Results 1 to 10 of about 2,734 (234)
Wodginite as an indicator mineral of tantalum-bearing pegmatites and granites
Записки Горного института, 2023 In the composition of tantalum-niobates, the tin-bearing wodginite group minerals (WGM) were found: wod-ginite, titanowodginite, ferrowodginite, ferrotitanowodginite, lithiowodginite, tantalowodginite, “wolframowodginite”.
Viktor I. Alekseev
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Rare metal granites and related rocks of the Ukrainian shield [PDF]
Bulletin of the Geological Society of Finland, 1993 Two rare metal leucocratic granites, Perga and Kamennaya complexes, can be distinquished on the Ukrainian shield. The Perga complex consists of medium- and coarse-grained, mainly porphyric, biotite, riebeckite and aegirine granites, granite porphyries ...
K.Y. Esipchuk +2 more
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Geogaceta, 2022 Critical raw materials are essential for the development of our society. However, most shallow ores have already been exploited and only deep targets remain unexplored. This work aims to apply indirect geophysical techniques to the San Finx Sn-W deposit
Alberto Santamaría Barragán +6 more
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Frontiers in Earth Science, 2020 Archean-Proterozoic boundary represents a significant transitional phase in the Earth's history. Bastar Craton is one of the major Archean cratons in the Indian subcontinent with voluminous granites, supracrustal rocks, and tectonic belts.
Ajay Dev Asokan +4 more
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The occurrence of rare earth elements in some Finnish mires [PDF]
Bulletin of the Geological Society of Finland, 1995 The content of the more abundant rare earths (RE) (Y, La, Ce, Pr, Nd and Sm) in the ash of 399 peat samples from 26 Finnish mires was determined by X-ray fluorescence spectrometry.
I. Yliruokanen, S. Lehto
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Geochronology of the Suomenniemi rapakivi granite complex revisited: Implications of point-specific errors on zircon U-Pb and refined λ87 on whole-rock Rb-Sr [PDF]
Bulletin of the Geological Society of Finland, 2015 Multi-grain isotope dilution and secondary ion microprobe zircon U-Pb as well as wholerock Rb-Sr isotope dilution data on the late Paleoproterozoic Suomenniemi rapakivi granite complex (exposed on the northern flank of the Wiborg batholith in ...
O.T. Rämö, I. Mänttäri
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A specialized topaz-bearing rapakivi granite and associated mineralized greisen in the Ahvenisto complex, SE Finland [PDF]
Bulletin of the Geological Society of Finland, 1991 The Ahvenisto rapakivi complex is a satellite northwest of the large Wiborg rapakivi batholith in Southeastern Finland. The rapakivi rocks are surrounded by rapakivi-age gabbros, anorthosites, monzodiorites and diabases.
P. Edén
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Fluid inclusions in cavity quartz crystals in rapakivi from Luumäki, southeastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1991 Fluid inclusions in selected cavity quartz crystals in rapakivi granite from Luumäki, southeastern Finland, were studied by microthermometric methods.
M. Poutiainen
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Руды и металлы, 2022 The structural position, petrographic composition, petro- and geochemical features of amphibole-biotite, biotite and amblygonite-lepidolite granitoid of the study area are characterized.
Larisa G. Vdovina
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Distribution of rare earth elements in Ruska Poliana granites and accessory fluorites
Мінеральні ресурси України, 2019 Fluorite is one of the main concentrators of rare earth elements (REE) in the granites of the Ruska Polіana massif of the Korsun-Novomyrhorod pluton of the Ukrainian Shield. Despite its distribution in the granites of the massif, the geochemical features
O. M. Ponomarenko +4 more
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