Results 81 to 90 of about 278,731 (238)
Geofísica Internacional, 1985 De acuerdo con los modelos generales para los arcos volcánicos relacionados con la subducción, las composiciones del magma se hacen progresivamente más ricas en K20 y los elementos incompatibles, a medida que aumentan la distancia desde la trinchera y el
J. F. Luhr, I. S. E. Carmichael
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Nature and origin of calc-alkaline lamprophyres: minettes, vogesites, kersantites and spessartites
, 1984 Calc-alkaline lamprophyres are porphyritic dyke-rocks, richer in amphibole, biotite, ultramark elements (Mg, Cr, Ni) and incompatible elements (K, F, P, Rb, Sr, Zn, Nb, Ba, REE, Th, U) than other rocks of comparable colour index (35–67) or % SiO2(46–57).
N. M. S. Rock
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The dynamics of alkaline phosphatase activity during operculum regeneration in the polychaete Pomatoceros lamarckii [PDF]
, 2014 RS is supported by a Carnegie Scholarship. Date of Acceptance: 20/06/2014Alkaline phosphatase enzymes are found throughout the living world and fulfil a variety of functions.
Ferrier, David Ellard Keith, Szabo, Reka
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, 2000 Two chemically and petrographically distinct intrusive bodies (a calc-alkaline trondhjemite and an alkaline quartz-syenite cut by granitic aplites) occur in the vicinity of Piranga (Minas Gerais State), near the southeastern border of the São Francisco ...
Evangelista, Hanna Jordt +2 more
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Petrology and geochemistry of the Meshi rocks, eastern margin of the Central Cameroon Shear Zone
Discover GeoscienceThe Meshi area is located at eastern margin of the Central Cameroon Shear zone. Its petrography and petrogenesis is up to date not well known compared to the central part of the Central Cameroon Shear Zone. It is made up of amphibolite and granites host.
Benjamin Ntiéche +7 more
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ChemElectroChem, Volume 13, Issue 19, 1 October 2026.Investigation of anolyte composition in IOR‐coupled hybrid electrolysis shows that anolyte composition dictates open‐circuit voltage and cell resistance rather than net activation overpotential. Lower I2/HI and higher HI/H2O ratios reduce cell voltage.
Ashwin Yashwanth +4 more
wiley +1 more source
, 1993 The Platanar volcanic center is dominated by a calc-alkaline, basalt-andesite-dacite-rhyolite magma series with unusual LREE enrichment. Adjacent and overlapping the calc-alkaline rocks are the most alkaline basalts found along the volcanic front of ...
Carr, M. J., Alvarado, G. E.
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Optical Basicity of Glasses: Review and Application in Nuclear Glass Formulation
International Journal of Applied Glass Science, Volume 17, Issue 4, October 2026.A self‐consistent set of optical basicity (OB) values was compiled and evaluated for 95 binary oxides using electronegativity, ionic–covalent, and optical‐property approaches, providing a robust basis for estimating the basicity of complex compounds and glasses.
John McCloy, John Bussey, Wyatt Kiff
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Journal of Economic Geology, 2014 Introduction The study area is a small part of the Urumieh-Dokhtar structural zone in the Markazi province, located in the northeastern part of the Farmahin, north of Arak (Hajian, 1970). The volcanic rocks studied from the area include andesite, dacite,
Reza Zarei Sahamieh, Sara Ebrahimi
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Zeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 14, 23 September 2026.The RE4Al13Pt9 series has been extended to RE = Y, La‐Nd, Sm, Gd‐Dy. The compounds have been investigated by X‐ray diffraction and magnetic susceptibility measurements. Of the RE4Al13Pt9 series, the RE = Ce, Pr, and Eu representatives were previously reported. In this work we extend the series to RE = Y, La‐Nd, Sm, Gd‐Dy.
Stefan Engel +3 more
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