Results 61 to 70 of about 688 (177)

Seismicity, Repeating Earthquakes, and Tomographic Imaging of the Blanco Transform Fault System, Northeast Pacific

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract The Blanco transform fault system (BTFS) represents an evolving transform plate boundary in the Northeast Pacific Ocean. Its seismic behavior was captured with a dense network of 54 ocean‐bottom seismometers (OBS) operated for 1 year. We created a high‐resolution earthquake catalog based on different machine‐learning onset pickers.
D. Lange, Y. Ren, I. Grevemeyer
wiley   +1 more source

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, David W. Graham, John R. Delaney, H. Paul Johnson   +3 more
openaire   +1 more source

Magmatic effects of the Cobb hot spot on the Juan de Fuca Ridge [PDF]

Journal of Geophysical Research: Solid Earth, 2005
The interaction of the Juan de Fuca Ridge with the Cobb hot spot has had a considerable influence on the magmatism of the Axial Segment of the ridge, the second‐order segment that overlies the hot spot. In addition to the construction of the large volcanic edifice of Axial Seamount, the Axial Segment has shallow bathymetry and a prevalence of ...
John Chadwick, Michael Perfit, Ian Ridley, Ian Jonasson, George Kamenov, William Chadwick, Robert Embley, Petrus le Roux, Matthew Smith   +8 more
openaire   +1 more source

Temperature and pressure adaptation of a sulfate reducer from the deep subsurface

Frontiers in Microbiology, 2015
Microbial life in deep marine subsurface faces increasing temperatures and hydrostatic pressure with depth. In this study, we have examined growth characteristics and temperature-related adaptation of the Desulfovibrio indonesiensis strain P23 to the in ...
Katja eFichtel, Jörn eLogemann, Joerg eFichtel, Jürgen eRullkötter, Heribert eCypionka, Bert eEngelen   +5 more
doaj   +1 more source

Seismic Stratigraphy and Tectonic Evolution of the Forearc Georgia Basin (Upper Cretaceous–Miocene), Canada and USA, With Implications for CO2 Sequestration

Basin Research, Volume 38, Issue 3, May–June 2026.
2D seismic and well data reveal multi‐phase basin filling in the Whatcom Sub‐Basin shaped by syn‐depositional tectonism. An Eocene transition from forearc basin to forearc depression corresponds to decreasing normal‐fault density and throw, both upsection and eastward. Paleogene–Neogene strata are the best CO2 storage targets.
Francyne Bochi do Amarante, Shahin E. Dashtgard, Maziyar Nazemi, Andrew J. Calvert, H. Daniel Gibson   +4 more
wiley   +1 more source

Characterizing the Unique Chemical Imprint of On‐Axis, Lower‐Temperature Hydrothermal Flow to the Deep Ocean (Southern East Pacific Rise, 16.5°–18.0°S)

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract In addition to high‐temperature vents, lower‐temperature flow (LTF) (<300°C) is abundant along mid‐ocean ridges and contributes globally‐important fluxes of heat and water along with largely‐unconstrained geochemical influences on the ocean. We examined the impact of on‐axis LTF on the chemical composition of the overlying water column (<40 m ...
Laura E. Moore, Randelle M. Bundy, Joseph A. Resing, Scott White, Tamara Baumberger, Peter N. Sedwick, Nathaniel J. Buck, Anson M. Antriasian, Isaac Keohane, Bettina M. Sohst, Sharon L. Walker, Christopher R. German   +11 more
wiley   +1 more source

Distribution of hydrothermal manganese over the Juan De Fuca Ridge

Geophysical Research Letters, 1981
Bottom waters from five hydrographic stations, spaced equally along a 400‐km section of the Juan de Fuca Ridge north of the Blanco Fracture Zone, contain anomalously high concentrations of total dissolvable manganese (TDM). The two bottom‐most bottles from each hydrocast (∼ 100 to 200 m above bottom) range from 8.3 to 108.9 nmol kg−1 with a median ...
C. J. Jones, H. P. Johnson, J. R. Delaney   +2 more
openaire   +1 more source

Disaggregation of Landslide Risk

Earth's Future, Volume 14, Issue 4, April 2026.
Abstract Quantifying and disaggregating landslide risk through probabilistic landslide risk analysis (PLRA) is critical for land use regulation and risk reduction. However, no transferable model for PLRA currently exists that resolves landslide consequences to individual buildings at regional scales.
William Pollock, Joseph Wartman
wiley   +1 more source

Fault Friction, Plate Rheology, and Mantle Torques From a Global Dynamic Model of Neotectonics

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Improvements in software, parallel computing, global data sets, and laboratory flow‐laws help to develop the global Earth5 thin‐shell finite‐element model of Bird et al. (2008, https://doi.org/10.1029/2007jb005460) into a benchmark study. All experiments confirm that modeled faults (other than megathrusts) have low effective friction of 0.085 ±
Peter Bird, Jon Bryan May, Michele M. C. Carafa   +2 more
wiley   +1 more source

Cores drilled into active smokers on Juan de Fuca Ridge

Eos, Transactions American Geophysical Union, 1992
The October 1991 Chronology expedition to the Endeavour Segment of the Juan de Fuca Ridge sought to exploit shipboard and land‐based radioisotope analyses based on detailed geological observations and comprehensive sampling to determine the absolute ages of an actively venting ridge‐axis hydrothermal field.
Debra Stakes, Willard S. Moore, Tom Tengdin, Leon Holloway, Meg Tivey, Mark Hannington, John Edmond, James F. Todd   +7 more
openaire   +1 more source