georefid:2010-033717SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-07-06T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2010-033717<gco:CharacterString>Periodicity of hydrothermal system in the ocean over the Juan de Fuca Ridge (Leg 139, R/V "Joides Resolution")</gco:CharacterString>2004-01-01publicationgeorefid:2010-033717Tochilina, S. V.Russian Academy of Sciences, Far Eastern Division, Pacific Oceanological Institute, Vladivostok, Russian FederationauthorFar Eastern Geological Institute, Russian FederationpublisherdocumentHardcopyIn: Khanchuk, A. I. (editor), Gonevchuk, G. A. (editor), Mitrokhin, A. N. (editor), Simanenko, L. F. (editor), Cook, N. J. (editor), Seltmann, R. (editor), Metallogeny of the Pacific Northwest; tectonics, magmatism and metallogeny of active continental margins676-679In Pleistocene, the rift valley of Juan de Fuca area was characterized by complex sedimentation environment due to direct venting of fluids and the turbidite formation. Results of radiolarian analysis allowed us to determine the age and periodicity of the hydrothermal process activation: 300+ or -20, 200+ or -10, 100+ or -10, 41 K yr. Ecosystem analysis was ascertained that the periodicity may be related to the orbital fluctuation.completedOceanographyalgaeclimate forcingcorescyclic processesdiatomsEast Pacificfluctuationsgeothermal systemshydrothermal ventsInvertebrataisotope ratiosisotopesJuan de Fuca RidgeLeg 139microfossilsMiddle ValleyNorth PacificNortheast PacificO-18/O-16Ocean Drilling Programocean floorsorbital forcingoxygenPacific OceanperiodicityPlantaeProtistaRadiolariaresearch vesselsstable isotopesturbiditeurn:org.iodp:exp:139urnlargerWorkCitationcampaignEnglishgeoscientificInformation-128.4250-128.381548.260048.2730