Results 31 to 40 of about 50,990 (290)

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  

A Highly Depleted and Subduction‐Modified Mantle Beneath the Slow‐Spreading Mohns Ridge

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The Mohns Ridge is a very slow‐spreading ridge that, together with the Knipovich Ridge, marks the boundary between the North American and Eurasian plates in the Norwegian‐Greenland Sea.
A. Bjerga   +4 more
doaj   +1 more source

Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle [PDF]

open access: yes, 2016
Chemical reduction-oxidation mechanisms within mantle rocks link to the terrestrial carbon cycle by influencing the depth at which magmas can form, their composition, and ultimately the chemistry of gases released into the atmosphere.
Aulbach, Sonja, Stagno, Vincenzo
core   +1 more source

Active Long-Lived Faults Emerging Along Slow-Spreading Mid-Ocean Ridges [PDF]

open access: yesOceanography, 2012
In the classic mid-ocean ridge model, new seafloor is generated through a combination of magmatic diking feeding lava flows at the spreading axis, and the formation of short-offset, high-angle normal faults that dip toward the axis.
Deborah K. Smith   +3 more
doaj  

Radiocarbon constraints on the extent and evolution of the South Pacific glacial carbon pool

open access: yesNature Communications, 2016
On glacial/interglacial timescales CO2 might have been sequestered from the atmosphere and stored within the deep ocean. Here, the authors show that an old and CO2-rich water mass occupied the glacial South Pacific between ∼2,000 and 4,300 m water depth ...
T. A. Ronge   +8 more
doaj   +1 more source

A Common Origin for Ridge-and-Trough Terrain on Icy Satellites by Sluggish Lid Convection [PDF]

open access: yes, 2015
Ridge-and-trough terrain is a common landform on outer Solar System icy satellites. Examples include Ganymede's grooved terrain, Europa's gray bands, Miranda's coronae, and several terrains on Enceladus.
Barr, Amy C., Hammond, Noah P.
core   +1 more source

Hydrothermal Discharge During Submarine Eruptions: The Importance of Detection, Response, and New Technology [PDF]

open access: yesOceanography, 2012
Submarine volcanic eruptions and intrusions construct new oceanic crust and build long chains of volcanic islands and vast submarine plateaus. Magmatic events are a primary agent for the transfer of heat, chemicals, and even microbes from the crust to ...
Edward T. Baker   +5 more
doaj  

The Agulhas Ridge, South Atlantic: the peculiar structure of a fracture zone [PDF]

open access: yes, 2005
The Agulhas Ridge is a prominent topographic feature that parallels the Agulhas-Falkland Fracture Zone (AFFZ). Seismic reflection and wide angle/refraction data have led to the classification of this feature as a transverse ridge.
Gohl, Karsten   +1 more
core   +1 more source

The northern sector of the last British ice sheet : maximum extent and demise [PDF]

open access: yes, 2008
Strongly divided opinion has led to competing, apparently contradictory, views on the timing, extent, flow configuration and decay mechanism of the last British Ice Sheet.
Bradwell, Tom   +11 more
core   +2 more sources

Connectivity and divergence of symbiotic bacteria of deep-sea hydrothermal vent mussels in relation to the structure and dynamics of mid-ocean ridges

open access: yesFrontiers in Marine Science, 2022
The population divergence process of deep-sea vent invertebrates is driven by both biotic (e.g., dispersal during the larval stage) and abiotic factors such as deep-ocean currents, depth, and the geological setting of vents.
Sook-Jin Jang   +3 more
doaj   +1 more source

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