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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About the genesis of ovoidal K-feldspar porphyry and quartz in rapakivi granites and related rocks [PDF]
, 2017 A comparative study of structural peculiarities of ovoid K-feldspar porphyry and quartz of rapakivi granite of different arrays (Aland, Vyborg, Salmi batholith rapakivi of the Baltic shield and Bardiaush batholith rapakivi of the South Ural), and ...
Belyaev, Anatoly M.
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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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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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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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Geophysical Research Letters, Volume 51, Issue 18, 28 September 2024.Abstract The Chuanlinggou Formation in the northern North China preserves the world's earliest multicellular eukaryote microfossils. Here we present a high‐precision zircon U–Pb CA–ID–TIMS age of 1,641.7 ± 1.2 Ma for a tuff layer within the black shales of the Chuanlinggou Formation.
Shuan‐Hong Zhang +6 more
wiley +1 more source
Tectonic setting and origin of the Proterozoic rapakivi granites of southeastern Fennoscandia
, 1992 The 1·65–1·54 Ga rapakivi granites of southeastern Fennoscandia represent the silicic members of a bimodal magmatic association in which the mafic members are tholeiitic diabase dykes and minor gabbroic-anorthositic bodies.
Ilmari Haapala, O. Tapani Rämö
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Геофизический журнал, 2014 Strain-deformed state of the earth’s crust of northwestern and central parts of the Ukrainian Shield while jointing the terrains of Fennoscandia and Sarmatia and forming of the Korosten and the Korsun-Novomirgorod plutons of gabbro-anorthosites and ...
O.B. Gintov, S. V. Mychak
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