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.
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The importance of talc and chlorite "hybrid” rocks for volatile recycling through subduction zones; evidence from the high-pressure subduction mélange of New Caledonia [PDF]
, 2018 The transfer of fluid and trace elements from the slab to the mantle wedge cannot be adequately explained by simple models of slab devolatilization. The eclogite-facies mélange belt of northern New Caledonia represents previously subducted oceanic crust ...
Arculus, Richard +4 more
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Long‐Term Radiogenic Heating by Abortively Erupted Basalts Triggers 120 Ma Lunar Volcanism
Geophysical Research LettersThe 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 +5 more
doaj +1 more source
Patent mantle-metasomatism: Inferences based on experimental studies
Journal of Earth System Science, 1990 K, Na and Ca are the most common elements transported during mantle metasomatism and result in formation of phlogopite (K), amphibole (Na) and clinopyroxene (Ca) by various reactions. This review presents models for this type of metasomatism based on experiments on the pyrolite-K2CO3-H2O, pyrolite-Na2 CO3-H2O systems and on the pyrolite-CaCO3 system ...
Y Thibault, A D Edgar
openaire +2 more sources
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 +2 more
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Geochemistry, Geophysics, GeosystemsMantle 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 +2 more
doaj +1 more source
Entrained Macrocryst Minerals as a Key to the Source Region of Olivine Nephelinites: Humberg, Kaiserstuhl, Germany [PDF]
, 2017 Olivine nephelinites commonly contain macrocrysts of olivine and clinopyroxene. Some of these macrocrysts might represent fragments of the source region of the host magma transported to the Earth's surface.
Müntener, Othmar +3 more
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A mid-Archaean ophiolite complex, Barberton Mountain land [PDF]
New field observations and structurally restored geologic sections through the southern part of 3.5-3.6 Ga Barberton greenstone belt show that its mafic to ultramafic rocks form a pseudostratigraphy comparable to that of Phanerozoic ophiolites; this ...
Dewit, M. J., Hart, R., Hart, R.
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Workshop on Moon in Transition: Apollo 14, KREEP, and Evolved Lunar Rocks [PDF]
Lunar rocks provide material for analyzing lunar history and now new evaluation procedures are available for discovering new information from the Fra Mauro highlands rocks, which are different from any other lunar samples.
Taylor, G. J., Warren, P. H.
core +1 more source
Mantle magma-thermofluidodynamic and intracrustal granitoid-hydrothermal-metasomatic auriferous systems [PDF]
, 2007 Contents of typical models of formation of abyssal and intra-core ore-forming systems are discussed. As it has been already marked, the interaction between core and mantle ore-forming systems occurred at formation of large and unique golden-ore deposits.
Korobeynikov, A. F.
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