GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreFine-scale heat flow, shallow heat sources, and decoupled circulation systems at two sea-floor hydrothermal sites, Middle Valley, northern Juan de Fuca ridge
AuteurStein, J S; Fisher, A T; Langseth, M; Jin, W; Iturrino, G; Davis, E
SourceGeology vol. 26, no. 12, 1998 p. 1115-1118, https://doi.org/10.1130/0091-7613(1998)026<1115:fshfsh>2.3.co;2 (Accès ouvert)
Année1998
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 1998235
ÉditeurGeological Society of America
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1130/0091-7613(1998)026<1115:fshfsh>2.3.co;2
Mediapapier; en ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'ouest
Lat/Long OENS-128.5000 -128.0000 49.0000 48.0000
Sujetsevents hydrothermaux sous-marins; flux thermique; crevasses; regimes thermiques; analyses thermiques; réseaux de circulation de l'eau; système hydrothermal; temperature; Plaque de Juan de Fuca; hydrogéologie; géologie marine
Illustrationsprofiles
Résumé(disponible en anglais seulement)
Fine-scale heat-flow patterns at two areas of active venting in Middle Valley, a sedimented rift on the northern Juan de Fuca Ridge, provide thermal evidence of shallow hydrothermal reservoirs beneath the vent fields. The extreme variability of heat flow is explained by conductive heating immediately adjacent to vents and shallow circulation within sediments above the reservoir. This secondary circulation is hydrologically separated from the deeper system feeding the vents by a shallow conductive lid within the sediments. A similar separation of shallow and deep circulation may also occur at sediment-free ridge-crest hydrothermal environments.
GEOSCAN ID210127