Results 91 to 100 of about 10,594 (229)
Compressibility of 2M1 muscovite-phlogopite series minerals
Journal of Molecular Modeling, 2019 Muscovite (Ms) and phlogopite (Phl) belong to the 2:1 dioctahedral and trioctahedral layer silicates, respectively, and are the end members of Ms-Phl series minerals. This series was studied in the 2M1 polytype and modeled by the substitution of three Mg2+ cations in the Phl octahedral sites by two Al3+ and one vacancy, increasing the substitution up ...
Alfonso Hernández-Laguna +8 more
openaire +3 more sources
La chloritisation supergène zincifère des phlogopites de Canoas (PR, Brésil) [PDF]
, 1995 Dans l'altération superficielle de la mine de Pb-Zn-Ba de Canoas, les chlorites apparaissent en pseudomorphose des phlogopites avec un faciès et une composition tout à fait particuliers et sont très fortement zincifères (de 15 à 20% ZnO).
Blot, Alain +2 more
core
MineralogiaAn unusual phlogopite-amphibole-plagioclase-bearing websterite xenolith has been sampled in an alkali basaltic pyrolastite from Guinadji volcano, SE Ngaoundéré, Adamawa plateau, northern Cameroon, eastern extension of the continental sector of the ...
Kagarabi Paterne Mulimbi +4 more
doaj +1 more source
Geochimica Brasiliensis, 2020 Geochemical and petrological characteristics of a lamprophyre dyke at Kalagalla intruded into the auriferous schistose rocks of the Ramagiri-Penakacherla Schist Belt, Anantapur district, Andhra Pradesh, India are presented here. The Kalagalla lamprophyre
Rameshchandra Phani Pothuri +3 more
doaj +1 more source
The Compositional Evolution of the Phyllosilicates in the Lateritic Profile of the Catalão I Ultramafic Alkaline-carbonatitic Complex (GO) [PDF]
Geologia USP. Série Científica, 2010 The compositional evolution of the phyllosilicates in the lateritic profile of the Catalão I ultramafic alkaline-carbonatiticcomplex (GO) is proposed in this work based on petrographic and X-ray diffraction analysis, as well as, chemical ...
Rogério Guitarrari Azzone +1 more
doaj
Experimental Studies for the Detection of Protein in Trace Amounts Quarterly Status Report, 1 Mar. - 31 May 1965 [PDF]
Methods for separating inorganic compounds from organic materials in investigation of trace proteins in ...
Albert, J. D. +2 more
core +1 more source
Revision of Scheumann’s classification of melilitic lamprophyres and related melilitic rocks in light of new analytical data [PDF]
, 2014 Dykes of the Late Cretaceous to Early Tertiary (79.5 ± 3.5 to 60.7 ± 2.4 Ma) melilitic rock series of the Osečná Com- plex and the Devil’s Walls dyke swarm, including ultramafic lamprophyres – polzenites – of Scheumann (1913) occur dispersed in the ...
ACKERMAN, L. +4 more
core +1 more source
Geophysical Research LettersMetasomatized mantle xenoliths containing hydrous minerals, such as amphiboles, serpentine, and phlogopite, likely represent the potential mineralogical compositions of the metasomatized upper mantle, where low seismic velocities are commonly observed ...
Wen‐Yi Zhou +5 more
doaj +1 more source
The effect of H_2O and CO_2 on planetary mantles [PDF]
, 1978 The solidus for peridotite-H_2O-CO_2 is a divariant surface traversed by univariant lines that locate the intersections of subsolidus divariant surfaces for carbonation or hydration reactions occurring in the presence of H_2O-CO_2 mixtures.
Wyllie, Peter J.
core
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