Magmatic constraints on localization of natural stone deposits in the Vehmaa rapakivi granite batholith, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 2011 The 1580–1570 Ma old Vehmaa rapakivi granite batholith was studied with the aim to define the geological constraints for localization of natural stone deposits in the batholith.
O. Selonen +3 more
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Geochemistry, Geophysics, GeosystemsThe formation, storage, and evolution of granitic magmas are fundamental processes driving the growth of continental crust. While traditionally attributed to crystal fractionation in high‐melt fraction magma chambers, the model invoking low‐melt fraction
Wang Li +5 more
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Petrography and geochemistry of the topaz-bearing granite stocks in Artjärvi and Sääskjärvi, western margin of the Wiborg rapakivi granite batholith [PDF]
Bulletin of the Geological Society of Finland, 2002 The Artjärvi and Sääskjärvi granite stocks at the western margin of the Wiborg rapakivi batholith are multiphase rapakivi granite intrusions in which the most evolved phase is topaz-bearing granite.
S. Lukkari
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Rapakivi texture in porphyritic dikes within the Karavanke granitic massif (Slovenia) [PDF]
Bulletin of the Geological Society of Finland, 2002 The northern Karavanke Granitic Massif straddles the Slovenian–Austrian border. The investigated area lies in northern Slovenia, and extends from the western Slovenian–Austrian border to the east for about 30 km, with a maximum width of 2 km.
M. Dobnikar, T. Dolenec, G. Bellieni
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Boulder of orbicular rapakivi in Taivassalo, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1983 A boulder of an orbicular rapakivi was found in Taivassalo, close to the southern contact of the Vehmaa rapakivi area in southwestern Finland. Many features, e.g.
N. Edelman
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Changes of Granite Rapakivi under the Biofouling Influence
Geochemistry, 2021 Interdisciplinary study of granite rapakivi biofouling in the natural and anthropogenic environment (St. Petersburg, Vyborg, Southern Finland) was carried out. The biodiversity of microorganisms (cyanobacteria, micromycetes, and organotrophic bacteria) and various types of biofilms are characterized.
Yu., Vlasov, Dmitry +5 more
semanticscholar +5 more sources
Reduced rapakivi-type granites: The tholeiite connection
Geology, 1997 Reduced rapakivi-type granites are the most iron enriched and reduced (i.e., least oxidized) of the “anorogenic” granite association. The low oxygen fugacity and chemical composition of these granites severely limit their sources. In this paper we argue that reduced rapakivi-type granites and their eruptive equivalents, high-potassium fayalite ...
Carol D. Frost, B. Ronald Frost
semanticscholar +4 more sources
Geothermal EnergyAncient crystalline basement cratons are traditionally considered challenging geothermal targets due to their low heat flow, limited porosity, and low matrix permeability.
Nicklas Nordbäck +8 more
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Th-Rich Zircon from a Pegmatite Vein Hosted in the Wiborg Rapakivi Granite Massif [PDF]
Géosciences, 2023 Zircon from a pegmatite vein hosted in the rapakivi granites occurring in the Gubanov Intrusion of the Wiborg Massif was shown by the EPMA method to contain an anomalously high Th of 18.3 wt% ThO2 (about 161,000 ppm Th).
С. Г. Скублов +4 more
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Natural Experiment on the Extraction and Quenching of Rapakivi-like Magmas: Traces of Interaction with the Mafic Melts and Their Derivatives, Salmi Batholith (Karelia, Russia) [PDF]
Minerals, 2023 The origin of the anorthosite-rapakivi granite-bearing rock complexes was a topic of research for geologists for more than a century. Magmatic systems that produce these complexes were widely developed in the Precambrian and have no direct analogues in ...
А. А. Конышев
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