Fractionation of geochemical twins (Zr/Hf, Nb/Ta and Y/Ho) and HREE-enrichment during magmatic and metamorphic processes in peralkaline nepheline syenites from Norra Kärr (Sweden)
Sign Up to like & getrecommendations! Published in 2020 at "Lithos"
DOI: 10.1016/j.lithos.2020.105667
Abstract: Abstract The 1.49 Ga Norra Karr complex (Sweden) consists of deformed and metamorphosed peralkaline nepheline syenites that contain eudialyte-group minerals as the major host of high field strength elements and rare earth elements. Earlier studies revealed… read more here.
Keywords: nepheline syenites; magmatic metamorphic; group; eudialyte group ... See more keywords
Characterizing the behaviour of platinum group minerals in a grinding circuit
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DOI: 10.1016/j.mineng.2021.106863
Abstract: Abstract This paper introduces a methodology to determine the gravity-recoverable platinum group minerals (GRPGMs) of a stream, and behaviour of platinum group minerals (PGMs) in a ball mill-cyclone circuit. The GRPGM is determined by a… read more here.
Keywords: group minerals; methodology; platinum; circuit ... See more keywords
High-pressure vibrational spectra of humite-group minerals: Fluorine effect on thermodynamic properties and hydrogen bonds
Sign Up to like & getrecommendations! Published in 2021 at "Physics of the Earth and Planetary Interiors"
DOI: 10.1016/j.pepi.2021.106654
Abstract: Abstract The humite-group minerals could be potential water carriers as the dehydration products of serpentine in subduction slabs. Fluorine is an important element incorporated into the crystal structures through the substitution mechanism of OH− = F−, and… read more here.
Keywords: group minerals; humite group; high pressure; thermodynamic properties ... See more keywords
Ophiolite-related associations of platinum-group minerals at Rudnaya, western Sayans and Miass, southern Urals, Russia
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DOI: 10.1180/mgm.2018.82
Abstract: ABSTRACT We describe similar assemblages of minerals found in two placers in Russia, both probably derived from an ophiolitic source. The first is located along the River Rudnaya in the western Sayan province, Krasnoyarskiy kray,… read more here.
Keywords: southern urals; group; platinum group; group minerals ... See more keywords
Microlite-group minerals: tracers of complex post-magmatic evolution in beryl–columbite granitic pegmatites, Maršíkov District, Bohemian Massif, Czech Republic
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DOI: 10.1180/mgm.2021.58
Abstract: Microlite-group minerals occur as common replacement products after primary and secondary columbite-group minerals (CGM) in albitised blocky K-feldspar and in coarse-grained, muscovite-rich units of the Schinderhübel I, Scheibengraben and Bienergraben beryl–columbite pegmatites in the Maršíkov… read more here.
Keywords: microlite group; group; post magmatic; magmatic evolution ... See more keywords
Extra-Framework Content in Sodalite-Group Minerals: Complexity and New Aspects of Its Study Using Infrared and Raman Spectroscopy
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DOI: 10.3390/min10040363
Abstract: Nine samples of carbonate-free sodalite-group minerals, including those with abnormally high contents of polysulfide groups, fluoride anion and carbon dioxide molecules as well as synthetic fluoraluminate sodalite-type compound Na8(Si7Al5O24)(AlF6)3–·5H2O, have been studied by means of… read more here.
Keywords: sodalite group; infrared raman; spectroscopy; sodalite ... See more keywords
Review on the Compositional Variation of Eudialyte-Group Minerals in the Ilímaussaq Complex (South Greenland)
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DOI: 10.3390/min10111011
Abstract: We review the compositional variation of eudialyte-group minerals (EGM) from the Ilimaussaq complex in South Greenland. Investigated samples cover all major rock units and associated pegmatites and aplites. The whole data set (>3000 analyses from… read more here.
Keywords: variation eudialyte; review compositional; complex south; eudialyte group ... See more keywords
Exploration for Platinum-Group Minerals in Till: A New Approach to the Recovery, Counting, Mineral Identification and Chemical Characterization
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DOI: 10.3390/min11030264
Abstract: The discovery of new mineral deposits contributes to the sustainable mineral industrial development, which is essential to satisfy global resource demands. The exploration for new mineral resources is challenging in Canada since its vast lands… read more here.
Keywords: group minerals; mineral; chemical; platinum ... See more keywords
Detrital platinum-group minerals and gold in placers of southeastern Samar Island, Philippines
Sign Up to like & getrecommendations! Published in 2017 at "Canadian Mineralogist"
DOI: 10.3749/canmin.1600048
Abstract: Abstract The present work provides a comprehensive description of the assemblage of detrital platinum-group minerals (PGM) and gold found in the Llorente river and its tributaries draining the area west of the town of Llorente… read more here.
Keywords: southeastern samar; detrital platinum; platinum group; gold ... See more keywords
Textural Features and Chemical Evolution in Ta-Nb Oxides: Implications for Deuteric Rare-Metal Mineralization in the Yichun Granite-Marginal Pegmatite, Southeastern China
Sign Up to like & getrecommendations! Published in 2018 at "Economic Geology"
DOI: 10.5382/econgeo.2018.4577
Abstract: The genesis of Ta-Nb oxides in granitoid environments and, in particular, the role of deuteric fluids in Ta-Nb ore formation remain controversial. Ta-Nb oxides in the Yichun deposit occur disseminated in a topaz lepidolite granite… read more here.
Keywords: topaz lepidolite; marginal pegmatite; group minerals; lepidolite granite ... See more keywords