The Siipyy granite — a new rapakivi occurrence in Finland [PDF]
Bulletin of the Geological Society of Finland, 1989 H. Idman
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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 +5 more
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Formation of Rapakivi Textures in Granite of the Deer Isle Pluton, Maine [PDF]
, 2007 Ovoid K-feldspar mantled by Na-feldspar is called rapakivi. Rapakivi may form either by (1) decompression during ascent of felsic magma through the crust to a shallow magma chamber or by (2) mixing of mafic- and felsic-magma within a magma chamber.
Kaiser, Jason
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REE-bearing minerals in the Rapakavi Grante, Southern Finland
Open Geosciences, 2015 The studied rock samples belong to the classic1615–1645 Ma Wiborg Rapakivi granite terrane of southeasternFinland. Geochemical studies show that the rapakivigranites and associated rocks form metaluminousto peraluminous A-type granites and plot in the ...
Al-Ani Thair
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Hybridization in the subvolcanic Jaala-Iitti complex and its petrogenetic relation to rapakivi granites and associated mafic rocks of southeastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1995 The 1630 Ma Jaala-Iitti complex is an example of bimodal rapakivi granite magmatism in which the interaction of granite and diabase magmas have led locally to hybridization.
P.T. Salonsaari
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Tectonics, Volume 45, Issue 9, September 2026.Abstract The Fennoscandian Shield potentially hosts the longest continuous habitable conditions for Earth's deep biosphere. Billion‐year equilibrium freeboard conditions of cratons and the longevity of deep biosphere microbial communities are directly related through the thermal histories of rocks that host these communities.
Josh Isaacs +4 more
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Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism [PDF]
, 2021 Paleomagnetic studies have been performed on five rapakivi related complexes in Sweden and Finland. Poles of varying quality have been defined and the majority of the similar to 1640-1497 Ma poles are clustering on low latitudinal positions. By combining
Elming, Sten-åke, +11 more
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Using Laser Ablation ICP-MS to Constrain the Origin of the Rapakivi Texture of the Deer Isle Pluton, Maine [PDF]
, 2008 An Ovoid K-feldspar mantled by Na-feldspar is called rapakivi. Rapakivi may form either by (1) decompression during ascent of felsic magma through the crust to a shallow magma chamber or by (2) mixing of mafic- and felsic-magma within a magma chamber. We
Kaiser, Jason F.
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Remanent magnetization of two intrusive bodies in southeastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1978 Direction of natural remanent magnetization (NRM) was measured for a diabase from the intrusive contact of rapakivi granite (1650 Ma) and for a granodiorite intrusion (1810 Ma).
K.J. Neuvonen
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Geoheritage Meaning of Artificial Objects: Reporting Two New Examples from Russia
Heritage, 2021 Geoheritage is not necessarily linked genetically to “purely” geological processes. Investigations in two urban areas of Russia allowed us to find essentially artificial objects demonstrating certain geological uniqueness.
Anna V. Mikhailenko +2 more
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