Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/105807
Campo DC Valoridioma
dc.contributor.authorUrgeles, Rogeren_US
dc.contributor.authorCanals, Miquelen_US
dc.contributor.authorRoberts, Johnen_US
dc.contributor.authorAlonso, Belénen_US
dc.contributor.authorAlonso, Ignacioen_US
dc.contributor.authorBaraza, Jesúsen_US
dc.contributor.authorSchultheiss, Peteren_US
dc.date.accessioned2021-03-16T11:00:20Z-
dc.date.available2021-03-16T11:00:20Z-
dc.date.issued1999en_US
dc.identifier.issn0377-0273en_US
dc.identifier.urihttp://hdl.handle.net/10553/105807-
dc.description.abstractIn situ subseafloor pore pressure results from the western flank of the island of La Palma, Canary lslands, are presented. The data, obtained with a Pop Up Pore Pressure lnstrument (PUPPI), provide constraints on the fluid circulation and its causes in a very special context: The sediment piles near an intraplate oceanic island built on the continental rise of the Northwest African Margin. The ambicnt pore prcssures estimatcd from 2- to 4-days-long records are ncgativc in almost ali cases with values, at depths of a few meters below sea floor, usually on the order of - 1 O to - 70 Pa. Excess pore pressures develop only in the distalmost areas. The permeabilities and compressibilities, obtained respectively from the decay of the insenion pressures and the amplirude of the tidally induced pore pressure variations, range between 2.5 x 10-18 and 6.6 X 10-16 m2, and 6.2 X 10-9 and 1.5 X 10-7 Pa-1• According to these permeabilities fluid flow is estimated to be mostly downward and usually on the range between O and -0.3 mm yr-1• However, from the excess pore pressure profile a complex pattern of fluid circulation is inferred where horizontal fluid motion cannot be neglected. Horizontal flow is probably controlled by signiticant contrasts in the permeability of the different layers. The prevailing downward fluid flow is abnormal for a classical passive margin. We thus interpret these results as the superposition to the loss of fluids by sediment compaction (on the continental rise), of a large-scale flow system stimulated by thermal buoyancy ( 100 km wide) related to the volcanic activity on thc island of La Palma.en_US
dc.languageengen_US
dc.relationMAR 98-0347, GRANDES (CICYT)en_US
dc.relationAMB94-0323, CRESCENT (CICYT)en_US
dc.relation.ispartofJournal of Volcanology and Geothermal Researchen_US
dc.sourceJournal of Volcanology and Geothermal Research [ISSN 0377-0273], v. 94, p. 305-321en_US
dc.subject250618 Sedimentologíaen_US
dc.titleFluid flow from pore pressure measurements off La Palma, Canary Islandsen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.typeArticleen_US
dc.description.lastpage321en_US
dc.description.firstpage305en_US
dc.relation.volume94en_US
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.description.notasSNV " Las Palmas" Shipboard Party: Belén Alonso, Ignacio Alonso, Jesús Baraza y Peter Schultheissen_US
dc.description.numberofpages17en_US
dc.utils.revisionen_US
dc.identifier.ulpgcen_US
dc.contributor.buulpgcBU-BASen_US
dc.description.jcr1,049
dc.description.jcrqQ2
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.orcid0000-0002-9663-0773-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNameAlonso Bilbao, Ignacio-
Colección:Artículos
Vista resumida

Visitas

64
actualizado el 17-feb-2024

Google ScholarTM

Verifica


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.