Results 41 to 50 of about 6,547 (194)
Changing Brine Inputs Into Hydrothermal Fluids: Southern Cleft Segment, Juan de Fuca Ridge
Geochemistry, Geophysics, Geosystems, 2020 In 2016, temperature recorders were recovered, temperatures were measured, and fluid samples were collected from Vent 1, a high temperature (338°C) hydrothermal discharge site on the southern Cleft Segment of the Juan de Fuca Ridge. Coupled with previous
C. Geoffrey Wheat +5 more
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Hydrothermal circulation within the Endeavour Segment, Juan de Fuca Ridge [PDF]
Geochemistry, Geophysics, Geosystems, 2010 Areas of the seafloor at mid‐ocean ridges where hydrothermal vents discharge are easily recognized by the dramatic biological, physical, and chemical processes that characterize such sites. Locations where seawater flows into the seafloor to recharge hydrothermal cells within the crustal reservoir are by contrast almost invisible but can be indirectly ...
Johnson, H. Paul +3 more
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A 65 k.y. time series from sediment-hosted glasses reveals rapid transitions in ocean ridge magmas [PDF]
, 2017 Studies of ocean ridge magmatism have been hampered by the difficulty in constructing time-series data over more than a few thousand years. Sediment rapidly covers newly formed ocean crust, and older rocks, even when recovered from fault scarps, cannot ...
Carbotte, SM +6 more
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Endeavour Segment of the Juan de Fuca Ridge: One of the Most Remarkable Places on Earth [PDF]
Oceanography, 2012 Endeavour Segment of the Juan de Fuca Ridge is one of three Integrated Study Sites for the Ridge 2000 Program. It is a remarkable, dynamic environment hosting five major hydrothermal fields, numerous smaller fields, and myriad diffuse-flow sites; magma ...
Deborah S. Kelley +14 more
doaj
Near‐axis crustal structure and thickness of the Endeavour Segment, Juan de Fuca Ridge
Geophysical Research Letters, 2016 A model of crustal thickness and lower crustal velocities is obtained for crustal ages of 0.1–1.2 Ma on the Endeavour Segment of the Juan de Fuca Ridge by inverting travel times of crustal paths and non‐ridge‐crossing wide‐angle Moho reflections obtained
Dax Soule +4 more
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Seafloor Positioning Across Juan De Fuca Ridge
, 1994 Abstract : The results of an analysis of a complex data set acquired during the United States Geological Survey's Marine Crustal Deformation Study are presented. The experiment, which commenced in the spring of 1992 in a region of the Pacific known as the Juan de Fuca ridge, represents a first attempt to locally monitor plate dynamics in the marine ...
Fell, Patrick, Seay, C. Harris
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Circulation, hydrography, and transport over the summit of Axial Seamount, a deep volcano in the Northeast Pacific [PDF]
, 2017 Author Posting. © American Geophysical Union, 2017. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution.
Lavelle, J. William, Xu, Guangyu
core +1 more source
, 2006 SeisCORK meeting, November 15 and 16, 2004, Stress/Mohr Engineering, Houston, Texas 77041-1205The purpose of this meeting was to explore design options to simultaneously acquire borehole seismic data and hydro-geological data (pressure, temperature ...
Becker, Keir +3 more
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Helium isotope variations in Juan De Fuca Ridge basalts
Geophysical Research Letters, 1993 We have measured ³He/4He ratios and He and Ne concentrations on a suite of 24 basalt glasses from the neovolcanic zone of the Juan de Fuca Ridge (JdFR) from 44.6°N near the Blanco Transform up to 48.0°N on the Endeavour Segment. The helium isotope ratios exhibit a clear geographic variation, with relatively constant values of 7.8 RA along the southern ...
John E. Lupton +3 more
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Magma Pockets Lie Stacked Beneath Juan de Fuca Ridge
Eos, 2021 Analysis of new imaging data suggests that vertically stacked magma chambers are short-lived and contribute to eruptions.
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