Results 1 to 10 of about 85,736 (331)

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, Y.M. Sheremet, K.I. Sveshnikov   +2 more
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Tirekhtyakh, Arga-Ynnakh-Khai and Kester intrusive complexes based on the materials of GDP-200 on the territory of sheets Q-53-IX, X

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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Petrogenesis of the Kanker Granites From the Bastar Craton: Implications for Crustal Growth and Evolution During the Archean-Proterozoic Transition

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, R. Elangovan, Neeraj Vishwakarma, K. R. Hari, M. Ram Mohan   +4 more
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Age and isotopic fingerprints of some plutonic rocks in the Wiborg rapakivi granite batholith with special reference to the dark wiborgite of the Ristisaari Island [PDF]

Bulletin of the Geological Society of Finland, 2014
The mid-Proterozoic, locus classicus Wiborg rapakivi granite batholith of southeastern Finland and adjacent Russia comprises a varying, bimodal (silicic-basic) sequence of plutonic, subvolcanic, and volcanic rocks. At the current level of erosion silicic
O.T. Rämö, V. Turkki, I. Mänttäri, A. Heinonen, K. Larjamo, Y. Lahaye   +5 more
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Temporal and Hf isotope geochemical evolution of southern Finnish Lapland from 2.77 Ga to 1.76 Ga [PDF]

Bulletin of the Geological Society of Finland, 2012
The southern Finnish Lapland area in the central part of the Fennoscandian shield is a geologically complex zone comprising several Archean blocks and Paleoproterozoic supracrustal belts all of which are intruded by voluminous Paleoproterozoic granites ...
L.S. Lauri, T. Andersen, J. Räsänen, H. Juopperi   +3 more
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Silicic magmas in the Michoacán-Guanajuato Volcanic Field: an overview about plumbing systems, crustal storage and genesis processes

Revista Mexicana de Ciencias Geológicas, 2021
The origin of silicic rocks in the Michoacán-Guanajuato volcanic field (MGVF) has been understudied since the volcanic field attracted the attention of researchers. Using geochemical, petrological and structural data from the literature, here we propose
Giovanni Sosa-Ceballos, Mario Emmanuel Boijseauneau-López, Juan Daniel Pérez-Orozco, Gerardo Cifuentes-Nava, Xavier Bolós, Mathieu Perton, David Simón-Velázquez   +6 more
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Infra-supra structure relations of a microcline-granite dome in the Somero area, Svecofennides, SW Finland [PDF]

Bulletin of the Geological Society of Finland, 1989
Internal structure and deformational history of two granite domains with markedly distinct tectono-metamorphic evolutions occur in the Somero area, SW Finland.
H. Stel, R. Veenhof, J.M. Huizenga, M. Timmerman, J.M.H. Hartsink   +4 more
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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, O. V. Zaiats, A. I. Samchuk, I. A. Shvaika, L. I. Proskurka   +4 more
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Boron and Molybdenum Isotope Evidence for Source‐Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya

Geochemistry, Geophysics, Geosystems, 2023
The origins of Cenozoic granites in the Himalaya are key to understanding the evolution of the Himalayan orogen. However, it is unclear whether these granites represent primary melts, and the nature of their magma source is controversial.
Jing‐Jing Fan, Qiang Wang, Gang‐Jian Wei, Jie Li, Lin Ma, Xiu‐Zheng Zhang, Zi‐Qi Jiang, Jin‐Long Ma, Jin‐Sheng Zhou, Qi‐Wei Li, Zi‐Long Wang, Xiao Liu, Tong‐Yu Huang, Miao‐Yan Zhang   +13 more
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