Results 11 to 20 of about 908,025 (260)

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+19 more sources

Spin Transition of Iron in Deep‐Mantle Ferromagnesite

open access: yesGeophysical Monograph Series, Page 115-125., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Jiachao Liu, Suyu Fu, Jung‐Fu Lin
wiley  

+14 more sources

Regional Geophysics of the Caribbean and Northern South America: Implications for Tectonics

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The Caribbean plate is an enclosed oceanic basin whose formation and evolution are controversial. In the most commonly accepted model, the Caribbean plate is mainly composed of the Caribbean Large Igneous Province (CLIP) and the buoyant characteristic of
Carol V. Barrera‐Lopez   +2 more
doaj   +1 more source

Three-dimensional topographic relief of the oceanic crust may control the occurrence of shallow very-low-frequency earthquakes in the Nankai Trough off Kumano

open access: yesEarth, Planets and Space, 2020
To explore a local relationship between geological structures and the occurrence of very-low-frequency earthquakes (VLFEs), a particular class of slow earthquakes with characteristic periods of 10–100 s, we investigated three-dimensional (3D) structural ...
Kazuya Shiraishi   +4 more
doaj   +1 more source

Visualization of attenuation structure and faults in incoming oceanic crust of the Nankai Trough using seismic attenuation profiling

open access: yesEarth, Planets and Space, 2018
Seismic attenuation properties were tested as indicators of lateral variation in geological structures and detection of faults within poorly reflective oceanic crust, on a seismic survey line along the Nankai Trough.
Tetsuro Tsuru   +4 more
doaj   +1 more source

Low-temperature oceanic crust alteration and the isotopic budgets of potassium and magnesium in seawater

open access: yes, 2020
Low-temperature ( δ 41 K∼0‰), which is ∼0.50‰ enriched relative to bulk silicate Earth (BSE, δ 41 K= -0.54‰). Here, we present a suite of isotopic systems ( δ 41 K, δ 26 Mg, δ 7 Li, 87Sr/86Sr) and major/minor elements in bulk rock, veins and mineral ...
Danielle P. Santiago Ramos   +3 more
semanticscholar   +1 more source

Tracing Recycled Crustal Materials in the Subcontinental Lithospheric Mantle Using Thallium Isotopes

open access: yesGeophysical Research Letters, 2022
Here we report the first set of thallium (Tl) isotope data in alkaline rocks from the North China Craton to constrain the nature of recycled materials in the metasomatized subcontinental lithospheric mantle.
Qing‐Feng Mei   +4 more
doaj   +1 more source

Ridge Jumps and Mantle Exhumation in Back-Arc Basins

open access: yesGeosciences, 2021
Back-arc basins in continental settings can develop into oceanic basins, when extension lasts long enough to break up the continental lithosphere and allow mantle melting that generates new oceanic crust.
Valentina Magni   +3 more
doaj   +1 more source

Aleutian basin oceanic crust [PDF]

open access: yesEarth and Planetary Science Letters, 2015
Abstract We present two-dimensional P-wave velocity structure along two wide-angle ocean bottom seismometer profiles from the Aleutian basin in the Bering Sea. The basement here is commonly considered to be trapped oceanic crust, yet there is a change in orientation of magnetic lineations and gravity features within the basin that might reflect later
G.L. Christeson, G.A. Barth
openaire   +1 more source

MODELING OF MOVING DEFORMABLE CONTINENTS BY ACTIVE TRACERS: CLOSING AND OPENING OF OCEANS, RECIRCULATION OF OCEANIC CRUST

open access: yesГеодинамика и тектонофизика, 2018
The evolution of the ‘mantle – moving deformable continents’ system has been studied by numerical experiments. The continents move self-consistently with the mantle flows of thermo-compositional convection.
A. M. Bobrov, A. A. Baranov
doaj   +1 more source

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