Results 111 to 120 of about 59,876 (275)
Chalcophile Element Constraints on the Sulfur Content of the Martian Mantle [PDF]
The sulfur content of the Martian mantle is critical to understanding volcanic volatiles supplied to the surface of Mars and possibly climate. In the absence of Martian mantle rocks, sulfur content of the mantle has been inferred from S contents of ...
Hewins, R. H. +5 more
core +1 more source
Геофизический журнал, 2013 Analysis of geological structure and the studies of composition of magmatic complexes of the Ingul block of the Ukrainian Shield makes possible to come to some conclusions on its deep structure during the period of 2,1-1,7 Ga.
O.V. Usenko
doaj +1 more source
Arc Magmas from Slab to Eruption: The Case of Kliuchevskoy Volcano [PDF]
, 2011 Arc magmas are generated by a number of mantle and crustal processes. Our multidisciplinary, long-term research is aimed at deciphering these processes for a single arc volcano, Kliuchevskoy volcano in Kamchatka. Some key results of the study follow:
Bindeman, I. +8 more
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Cr-spinel records metasomatism not petrogenesis of mantle rocks
Nature Communications, 2019 Chromian-spinel from mafic-ultramafic rocks is used as a reliable geotectonic and mantle melting indicator. Here, the authors argue that this only works partially – it can be used to assess information on mantle metasomatic processes but not petrogenesis.
Hamed Gamal El Dien +8 more
doaj +1 more source
Thermodynamic properties of Mg_2SiO_4 liquid at ultra-high pressures from shock measurements to 200 GPa on forsterite and wadsleyite [PDF]
, 2007 Polycrystalline samples of Mg_2SiO_4 forsterite and wadsleyite were synthesized and then dynamically loaded to pressures of 39–200 GPa. Differences in initial density and internal energy between these two phases lead to distinct Hugoniots, each ...
Ahrens, Thomas J. +2 more
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Trace element geochemistry of peridotites from the Izu-Bonin-Mariana Forearc, Leg 125
, 1992 Trace element analyses (first-series transition elements, Ti, Rb, Sr, Zr, Y, Nb, and REE) were carried out on whole rocks and minerals from 10 peridotite samples from both Conical Seamount in the Mariana forearc and Torishima Forearc Seamount in the Izu ...
Ingram, G. +4 more
core +1 more source
Geodynamic Models of Melt Generation and Extraction at Mid-Ocean Ridges [PDF]
Oceanography, 2012 It is widely accepted that plate divergence at mid-ocean ridges drives mantle flow, mantle melting, and the formation of new oceanic crust. However, many of the details of this process remain obscure because of the inaccessibility of the mantle to direct
Patricia M. Gregg +3 more
doaj
Geochemistry, Geophysics, Geosystems, 2011 The Southwest Indian Ridge is characterized by frequent outcrops of mantle rocks in a very slow spreading context. In situ measurements of trace element concentrations in pyroxenes of these rocks, and associated petrogenetic modeling, are reported ...
Monique Seyler +3 more
doaj +1 more source
Life on Mars? The physiological perspective
Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley +1 more source
Melting of carbonated pelites at 8-13GPa: generating K-rich carbonatites for mantle metasomatism [PDF]
, 2018 The melting behaviour of three carbonated pelites containing 0-1wt% water was studied at 8 and 13GPa, 900-1,850°C to define conditions of melting, melt compositions and melting reactions.
Grassi, Daniele, Schmidt, Max
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