Results 31 to 40 of about 6,547 (194)

Formation Waters Delineate Diverse Hydrogeologic Conditions at a Plate Scale: Eastern Flank of the Juan de Fuca Ridge

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The chemical composition of formation waters within the upper basaltic crust were calculated or measured at 24 sites on the northwest portion of the Juan de Fuca (JDF) Plate using data from sediment pore waters, scientific boreholes, and seafloor springs.
C. Geoffrey Wheat   +3 more
doaj   +1 more source

タイワ ヲ モチイタ ブッタイ ニンシキ ニ カンスル ケンキュウ [PDF]

open access: yes, 2008
To construct in situ velocity-porosity relationships for oceanic basalt, considering crack features, P- and S-wave velocity measurements on basaltic samples obtained from the eastern flank of the Juan de Fuca Ridge were carried out under confining ...
マキハラ, ヤスシ   +2 more
core   +1 more source

Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Quantifying eruption dynamics in submarine environments is challenging. During the 2015 eruption of Axial Seamount, the formation of hummocky mounds along the north rift was accompanied by tens of thousands of impulsive acoustic signals generated by the ...
M. Le Saout   +3 more
doaj   +1 more source

Genomic comparisons of a bacterial lineage that inhabits both marine and terrestrial deep subsurface systems [PDF]

open access: yesPeerJ, 2017
It is generally accepted that diverse, poorly characterized microorganisms reside deep within Earth’s crust. One such lineage of deep subsurface-dwelling bacteria is an uncultivated member of the Firmicutes phylum that can dominate molecular surveys from
Sean P. Jungbluth   +4 more
doaj   +2 more sources

Near-seafloor magnetic mapping of off-axis lava flows near the Kairei and Yokoniwa hydrothermal vent fields in the Central Indian Ridge [PDF]

open access: yes, 2018
The Kairei (KHF) and Yokoniwa hydrothermal fields (YHF) are hosted in mafic as well as ultramafic rocks distributed at an off-axis volcanic knoll of the Central Indian Ridge.
Kyoko Okino, Masakazu Fujii
core   +2 more sources

IODP Expedition 321T: Cementing Operations at Holes U1301A and U1301B, Eastern Flank of the Juan de Fuca Ridge [PDF]

open access: yesScientific Drilling, 2010
IODP Expedition 301 (Fisher et al., 2005a) was part of a series of expeditions and experiments to quantify hydrogeologic, lithologic, biogeochemical, and microbiological properties, processes, and linkages on the eastern flank of the Juan de Fuca Ridge ...
Andrew T. Fisher   +1 more
doaj   +3 more sources

Seismic velocity structure of the Juan de Fuca and Gorda plates revealed by a joint inversion of ambient noise and regional earthquakes

open access: yesGeophysical Research Letters, 2016
The crust and upper mantle seismic structure, spanning from the Juan de Fuca and Gorda spreading centers to the Cascade back arc, is imaged with full‐wave propagation simulation and a joint inversion of ambient noise and regional earthquake recordings ...
Haiying Gao
doaj   +1 more source

Timescale of open-reservoir evolution beneath the south Cleft segment, Juan de Fuca ridge [PDF]

open access: yes, 2011
International audienceLavas erupted at the southern end of the intermediate Juan de Fuca ridge (Cleft segment) are mostly cogenetic and their chemical diversity results from melt evolution in an open magma system.
Caroff, Martial   +2 more
core   +3 more sources

Animal community dynamics at senescent and active vents at the 9° N East Pacific Rise after a volcanic eruption [PDF]

open access: yes, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Gollner, S., Govenar, B., Arbizu, P. M., Mullineaux, L.
Arbizu, P. Martinez   +8 more
core   +2 more sources

Similar Microbial Communities Found on Two Distant Seafloor Basalts. [PDF]

open access: yes, 2015
The oceanic crust forms two thirds of the Earth's surface and hosts a large phylogenetic and functional diversity of microorganisms. While advances have been made in the sedimentary realm, our understanding of the igneous rock portion as a microbial ...
Chong, Lauren S   +3 more
core   +3 more sources

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