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The Origin of Rapakivi Texture
Journal of Petrology, 199445124
Dempster, TJ, Jenkin, GRT, Rogers, G
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Rapakivi granite, anorthosite and charnockitic plutonism
Nature, 1978THE close association of massive anorthosite and charnockitic granitic rocks is well documented1. Rare earth element (REE) investigations2–4 have indicated that the massive charnockite (mangerite) associated with anorthosite is not comagmatic with it but represents a distinct magma fraction.
F. H. HUBBARD, J. E. WHITLEY
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One hundred years of rapakivi granite
Mineralogy and Petrology, 1995Rapakivi granites, recently redefined as A-type granites showing rapakivi texture at least in the larger batholiths, occur on all continents and presumably represent the most voluminous continental silicic intraplate magmatism on Earth. Most of the rapakivi granites are Proterozoic (mainly 1.0 to 1.7 Ga) but also Archean (2.8 Ga) and Phanerozoic (0.05 ...
O. T. R�m�, I. Haapala
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Special Publications, 2020
Rapakivi granites were in use during the Middle Ages in Finland. Their most spectacular use, however, was for structures built in St Petersburg between 1760 and 1917.
A. Bulakh +3 more
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Rapakivi granites were in use during the Middle Ages in Finland. Their most spectacular use, however, was for structures built in St Petersburg between 1760 and 1917.
A. Bulakh +3 more
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Mineralogy and Petrology, 1994
This paper deals with the chemical composition of biotites from rapakivi granites. For this purpose, 61 chemical analyses of biotites from composite anorthosite-rapakivi plutons in the Fennoscandian and Ukranian shields were used. Figurative points of the biotite composition were plotted on diagrams designed for biotites byFoster (1960),Winchell (1949)
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This paper deals with the chemical composition of biotites from rapakivi granites. For this purpose, 61 chemical analyses of biotites from composite anorthosite-rapakivi plutons in the Fennoscandian and Ukranian shields were used. Figurative points of the biotite composition were plotted on diagrams designed for biotites byFoster (1960),Winchell (1949)
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ГЕОЛОГИЯ И МИНЕРАЛЬНО-СЫРЬЕВЫЕ РЕСУРСЫ СЕВЕРО-ВОСТОКА РОССИИ 2024
New and previously published U-Pb data indicates that in the central part of the Tatarka-Ishimba suture zone of the Yenisei Ridge A-type granitoids including rapakivi granites and associating basic and intermediate rocks were emplaced 651-629 Ma, forming
Е. ВЕРНИКОВСКАЯ А +5 more
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New and previously published U-Pb data indicates that in the central part of the Tatarka-Ishimba suture zone of the Yenisei Ridge A-type granitoids including rapakivi granites and associating basic and intermediate rocks were emplaced 651-629 Ma, forming
Е. ВЕРНИКОВСКАЯ А +5 more
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2005
Publisher Summary The Paleoproterozoic Svecofennian bedrock of southern Finland formed during a multiphase convergence and collision of lithospheric plates ∼ 1900 Ma ago. The next event to strongly reshape the Finnish bedrock was the emplacement of the rapakivi granites-∼1600 Ma ago, when the Svecofennian mountain chain had already been eroded down ...
O.T. Rämö, I. Haapala
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Publisher Summary The Paleoproterozoic Svecofennian bedrock of southern Finland formed during a multiphase convergence and collision of lithospheric plates ∼ 1900 Ma ago. The next event to strongly reshape the Finnish bedrock was the emplacement of the rapakivi granites-∼1600 Ma ago, when the Svecofennian mountain chain had already been eroded down ...
O.T. Rämö, I. Haapala
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The pressure quench formation of rapakivi texture
Contributions to Mineralogy and Petrology, 1978Chemical and textural data for rapakivi granites are combined with experimentally determined phase equilibria to provide constraints on the growth of mantled feldspars by a pressure quench mechanism. In water saturated melts of granitic composition the mantled texture develops in response to a decrease in pressure of as little as 1–0.5 kbar.
Cherry, Michael E., Trembath, Lowell T.
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Canadian journal of earth sciences (Print), 2020
The Margaree pluton extends for >40 km along the axis of the Ganderian Aspy terrane of northern Cape Breton Island, Nova Scotia. The pluton consists mainly of coarse-grained megacrystic syenogranite, intruded by small bodies of medium-grained ...
G. Santos +3 more
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The Margaree pluton extends for >40 km along the axis of the Ganderian Aspy terrane of northern Cape Breton Island, Nova Scotia. The pluton consists mainly of coarse-grained megacrystic syenogranite, intruded by small bodies of medium-grained ...
G. Santos +3 more
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The Soca intrusion: a rapakivi granite of Uruguay
Journal of South American Earth Sciences, 1998Abstract The Soca granite, emplaced in the Rio de la Plata Craton, is located 65 km east of Montevideo. It is a homogeneous porphyritic leucogranite, with almost 75 km 2 of exposed area. Petrographically, the Soca granite is characterized by the occurrence of quartz, plagioclase and alkaline feldspar in two generations, ferrous pyroxene, mica ...
P. Oyhantçabal +3 more
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