Results 61 to 70 of about 9,129 (164)

Extreme Mantle Heterogeneity Revealed by Geochemical Investigation of In Situ Lavas at the Central Mohns Ridge, Arctic Mid‐Ocean Ridges

Geochemistry, Geophysics, Geosystems
Mid‐ocean ridge basalts reflect the mantle’s composition and reveal processes from melting to eruption. The Mohns and Knipovich Ridges have ultraslow spreading rates, low magma budgets and erupted lavas indicating various mantle domains.
Håvard Hallås Stubseid, Anders Bjerga, Leif‐Erik Rydland Pedersen, Rolf Birger Pedersen   +3 more
doaj   +1 more source

Mantle dynamics and petrogenesis of Gomer basalts in the Northwestern Ethiopia: A geochemical perspective

Open Geosciences
This study investigates the petrological and geochemical characteristics of basalts from the Gomer area in the Northwestern Ethiopian Volcanic Province to explore their petrogenesis and mantle source characteristics.
Wondem Habtamu, Teferi Minyahl, Jothimani Muralitharan, Wondem Demeke   +3 more
doaj   +1 more source

A Magnetotelluric Study of Mantle Heterogeneities Beneath the Northeastern United States

Geochemistry, Geophysics, Geosystems
Analysis of magnetotelluric (MT) data across the northern Appalachian region reveals significant mantle heterogeneity. By inverting a subset of long‐period EarthScope USArray MT data, we constructed a three‐dimensional electrical resistivity model that ...
Jae Deok Kim, Rob. L. Evans
doaj   +1 more source

Lithospheric Mantle Heterogeneity Drives Delayed Magmatism and Wide Continent‐Ocean Transitions in Rifted Margins

Geophysical Research Letters
The formation of wide, magma‐starved continent–ocean transition (COT) zones remains incompletely understood. We use 2‐D thermo‐mechanical numerical experiments, coupling hydrous mantle melting with parameterized crustal accretion, to explore controls on ...
Yuan Wang, Zhonglan Liu
doaj   +1 more source

Open- versus closed-system magmatism on Mars revealed by shergottites

Communications Earth & Environment
The origin of depleted, intermediate, and enriched geochemical reservoirs on Mars has long been debated, with competing models invoking mantle heterogeneity versus crustal contributions.
Chad J. Peel, Geoffrey H. Howarth, Gelu Costin, Olivier Alard, Stephen Foley   +4 more
doaj   +1 more source

Plume‐Modified Lithosphere Mantle Controlled the Cenozoic Sediment Thickness in the Tarim Basin

Geophysical Research Letters
The Cenozoic sediments are very thick in the southwest Tarim Basin and very thin in the northwest, but what controls these variations is unclear.
Xiao Xiang, Hanlin Chen, Lin Chen, Xi Xu, Xiubin Lin, Zhong Li, Zhiyong Yan   +6 more
doaj   +1 more source

The Influence of Rotation on the Preservation of Heterogeneities in Magma Oceans

Geochemistry, Geophysics, Geosystems
Understanding the composition of lavas erupted at the surface of the Earth is key to reconstruct the long‐term history of our planet. Recent geochemical analyses of ocean island basalt samples indicate the preservation of ancient mantle heterogeneities ...
B. Thomas, H. Samuel, C. G. Farnetani, J. Aubert, C. Chauvel   +4 more
doaj   +1 more source

Lengthscales of Mantle Volatile Heterogeneity [PDF]

Goldschmidt Abstracts, 2020
Simon Matthews, Oliver Shorttle, John Maclennan, John F. Rudge, Bramley Murton   +4 more
openaire   +1 more source

Distinct Hadean Mantle Sources of Felsic and Mafic Terranes Juxtaposed in the Paleoarchean

Geochemistry, Geophysics, Geosystems
The short‐lived radionuclide system 146Sm‐142Nd can provide direct information about geological differentiation events in the terrestrial Hadean (>4.0 Ga) mantle.
Arathy Ravindran, Bradley J. Peters, Klaus Mezger, Eric Hasenstab‐Dübeler, Maya J. M., Maria Schönbächler   +5 more
doaj   +1 more source

Spreading modes at slow-spreading ridges shifted by mantle heterogeneity of the asthenosphere. [PDF]

Natl Sci Rev
Zhang WQ, Liu CZ, Xu M, Liu B, Lissenberg CJ, Dick HJB.   +5 more
europepmc   +1 more source