Results 71 to 80 of about 338,697 (184)

From the Bottom Up: Calculating Mantle‐Derived Magma Flux Using Subduction Parameters and Petrologic Constraints at Oceanic Arcs

Geochemistry, Geophysics, Geosystems
Mantle‐derived magma flux has a first‐order control on long‐term volcanic productivity, volatile cycling, and crustal growth in convergent margins. However, the factors controlling it remain unclear.
A. E. Goltz, C. B. Till, A. J. R. Kent
doaj   +1 more source

Melting of old refractory mantle during subduction initiation of the western Pacific plate

Communications Earth & Environment
The source characteristics and melting mechanisms for forearc basalts formed during subduction initiation in the western Pacific plate remain unclear.
Hong-Yan Li, Chun Yang, Marguerite Godard, Jeffrey G. Ryan, Yi-Gang Xu   +4 more
doaj   +1 more source

MAGLAB: A computing platform connecting geophysical signatures to melting processes in Earth's mantle

, 2020
International audienceDecompression melting of the upper mantle produces magmas and volcanism at the Earth's surface. Experimental petrology demonstrates that the presence of CO2 and H2O enhances peridotite melting anywhere within the upper mantle down ...
Tappe, Sebastian, Aulbach, Sonja, Gardés, Emmanuel, Sifré, David, Gaillard, Fabrice, Le Trong, Emmanuel, Rogerie, Grégory, Massuyeau, Malcolm   +7 more
core   +1 more source

Sr-Nd-Pb-Hf isotope results from ODP Leg 187: Evidence for mantle dynamics of the Australian-Antarctic Discordance and origin of the Indian MORB source [PDF]

, 2002
New high precision PIMMS Hf and Pb isotope data for 14–28 Ma basalts recovered during ODP Leg 187 are compared with zero-age dredge samples from the Australian-Antarctic Discordance (AAD).
Barry, Tiffany Louise, Langmuir, C., Christie, D. M., David M. Christie, Barry, T. L., Pearce, J. A., Pamela D. Kempton, Pearce, Julian A., J. Godfrey Fitton, Tiffany L. Barry, Charles Langmuir, Langmuir, Charles, Julian A. Pearce, Kempton, Pamela D., Fitton, J. G., Kempton, P. D., Fitton, J. Godfrey, Christie, David M.   +17 more
core   +1 more source

Variable Upper Mantle Geochemical Processes Constrained From Independent Component Analysis of the Fizh Massif, Northern Oman Ophiolite

Geochemistry, Geophysics, Geosystems
We statistically analyzed the whole‐rock compositions of peridotites in the Oman ophiolite using a multivariate statistical technique called independent component analysis (ICA) to better understand the processes within the ophiolitic mantle section that
Yuto Miki, Eiichi Takazawa, Kenta Ueki, Tatsu Kuwatani   +3 more
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

A Rare Glimpse of Paleoproterozoic Sub‐Arc Mantle: The Ussuit Peridotite, West Greenland

Geochemistry, Geophysics, Geosystems
Mantle residues beneath Archean cratonic nuclei have been extensively studied, whereas less attention has been given to the mantle lithosphere beneath Proterozoic mobile belts that link these nuclei.
T. McIntyre, P. Waterton, L. Li, B. Gong, X. Zha, K. Szilas, D. G. Pearson   +6 more
doaj   +1 more source

Low-degree mantle melting controls the deep seismicity and explosive volcanism of the Gakkel Ridge. [PDF]

Nat Commun, 2022
Koulakov I, Schlindwein V, Liu M, Gerya T, Jakovlev A, Ivanov A.   +5 more
europepmc   +1 more source

Time constraints on the formation of lithospheric mantle beneath cratons: a re-Os isotope and platinum group element study of peridotite xenoliths from northern Canada and Lesotho, [PDF]

, 2001
Understanding the generation and evolution of cratonic lithospheric keels requires detailed knowledge of their age, timescale of formation, and the relationship between the crust and mantle part of the lithosphere.
Irvine, Gordon James
core  

Lithosphere Modification Beneath the North China Craton: Geochemical Constraints of Water Contents from the Damaping Peridotite Xenoliths

Crystals
The water contents and geochemical evidence of nominally anhydrous minerals in peridotite xenoliths provide critical insights into lithospheric mantle features, offering a deep understanding of cratonic destruction and mantle evolution processes ...
Baoyi Yang, Bo Xu, Yi Zhao, Hui Zhang
doaj   +1 more source