Results 61 to 70 of about 603 (179)

The role of continental subduction in mantle metasomatism and carbon recycling revealed by melt inclusions in UHP eclogites. [PDF]

Sci Adv, 2023
Borghini A, Nicoli G, Ferrero S, O'Brien PJ, Laurent O, Remusat L, Borghini G, Milani S.   +7 more
europepmc   +1 more source

First Identification of Mafic Igneous Enclaves in Miocene Lavas of Southern Tibet With Implications for Indian Continental Subduction

Geophysical Research Letters, 2018
The history of Indian continental subduction beneath Asian plate remains unclear. Miocene ultrapotassic rocks in southern Tibet, with extremely enriched isotopes, have often been used to trace mantle metasomatism and geodynamic processes associated with ...
Lu‐Lu Hao, Qiang Wang, Derek A. Wyman, Yue Qi, Lin Ma, Fang Huang, Le Zhang, Xiao Ping Xia, Quan Ou   +8 more
doaj   +1 more source

Sub-continental lithospheric mantle beneath the Adamawa volcanic area (Cameroon Volcanic Line): inference from lavas and hosted mantle xenoliths from Bini Warack, NE-Ngaoundéré, Cameroon (Central Africa)

BSGF - Earth Sciences Bulletin
The sub-continental lithospheric mantle (SCLM) beneath the Cameroon Volcanic Line (CVL) is vertically and laterally heterogeneous, consisting of a complex mixing of DMM, HIMU, and EM1, affected by modal or cryptic metasomatism, depending on the area. The
Mbassa Benoît Joseph, Vanderhaeghe Olivier, Grégoire Michel, Benoît Mathieu, Itiga Zenon, Ngwa Neh Caroline, Kamgang Pierre   +6 more
doaj   +1 more source

Long‐Term Radiogenic Heating by Abortively Erupted Basalts Triggers 120 Ma Lunar Volcanism

Geophysical Research Letters
The mantle source and formation mechanism of the recently discovered ∼120 Ma lunar volcanic glass beads (VGBs) in Chang'e‐5 samples remain elusive. By systematically comparing the compositions of ∼120 Ma VGBs with those of ancient Apollo VGBs, we propose
Qian W. L. Zhang, Yi Chen, Bin Su, Jia‐Hui Liu, Qiu‐Li Li, Xian‐Hua Li   +5 more
doaj   +1 more source

Links between the Archean hydrosphere and Earth’s interior

Nature Communications
Earth’s long-term habitability depends on cycling of surface volatiles into and out of the mantle, yet when this cycling began and how the early hydrosphere became connected to Earth’s interior remain debated.
Zheng-Yu Long, Frédéric Moynier, Igor S. Puchtel, Yiheng Li, Tu-Han Luu, Jun Deng, Kun-Feng Qiu   +6 more
doaj   +1 more source

Quantitative mapping of the oxidative effects of mantle metasomatism

Geology, 2013
The oxidation state of Fe in garnets in a garnet peridotite xenolith from the Wesselton kimberlite (South Africa) was quantitatively mapped using X-ray absorption near edge structure (XANES) spectroscopy. Maps of Fe3+/ΣFe were produced by recording the fluorescence intensity at discrete energies rather than recording the full spectrum at each point ...
Berry, Andrew John, Yaxley, Gregory, Hanger, Brendan, Woodland, Alan, de Jonge, Martin, Howard, Daryl, Paterson, David, Kamenetsky, Vadim S   +7 more
openaire   +2 more sources

Metasomatism and Melting of Cordilleran Lithosphere Resulting From Sediment Relamination During Shallow Subduction

Geochemistry, Geophysics, Geosystems
Mantle xenoliths recovered from the modern backarc region of the northern Altiplano Plateau record metasomatism by slab‐derived silicic melts, and a suite of Quaternary volcanics suggest that melting of accreted crustal material has persisted since ...
C. D. Hiett, D. L. Newell, J. W. Shervais   +2 more
doaj   +1 more source

Lithospheric stability and recycling linked to ancient metasomatic processes

Communications Earth & Environment
The melt-assisted destruction of thick continental lithosphere is a thermodynamically intensive process that requires a chemically altered lithosphere.
Shelby Bowden, Tanya Furman, Mansour Salem Alhumimidi, Emma Stolinas   +3 more
doaj   +1 more source

Water in Earth's mantle : Metasomatism and melting

This thesis investigates the role of water in generating some geochemical and geophysical features in the upper mantle that are thought to be related to melting and metasomatism. Dehydration melting of amphibole has been proposed as a possible mechanism causing the lithosphere-asthenosphere boundary.
openaire   +3 more sources

Mélange dehydration and melting beneath South Sandwich Islands arc

Nature Communications
Mechanisms regulating material transfer from subducted slabs to arc magmas remain debated, centered on metasomatized mantle wedge interactions versus mélange mobilization at the slab-mantle interface.
Yunchao Shu, Sune G. Nielsen, Veronique Le Roux, Danielle Santiago Ramos, Jerzy Blusztajn, Maureen Auro, Phil T. Leat, Tristan J. Horner   +7 more
doaj   +1 more source