Results 61 to 70 of about 690 (184)
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
Journal of the Geological Survey of BrazilThis work reports how minerals at Redondão kimberlite pipe may be inferred through integrated interpretation of airborne gamma-ray spectrometry data and multispectral images derived from Advanced Spaceborne Thermal Emission and Reflection Radiometer ...
Adolfo Silva
doaj +1 more source
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
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
Barium feldspar from Pukkiharju base-metal mineralization, central Finland [PDF]
Bulletin of the Geological Society of Finland, 1987 R. Lahtinen, B. Johanson
doaj +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
Dielectric response of humid phlogopite
Bulletin of Materials Science, 1989 The dielectric response of phlogopite mica has been measured for frequency lying between 10 mHz and 10 kHz with humidity as a parameter. The measured complex capacitance shows a low frequency dispersion (LFD) at high humidities. A weak loss peak is also present at high frequencies and low humidity levels.
openaire +2 more sources
First evidence of lamprophyric magmatism within the Subbetic Zone (Southern Spain)
Geologica Acta, 2010 Two drillings carried out at Cerro Prieto (Province of Málaga), together with additional geophysical data, revealed the existence of an igneous body formed of rock-types previously unknown in the Subbetic zone.
E. PUGA +7 more
doaj