Results 101 to 110 of about 10,059 (219)
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.
core +1 more source
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
Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks [PDF]
, 2001 This chapter summarizes the oxygen isotope geochemistry of terrestrial basalts and their mantle sources, including the conceptual framework for interpreting such data and the phenomenology of known variations.
Eiler, John M.
core
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
The Melting of Carbonated Pelites from 70 to 700 km Depth [PDF]
, 2017 Phase assemblages, melting relations and melt compositions of a dry carbonated pelite (DG2) and a carbonated pelite with 1·1 wt % H2O (AM) have been experimentally investigated at 5·5-23·5 GPa and 1070-1550°C.
Grassi, Daniele, Schmidt, Max W.
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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
core
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.
core
Slab melting boosts the mantle wedge contribution to Li-rich magmas
Scientific ReportsThe lithium cycling in the supra-subduction mantle wedge is crucial for understanding the generation of Li-rich magmas that may potentially source ore deposition in continental arcs.
Erwin Schettino +9 more
doaj +1 more source
Записки Горного институтаThe article presents the results of a comprehensive study of diamondiferous lherzolite from the V.Grib kimberlite pipe. The composition of rock-forming minerals (olivine, orthopyroxene, Cr-diopside, Cr-pyrope) in terms of major elements mainly ...
Elena V. Agasheva +2 more
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