Results 31 to 40 of about 24,088 (309)

Late Cretaceous Construction of the Mantle Lithosphere Beneath the Central California Coast Revealed by Crystal Knob Xenoliths

Geochemistry, Geophysics, Geosystems, 2018
The Pleistocene (1.65 Ma) Crystal Knob volcanic neck in the California Coast Ranges is an olivine‐plagioclase phyric basalt containing dunite and spinel peridotite xenoliths.
D. P. Quinn, J. B. Saleeby, M. N. Ducea, P. Luffi, P. D. Asimow   +4 more
doaj   +1 more source

3-D multiobservable probabilistic inversion for the compositional and thermal structure of the lithosphere and upper mantle: III. Thermochemical tomography in the Western-Central U.S. [PDF]

, 2016
Acknowledgments We are indebted to F. Darbyshire and J. von Hunen for useful comments on earlier versions of this work. This manuscript benefited from thorough and constructive reviews by W. Levandowski and an anonymous reviewer.
Aoki K., Biegler L., Coltorti M., Eggler D. H., Evans J. R., Gerya T., Kitanidis P. K., Quarteroni A., Turcotte D. L., Van Decar J. C., Winter J. D.   +10 more
core   +2 more sources

On the age of white anorthosite of the Novomirgorod massif of the Korsun-Novomirgorod pluton (the Ukrainian Shield)

Геофизический журнал, 2014
Xenolites of white anorthosites have been found in anorthosites of the main phase of the Novom-irgorod massif of the Korsun-Novomirgorod pluton (the Ukrainian Shield, the Ingul megablock).
E. E. Shestopalova, L.M. Stepanyuk, T. I. Dovbush, A. V. Kovtun   +3 more
doaj   +1 more source

Sheared peridotite xenolith from the V. Grib kimberlite pipe, Arkhangelsk Diamond Province, Russia: Texture, composition, and origin

, 2017
The petrography and mineral composition of a mantle-derived garnet peridotite xenolith from the V. Grib kimberlite pipe (Arkhangelsk Diamond Province, Russia) was studied.
A. Kargin, L. Sazonova, A. Nosova, V. Pervov, Elena Vladimirovna Minevrina, V. Khvostikov, Zh. P. Burmii   +6 more
semanticscholar   +1 more source

Mantle and Crustal Xenoliths in a Tephriphonolite From La Palma (Canary Islands): Implications for Phonolite Formation at Oceanic Island Volcanoes

Frontiers in Earth Science, 2022
The occurrence of mantle-derived peridotite xenoliths in phonolitic melts is a rare phenomenon, and is commonly ascribed to a mantle origin of the phonolite.
Andreas Klügel, Elmar Albers, Thor H. Hansteen   +2 more
doaj   +1 more source

Kyanite-bearing eclogite xenoliths from the Udachnaya kimberlite, Siberian craton, Russia [PDF]

BSGF - Earth Sciences Bulletin, 2017
Xenoliths brought up by kimberlite magmas are rare samples of otherwise inaccessible lithospheric mantle. Eclogite xenoliths are found in most cratons and commonly show a range of mineral and chemical compositions that can be used to better understand ...
Radu Ioana-Bogdana, Moine Bertrand, Ionov Dmitri, Korsakov Andrey, Golovin Alexander, Mikhailenko Denis, Cottin Jean-Yves   +6 more
doaj   +1 more source

Evolution of the volcanic plumbing systemof Alicudi (Aeolian Islands - Italy): evidence from fluid and melt inclusionsin quartz xenoliths

Annals of Geophysics, 2004
Quartz-rich xenoliths in lavas (basalts to andesites; 90-30 ka) from Alicudi contain abundant melt and fluid inclusions. Two generations of CO2-rich fluid inclusions are present in quartz-rich xenolith grains: early (Type I) inclusions related to partial
A. Peccerillo, V. Zanon, M. L. Frezzotti, R. Bonelli   +3 more
doaj   +1 more source

Conduit formation and crustal microxenolith entrainment in a basaltic fissure eruption: Observations from Thríhnúkagígur Volcano, Iceland

Volcanica, 2022
Thríhnúkagígur Volcano, Iceland, is a composite spatter cone and lava field characteristic of basaltic fissure eruptions. Lava drainback at the end of the eruption left ~60 m of evacuated conduit, and a 4 × 104 m3 cave formed by the erosion of ...
Michael R Hudak, Maureen D Feineman, Peter C LaFemina, Halldór Geirsson, Samuele Agostini   +4 more
doaj   +1 more source

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Abidin, M.S.Z., Codemard, C.A., Dupriez, P., Farrell, C., Jeong, Y., Ji, J., Maran, J.-N., Nilsson, J., Payne, D.N., Richardson, D.J., Sahu, J.K., Yoo, S.   +11 more
core   +2 more sources

Oxygen-isotope and trace element constraints on the origins of silica-rich melts in the subarc mantle [PDF]

, 2007
Peridotitic xenoliths in basaltic andesites from Batan island in the Luzon arc contain silica-rich (broadly dacitic) hydrous melt inclusions that were likely trapped when these rocks were within the upper mantle wedge underlying the arc.
Eiler, J. M., Kita, N. T., Schiano, P., Stolper, E. M., Valley, J. W.   +4 more
core   +5 more sources