Results 11 to 20 of about 6,547 (194)

Seismic reflection imaging of the Juan de Fuca plate from ridge to trench : new constraints on the distribution of faulting and evolution of the crust prior to subduction [PDF]

Journal of Geophysical Research: Solid Earth, 2016
Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution.
Canales, J. Pablo, Carbotte, Suzanne M., Carton, Helene, Gibson, James C., Han, Shuoshuo, Horning, Gregory W., Nedimovic, Mladen R.   +6 more
core   +4 more sources

Upper crustal evolution across the Juan de Fuca ridge flanks [PDF]

Geochemistry, Geophysics, Geosystems, 2008
Recent P wave velocity compilations of the oceanic crust indicate that the velocity of the uppermost layer 2A doubles or reaches ∼4.3 km/s found in mature crust in <10 Ma after crustal formation. This velocity change is commonly attributed to precipitation of low‐temperature alteration minerals within the extrusive rocks associated with ridge‐flank ...
Nedimovic, Mladen R., Carbotte, Suzanne M., Diebold, John B., Harding, Alistair J., Canales, J. Pablo, Kent, Graham M.   +5 more
openaire   +4 more sources

Osmium isotopes in hydrothermal fluids from the Juan de Fuca Ridge [PDF]

Earth and Planetary Science Letters, 2000
We present Os data for axial high-temperature and off-axial low-temperature hydrothermal solutions from the Juan de Fuca Ridge. The high-temperature, H₂S-bearing axial fluids have unradiogenic Os isotopes pointing to a nearly complete domination of osmium isotopes from the basalts during hydrothermal circulation.
Sharma, M., Wasserburg, G. J., Hofmann, A. W., Butterfield, D. A.   +3 more
openaire   +5 more sources

Mid‐Ocean Ridge (MOR) Ash Dispersal on Axial Seamount, Juan de Fuca Ridge

Geochemistry, Geophysics, Geosystems
Rare eruption of primitive normal mid‐ocean ridge basalt (N‐MORB) magma (∼9.5 wt% MgO) on the summit of Axial Seamount generated abundant ash that was dispersed for several km.
Ryan A. Portner, Guangyu Xu, Arran P. Murch, David A. Clague, Brian M. Dreyer, Jennifer B. Paduan   +5 more
doaj   +2 more sources

Linkages between mineralogy, fluid chemistry, and microbial communities within hydrothermal chimneys from the Endeavour Segment, Juan de Fuca Ridge. [PDF]

Geochem Geophys Geosyst, 2016
Rock and fluid samples were collected from three hydrothermal chimneys at the Endeavour Segment, Juan de Fuca Ridge to evaluate linkages among mineralogy, fluid chemistry, and microbial community composition within the chimneys.
Lin TJ, Ver Eecke HC, Breves EA, Dyar MD, Jamieson JW, Hannington MD, Dahle H, Bishop JL, Lane MD, Butterfield DA, Kelley DS, Lilley MD, Baross JA, Holden JF.   +13 more
europepmc   +2 more sources

Asymmetric seafloor depth across the Juan de Fuca Ridge caused by lithospheric heating

Communications Earth & Environment, 2023
Previous studies attribute asymmetries across the East Pacific Rise to horizontal temperature or pressure gradients in the deep asthenosphere caused by the Pacific Superswell, which, however, cannot explain asymmetries observed across the Juan de Fuca ...
Mengyu Wu, Michael H. Ritzwoller
doaj   +1 more source

Dispersion of deep-sea hydrothermal plumes at the Endeavour Segment of the Juan de Fuca Ridge: a multiscale numerical study

Frontiers in Marine Science, 2023
A multiscale numerical framework has been developed to investigate the dispersion of deep-sea hydrothermal plumes that originate from the Endeavour Segment of the Juan de Fuca Ridge located in the Northeast Pacific.
Guangyu Xu, Christopher R. German
doaj   +1 more source

Chemical alteration of sediments on early stage of existing of hydrothermal systems in spreading zones of sedimented ridges (hydrothermal field “Dead Dog”, Middle Valley, Juan de Fuca Ridge) [PDF]

E3S Web of Conferences, 2019
In sediments from Holes DSDP 858B, D, F, located near the active hot vent on the thermal field “Dead Dog” in the northern part of the Juan de Fuca Ridge, Middle Valley, a redistribution of chemical elements occurs as a result of solution-rock interaction.
Khakhina Alexandra, Kurnosov Victor, Konovalov Yurii, Churkina Valeriya, Galin Konstantin   +4 more
doaj   +1 more source

Systematic shift in plume bending direction at Grotto Vent, Main Endeavour Field, Juan de Fuca Ridge implies changes in venting output along the Endeavour Segment

Frontiers in Earth Science, 2022
Analysis of the time-dependent behavior of the buoyant plume rising above Grotto Vent (Main Endeavour Field, Juan de Fuca Ridge) as imaged by the Cabled Observatory Vent Imaging Sonar (COVIS) between September 2010 and October of 2015 captures long term ...
Karen G. Bemis, Michael Zhao, Joshua Sacker, Dax C. Soule, Dax C. Soule   +4 more
doaj   +1 more source

IODP Expedition 327 and Atlantis Expedition AT 18-07: Observatories and Experiments on the Eastern Flank of the Juan de Fuca Ridge

Scientific Drilling, 2012
Integrated Ocean Drilling Program (IODP) Expedition 327 (summer 2010) was designed to resolve the nature of fluid-rock interactions in young, upper volcanic crust on the eastern flank of the Juan de Fuca Ridge. Expedition 327 drilled, cased and cored two
the IODP Expedition 327 and Atlantis Expedition AT18-07 Shipboard Parties, Hans Jannasch, Katerina Edwards, James Cowen, Katerina Petronotis, Keir Becker, C. Geoff Wheat, Jordan F. Clark, Andrew T. Fisher, Takeshi Tsuji   +9 more
doaj   +1 more source