Sequence of crystallisation of pegmatites: the Angola case [PDF]
, 2016 The Precambrian basement of Angola contains several pegmatite fields, although most of them have not been studied yet. Some of them include pegmatites devoid of rare elements, as those found close to Caxito, about 100 km ENE Luanda.
Alfonso Abella, María Pura +2 more
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Geology and geochemistry of the Redrock Granite and anorthosite xenoliths (Proterozoic) in the northern Burro Mountains, Grant County, New Mexico, USA [PDF]
, 2002 Mineral ages from the A-type granites and anorthosite xenoliths in the Redrock area in the northwestern Burro Mountains in southwestern New Mexico cluster around ~1220–1225 Ma and provide yet another example of bimodal igneous activity during this time ...
Ilmari Haapala +5 more
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The effect of F on the density of haplogranite melt [PDF]
, 1993 The densities and thermal expansivities of F-bearing haplogranitic glasses and liquids have been investigated using a combination of scanning calorimetry and dilatometry. F2O-1 reduces the density of haplogranitic liquids (at 750 °C) from 2.295 + 0.006 g/
Dingwell, Donald B. +2 more
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An Improved Method for Obtaining Small Pressed Powder Pellets for the Analysis by XRF [PDF]
, 2002 A rapid, very low cost of instrumentation and simple approach to specimen preparation for the analysis by X-ray fluorescence spectrometry is presented. This technique requires a few mg of powdered samples, which are compressed to produce pellets.
D`angelo, José Alejandro +3 more
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From mantle to critical zone : a review of large and giant sized deposits of the rare earth elements [PDF]
, 2016 MS, AF and FW acknowledge the support of the NERC SoS:RARE consortium grant (NE/M011267/1). D. Kavecsanszki acknowledges the support of a postgraduate fellowship from the College of Engineering, Mathematics and Physical Sciences at the University of ...
Finch, Adrian Anthony +5 more
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Structural caracterization of potassic feldspars from pegmatites around La Cocha, Villa Praga-Las Lagunas Group, Tilisarao-Renca subgroup and Concarán subgroup, San Luis, Argentina [PDF]
, 2016 Entre los 32º37’02" LS – 65º27’28" LO y 32º39’31" LS – 65º23’36" LO se encuentra un grupo de pegmatitas pertenecientes al Grupo Villa Praga-Las Lagunas, subgrupos Concarán y Tilisarao-Renca.
Lopez, Monica Graciela +2 more
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Fractional crystallization of high-K arc magmas: biotite- versus amphibole-dominated fractionation series in the Dariv Igneous Complex, Western Mongolia [PDF]
, 2014 Many studies have documented hydrous fractionation of calc-alkaline basalts producing tonalitic, granodioritic, and granitic melts, but the origin of more alkaline arc sequences dominated by high-K monzonitic suites has not been thoroughly investigated ...
Bucholz, Claire E. +3 more
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A comparative study of ree geochemistry in precambrian pegmatites and associated host rocks from western Oban Massif, Se – Nigeria [PDF]
, 2012 The area of study (Igbofia-Akwa Ibami-Iwuru) is located between Latitudes 5o20'N and 5o27'N, and Longitudes 8o09'E and 8o18'E, south-eastern Nigeria. The pegmatites of this area have been studied by several authors for several decades till now.
Ekwere, SJ, Igonor, EE, Oden, MI
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Occurrence and compositions of post-metamorphic alkali ～ highly potassic dykes intruded into metamorphic rocks on Lützow-Holm Complex, East Antarctica [PDF]
, 2016 第2回極域科学シンポジウム/第31回極域地学シンポジウム 11月17日（木） 国立極地研究所 ...
D.J.Du nkley +7 more
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Tectonic environments and rare metal mineralization in pegmatites of Komu Area, Southwestern Nigeria [PDF]
, 2010 The discrimination diagrams: Rb versus Nb +Y and Nb versus Y, and Th/Ta ratio combined with field observations and empirical information from the literature were used to infer the tectonic environments and sources of the rare metal mineralization in the ...
Adetunji, A, Ocan, OO
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