Results 91 to 100 of about 10,059 (219)

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

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series [PDF]

, 2007
The ophiolitic rocks of the easternmost Penninic unit, the Kőszeg-Rechnitz series, were analyzed for their H, C and O stable isotope compositions. Serpentinite, gabbro, blueschist, talc deposits, ophicarbonates, as well as calcite and inclusion fluids ...
Demény, Attila, Koller, Friedrich, Vennemann, Torsten W.   +2 more
core   +1 more source

Crystallization and Breakdown of Metasomatic Phases in Graphite-bearing Peridotite Xenoliths from Marsabit (Kenya) [PDF]

, 2017
Mantle-derived xenoliths from the Marsabit shield volcano (eastern flank of the Kenya rift) include porphyroclastic spinel peridotites characterized by variable styles of metasomatism.
Kaeser, Benjamin, Kalt, Angelika, Pettke, Thomas   +2 more
core  

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

Neoproterozoic subduction along the Ailaoshan zone, South China : geochronological and geochemical evidence from amphibolite [PDF]

, 2014
This study was supported by China Natural Science Foundation (41190073 and 41372198), National Basic Research Program of China (2014CB440901) and Natural Environment Research Council (grant NE/J021822/1).Lenses of amphibolites occur along the Ailaoshan ...
Cai, Yongfeng, Cawood, Peter A., Fan, Weiming, Liu, Huichuan, Wang, Yuejun, Xing, Xiaowan, Zhang, Yuzhi   +6 more
core   +1 more source

Evolution of the Lithospheric Mantle beneath the Marsabit Volcanic Field (Northern Kenya): Constraints from Textural, P-T and Geochemical Studies on Xenoliths [PDF]

, 2017
Xenoliths hosted by Quaternary basanites and alkali basalts from Marsabit (northern Kenya) represent fragments of Proterozoic lithospheric mantle thinned and chemically modified during rifting in the Mesozoic (Anza Graben) and in the Tertiary-Quaternary (
KAESER, BENJAMIN, KALT, ANGELIKA, PETTKE, THOMAS   +2 more
core  

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

Petrochemical and petrophysical characterization of the lower crust and the Moho beneath the West African Craton, based on Xenoliths from Kimberlites [PDF]

Additional evidence to the composition of the lower crust and uppermost mantle was presented in the form of xenolith data. Xenoliths from the 2.7-Ga West African Craton indicate that the Moho beneath this shield is a chemically and physically gradational
Haggerty, Stephen E., Toft, Paul B.
core   +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