Results 31 to 40 of about 126,508 (258)

Geochemistry of mafic extrusive lavas in the Bayankhongor Ophiolite, Mongolia

open access: yesMongolian Geoscientist
This study presents new geochemical data on pillow lavas from the Bayankhongor Ophiolite in western Mongolia, revealing compositions that range from sub-alkaline to alkaline basalts.
Bayarmaa Batsukh   +4 more
doaj   +1 more source

Hydroacoustic Monitoring of Oceanic Spreading Centers: Past, Present, and Future [PDF]

open access: yesOceanography, 2012
Mid-ocean ridge volcanism and extensional faulting are the fundamental processes that lead to the creation and rifting of oceanic crust, yet these events go largely undetected in the deep ocean.
Robert P. Dziak   +2 more
doaj  

Thermal segmentation of mid-ocean ridge-transform faults [PDF]

open access: yes, 2017
Author Posting. © American Geophysical Union, 2017. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution.
Behn, Mark D.   +2 more
core   +1 more source

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

Transfer learning reconstructs submarine topography for global mid-ocean ridges

open access: yesInternational Journal of Applied Earth Observations and Geoinformation
Mid-ocean ridges are unique, tectonically active geographical units on Earth that profoundly control the ocean environment and dynamics at the global scale.
Yinghui Jiang   +5 more
doaj   +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  

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

A hydrous melting and fractionation model for mid-ocean ridge basalts: Application to the Mid-Atlantic Ridge near the Azores [PDF]

open access: yes, 2004
The major element, trace element, and isotopic composition of mid-ocean ridge basalt glasses affected by the Azores hotspot are strongly correlated with H2O content of the glass.
Asimow, Paul D.   +2 more
core   +2 more sources

The distribution of helium 3 in the deep Western and Southern Indian Ocean [PDF]

open access: yes, 1992
Almost a decade after the Geochemical Ocean Sections Study Indian Expedition, the new deep 3He data from the INDIGO program give a further insight into the distribution of this tracer in the Indian Ocean.
Andrié, Chantal   +4 more
core   +2 more sources

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

open access: yesThe Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro   +1 more
wiley   +1 more source

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