Results 81 to 90 of about 6,578 (212)

Hot Rocks and Massive Sulfide: Northern Juan de Fuca Ridge.

Eos, Transactions American Geophysical Union, 1992
Leg 139 of the Ocean Drilling Program (ODP), completed on September 11, was the first part of a proposed two‐leg program to investigate hydrothermal processes and products at seafloor‐spreading centers covered with sediment. Sedimented spreading centers are unique and provide ideal targets for drilling; a regionally continuous, relatively impermeable ...
BONI, MARIA, Ocean Drilling Program Leg 139 Scientific Party   +1 more
openaire   +3 more sources

Crustal magnetization and the subseafloor structure of the ASHES vent field, Axial Seamount, Juan de Fuca Ridge: Implications for the investigation of hydrothermal sites

Geophysical Research Letters, 2016
High‐resolution geophysical data have been collected using the Autonomous Underwater Vehicle (AUV) Sentry over the ASHES (Axial Seamount Hydrothermal Emission Study) high‐temperature (~348°C) vent field at Axial Seamount, on the Juan de Fuca Ridge ...
Fabio Caratori Tontini, Timothy J. Crone, Cornel E. J. deRonde, Daniel J. Fornari, James C. Kinsey, Eric Mittelstaedt, Maurice Tivey   +6 more
doaj   +1 more source

A preliminary 1-D model investigation of tidal variations of temperature and chlorinity at the Grotto mound, Endeavour Segment, Juan de Fuca Ridge [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. The definitive version was published in Geochemistry, Geophysics, Geosystems 18 (2017):
Bemis, Karen G., Larson, Benjamin I., Lilley, Marvin D., Xu, Guangyu   +3 more
core   +1 more source

Aligned hydrothermal fluid‐flow pathways in Middle Permian near‐shore marine sediments beneath a basaltic lava flow

Sedimentology, Volume 73, Issue 1, Page 83-102, January 2026.
ABSTRACT Tubular and curviplanar structures, outlined by the occurrence of haematite/goethite, chlorite, quartz and albite, are developed in the Middle Permian Broughton Formation in the southern Sydney Basin, New South Wales, Australia. These structures are interpreted as fluid‐flow pathways resulting from the ejection of heated pore fluids as a thick
Paul F. Carr, Brian G. Jones, G. R. Shi, Sangmin Lee, Mark A. Peterson, Karen E. Alley   +5 more
wiley   +1 more source

Post Eruption inflation of the East Pacific Rise at 9°50′ N

Geochemistry, Geophysics, Geosystems, 2014
In June 2008, we installed a geodetic network at 9°50′ N on the East Pacific Rise to track the long‐term movement of magma following the 2005/6 eruption. This network consists of 10 concrete benchmarks stretching from the ridge to 9 km off‐axis.
Scott L. Nooner, Spahr C. Webb, W. Roger Buck, Marie‐Helene Cormier   +3 more
doaj   +1 more source

Fluid Inclusion Petrography and Microthermometry of the Middle Valley Hydrothermal System, Northern Juan de Fuca Ridge [PDF]

, 1994
Middle Valley is a hydrothermally active, sediment-covered rift at the northernmost end of the Juan de Fuca Ridge. Two hydrothermal centers are known from previous work: (1) a 60-m-high sediment mound with a 35-m-high inactive sulfide mound and two 20 ...
Goodfellow, W. D., Leybourne, M. I., Peter, J. M.   +2 more
core   +1 more source

Millennial‐Scale Hydrothermal Variability at the Carlsberg Ridge Driven by Sea‐Level Change and Transient Magmatism

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Hydrothermal systems at mid‐ocean ridges (MORs) mediate the transfer of heat and geochemical fluxes from the mantle to the hydrosphere, facilitating fluid‐rock interaction and metal cycling. While short‐term hydrothermal dynamics are well studied, the long‐term response of these systems at slow‐spreading ridges to glacial‐interglacial sea ...
Sayantan De, Sunil Kumar Singh, Robin John   +2 more
wiley   +1 more source

Changes in Motion of the Nazca/Farallon Plate Over the Last 34 Million Years: Implications for Flat‐Slab Subduction and the Propagation of Plate Kinematic Changes

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract A high‐resolution sequence of finite‐rotation solutions spanning the past 34 Myr for the Nazca plate relative to the Pacific, Antarctic, and South American plates shows a pattern of 1–5‐Myr‐long intervals of nearly constant plate motion mostly separated by decelerations or accelerations lasting no longer than a few hundred thousand years ...
Douglas S. Wilson, Charles DeMets
wiley   +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

Magmatism at Incipient Rift, Galapagos Triple Junction: Tapping the Off‐Axis East Pacific Rise Melting Regime

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Incipient Rift (IR) is the latest in a sequence of short‐lived rifts that form ridge‐ridge‐ridge triple junctions with the East Pacific Rise (EPR) in the Galapagos triple junction region. IR extends ∼65 km southeastward from its intersection with the EPR at 2°40′N. IR originated ∼0.4 Ma; its opening rate is ∼15 km/Myr.
Deborah K. Smith, Hans Schouten, Emily M. Klein   +2 more
wiley   +1 more source