Results 21 to 30 of about 4,946 (117)

Origin of Alkaline Basaltic Intrusive Rocks in an Exhumed Accretionary Complex: Implications for Past Petit‐Spot Volcanism in the Ocean

open access: yesGeochemistry, Geophysics, Geosystems, 2023
Accreted basaltic rocks are expected to provide information on intraplate volcanism in the oceans. Basaltic rocks, originating from mid‐ocean ridges, plateaus, and seamounts, have been reported from exhumed accretionary complexes. However, basaltic rocks
Ginta Motohashi   +3 more
doaj   +1 more source

Persistent Magma‐Rich Waves Beneath Mid‐Ocean Ridges Explain Long Periodicity on Ocean Floor Fabric

open access: yesGeophysical Research Letters, 2022
The ocean floor makes up the majority of the Earth's surface and yet, its geomorphology is not fully understood. Recent debate has focused on whether sea level changes—driven by Milankovitch glacial cycles—generate the abyssal hill fabric of the ocean ...
S. J. Sim
doaj   +1 more source

Complete mitochondrial genome sequence of the genus Austinograea (Malacostraca: Brachyura: Bythograeidae) and its phylogenetic analysis

open access: yesMitochondrial DNA. Part B. Resources, 2020
Austinograea species are restricted to hydrothermal vents and are typically considered to be omnivorous predators in vent communities. Here we present the complete mitochondrial genome of Austinograea sp. which was collected from Carlsberg Ridge, the mid-
Peng Xu, Yadong Zhou, Chunsheng Wang
doaj   +1 more source

Geodynamic Models of Melt Generation and Extraction at Mid-Ocean Ridges [PDF]

open access: yesOceanography, 2012
It is widely accepted that plate divergence at mid-ocean ridges drives mantle flow, mantle melting, and the formation of new oceanic crust. However, many of the details of this process remain obscure because of the inaccessibility of the mantle to direct
Patricia M. Gregg   +3 more
doaj  

The Energetic 2022 Seismic Unrest Related to Magma Intrusion at the North Mid‐Atlantic Ridge

open access: yesGeophysical Research Letters, 2023
A seismic swarm affected the 53.3°–54.3° Latitude North section of the Mid‐Atlantic Ridge from 26 September to 10 December 2022. We rely on regional, teleseismic and array data to relocate 61 hypocenters and derive 77 moment tensors.
S. Cesca   +3 more
doaj   +1 more source

Changes in water mass composition and circulation in the central Arctic Ocean between 2011 and 2021 inferred from tracer observations [PDF]

open access: yesOcean Science
The Arctic Ocean is changing rapidly and Atlantic Water circulation plays a key role in the warming, sea-ice decline, and ecosystem changes observed in the Arctic.
A.-M. Wefing   +9 more
doaj   +1 more source

Spatial Variations in the Degree of Upper‐Mantle Depletion in a Mid‐Ocean Ridge–Transform Fault System

open access: yesGeochemistry, Geophysics, Geosystems
Partial melting beneath a mid‐ocean ridge creates a chemically depleted layer in the uppermost mantle. This chemical depletion lowers the density of the lithosphere compared with the unmelted mantle.
M. Morishige
doaj   +1 more source

Patterns of Life on the Southern Mid-Atlantic Ridge: Compiling What is Known and Addressing Future Research [PDF]

open access: yesOceanography, 2012
The South Atlantic is one of the youngest of all the major oceans. It has prominent topographic features, in particular, the Mid-Atlantic Ridge. This feature largely determines deepwater circulation patterns that connect this ocean to the North Atlantic,
José Angel A. Perez   +6 more
doaj  

The Prediction, Verification, and Significance of Flank Jets at Mid-Ocean Ridges [PDF]

open access: yesOceanography, 2012
One aspect of ocean flow over mid-ocean ridges that has escaped much attention is the capacity of a ridge to convert oscillatory flows into unidirectional flows.
J. William Lavelle   +4 more
doaj  

Global variation of seismic energy release with oceanic lithosphere age

open access: yesScientific Reports, 2021
Variations in Mid Ocean Ridge seismicity with age provide a new tool to understand the thermal evolution of the oceanic lithosphere. The sum of seismic energy released by earthquakes during a time, and for an area, is proportional to its lithospheric age.
Nicolás Pinzón, Carlos A. Vargas
doaj   +1 more source

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