation) is a relevant controlling factor: the records from the wet Northern sectors show uplift values of between 0.09 and 0.03 mm/yr, whereas in the drier Southern sectors, the maximum values are under 0.015 mm/yr. Mean uplift rates obtained in this study are within the range of those inferred from stratigraphical markers, as is the case for horizons of raised Pliocene pillow-lavas (c.a. 4 Ma) uplifted between 46 and 143 m (0.014–0.024 mm/yr). The estimation of the bulk uplift promoted by fluvial unloading is of + 143 m for the entire island, and of + 71 m for the wet NE sector. These data explain 73% to 99% of the maximum uplift recorded by the raised Pliocene sea-level markers. This reflects that erosional unloading is a critical control factor in the uplift of the oceanic island, but is not capable of explaining the full recorded uplift in Gran Canaria. Additional sources of uplift, such as gravitational unloading, lithospheric flexure induced by adjacent islands, and/or volcanic underplating, are required. The theoretical onset of lithospheric bulging beneath Gran Canaria, as exerted by Tenerife, promoted a broad westwards tilting of the former from 3.8–3.5 Ma ago. This overall tilting accelerated fluvial incision, erosional unloading, and, therefore, the sustained differential uplift on the Eastern slope of the island over its last erosional stage. Considering mean uplift rates for the East and West sectors, Eastern values (0.024 mm/yr) are double than those in the West (0.011 mm/yr), supporting the role of lithospheric flexure of adjacent islands as an additional source of uplift. Complex feedback between fluvial unloading, differential uplift, orographic effect, lithospheric flexure, and volcanic underplating, seems to control the geomorphological development of hot-spot volcanic islands, after the gravitational collapse of stratovolcanos during their rejuvenation stage.en_US
dc.languageengen_US
dc.publisher0169-555X-
dc.relation.ispartofGeomorphologyen_US
dc.sourceGeomorphology [ISSN 0169-555X], v. 102, p. 189-203en_US
dc.subject250621 Vulcanologíaen_US
dc.subject250607 Geomorfologíaen_US
dc.subject.otherFluvial incisionen_US
dc.subject.otherIsostatic upliften_US
dc.subject.otherGeophysical reliefen_US
dc.subject.otherVolcanic islandsen_US
dc.subject.otherGran Canariaen_US
dc.titleFluvial dissection, isostatic uplift, and geomorphological evolution of volcanic islands (Gran Canaria, Canary Islands, Spain)en_US
dc.typeinfo:eu-repo/semantics/Articlees
dc.typeArticlees
dc.identifier.doi10.1016/j.geomorph.2007.06.022
dc.identifier.scopus53549086684-
dc.identifier.isi000260987500016-
dcterms.isPartOfGeomorphology-
dcterms.sourceGeomorphology[ISSN 0169-555X],v. 102 (1), p. 189-203-
dc.contributor.authorscopusid6701688947-
dc.contributor.authorscopusid7203089206-
dc.contributor.authorscopusid24332676400-
dc.contributor.authorscopusid6602207526-
dc.contributor.authorscopusid36950485500-
dc.contributor.authorscopusid6603812974-
dc.description.lastpage203-
dc.description.firstpage189-
dc.relation.volume102-
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.contributor.daisngid3252321-
dc.contributor.daisngid395603-
dc.contributor.daisngid13321861-
dc.contributor.daisngid1111499-
dc.contributor.daisngid34857662
dc.contributor.daisngid28049990-
dc.contributor.daisngid966647-
dc.identifier.investigatorRIDN-9727-2018-
dc.identifier.investigatorRIDG-8950-2015-
dc.identifier.investigatorRIDNo ID-
dc.identifier.investigatorRIDNo ID-
dc.utils.revisionen_US
dc.contributor.wosstandardWOS:Menendez, I
dc.contributor.wosstandardWOS:Silva, PG
dc.contributor.wosstandardWOS:Martin-Betancor, M
dc.contributor.wosstandardWOS:Perez-Torrado, FJ
dc.contributor.wosstandardWOS:Guillou, H
dc.contributor.wosstandardWOS:Scaillet, S
dc.date.coverdateNoviembre 2008
dc.identifier.ulpgces
dc.description.jcr2,339
dc.description.jcrqQ1
dc.description.scieSCIE
item.fulltextSin texto completo-
item.grantfulltextnone-
crisitem.author.deptGIR IOCAG:Geología Aplicada y Regional-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptDepartamento de Física-
crisitem.author.deptGIR Oceanografía Física y Geofísica Aplicada-
crisitem.author.deptDepartamento de Cartografía y Expresión Gráfica en La Ingeniería-
crisitem.author.deptGIR IUNAT: Geología de Terrenos Volcánicos-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptDepartamento de Física-
crisitem.author.orcid0000-0002-1801-5177-
crisitem.author.orcid0000-0002-4644-0875-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.parentorgDepartamento de Física-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.fullNameMenéndez González, Inmaculada-
crisitem.author.fullNameMartín Betancor, Moisés-
crisitem.author.fullNamePérez Torrado, Francisco José-
crisitem.author.fullNameGuillou ,Hervé-
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