Results 1 to 10 of about 124,197 (248)

Competing effects of spreading rate, crystal fractionation and source variability on Fe isotope systematics in mid-ocean ridge lavas [PDF]

Scientific Reports, 2021
Two-thirds of the Earth is covered by mid-ocean ridge basalts, which form along a network of divergent plate margins. Basalts along these margins display a chemical diversity, which is consequent to a complex interplay of partial mantle melting in the ...
Marianne Richter, Oliver Nebel, Martin Schwindinger, Yona Nebel-Jacobsen, Henry J. B. Dick   +4 more
doaj   +2 more sources

Numerical model of crustal accretion and cooling rates of fast-spreading mid-ocean ridges [PDF]

Geoscientific Model Development, 2013
We designed a thermo-mechanical numerical model for fast-spreading mid-ocean ridge with variable viscosity, hydrothermal cooling, latent heat release, sheeted dyke layer, and variable melt intrusion possibilities.
P. Machetel, C. J. Garrido
doaj   +6 more sources

The Mantle Fe3+/ΣFe Ratio Has Doubled Since the Early Archean [PDF]

Nature Communications
How mantle redox state developed, particularly the mantle source associated with mid-ocean ridge-like settings, remains a subject of ongoing debate. Here, we employ thermodynamic-thermomechanical numerical simulations to explore the redox properties of ...
Xiao-Xi Zhu, Wen-Yong Duan, Taras Gerya, Xin Zhou, Jia-Cheng Tian   +4 more
doaj   +2 more sources

Deep electrical imaging of the extinct oceanic ridge in the southwestern sub-basin of the South China Sea

Frontiers in Marine Science, 2023
The resistivity structure of an extinct mid-ocean ridge is significant in understanding the evolution of a mid-ocean ridge from its spreading phase to its dying phase.
Yan Gao, Jianping Li, Jianping Li, Fuyuan Li, Ruwei Zhang, Ruwei Zhang, Yunsheng Zhao, Yunsheng Zhao, Zhanxiang He, Zhanxiang He   +9 more
doaj   +1 more source

MORGen: an Algorithm to Compute Spreading Centre and Transform Geometries from Simple Initial Plate Boundaries and Euler Rotations

Tektonika, 2023
The age structure of the global ocean floor is a key feature in paleogeographic reconstructions, which in turn forms the quantitative basis for Earth System Science.
Thomas van der Linden, Douwe van Hinsbergen   +1 more
doaj   +1 more source

Timing of Seafloor Spreading Cessation at the Macquarie Ridge Complex (SW Pacific) and Implications for Upper Mantle Heterogeneity

Geochemistry, Geophysics, Geosystems, 2021
The Macquarie Ridge Complex (MRC) on the Australia‐Pacific plate boundary south of New Zealand is an extinct mid‐ocean ridge that has experienced a complex tectonic history and produced highly heterogeneous mid‐ocean ridge basalts (MORBs).
Qiang Jiang, Renaud E. Merle, Fred Jourdan, Hugo K.H. Olierook, Martin J. Whitehouse, Katy A. Evans, Xuan‐Ce Wang, Chris E. Conway, Helen C. Bostock, Richard J. Wysoczanski   +9 more
doaj   +1 more source

Extreme Heterogeneity in Mid‐Ocean Ridge Mantle Revealed in Lavas From the 8°20′N Near‐Axis Seamount Chain

Geochemistry, Geophysics, Geosystems, 2021
Lavas that have erupted at near‐axis seamounts provide windows into mid‐ocean ridge mantle heterogeneity and melting systematics which are not easily observed on‐axis at fast‐spreading centers.
Molly Anderson, V. Dorsey Wanless, Michael Perfit, Ethan Conrad, Patricia Gregg, Daniel Fornari, W. Ian Ridley   +6 more
doaj   +1 more source

The Mode of Trench-Parallel Subduction of the Middle Ocean Ridge

Frontiers in Earth Science, 2021
Trench-parallel subduction of mid-ocean ridges occurs frequently in plate motion history, such as along the western boundary of the Pacific plate in the early Cenozoic and along the eastern boundary of the Pacific plate at present.
Xiaobing Shen, Wei Leng, Wei Leng
doaj   +1 more source

Trace Element Evidence of Subduction-Modified Mantle Material in South Mid-Atlantic Ridge 18–21°S Upper Mantle

Journal of Marine Science and Engineering, 2023
Mid-ocean ridge basalts (MORBs), produced at mid-ocean ridge where the continents and subduction zones are distant, are the product of partial melting of the upper mantle and their chemical composition can provide information about the mantle itself. The
Tianxiao Ji, Zhigang Zeng
doaj   +1 more source

Dense cold‐water coral garden of Paragorgia johnsoni suggests the importance of the Mid‐Atlantic Ridge for deep‐sea biodiversity

Ecology and Evolution, 2021
Mid‐ocean ridges generate a myriad of physical oceanographic processes that favor the supply of food and nutrients to suspension‐ and filter‐feeding organisms, such as cold‐water corals and deep‐sea sponges.
Telmo Morato, Carlos Dominguez‐Carrió, Christian Mohn, Oscar Ocaña Vicente, Manuela Ramos, Luís Rodrigues, Íris Sampaio, Gerald H. Taranto, Laurence Fauconnet, Inês Tojeira, Emanuel J. Gonçalves, Marina Carreiro‐Silva   +11 more
doaj   +1 more source