Results 41 to 50 of about 154 (139)
Major element geochemistry of the granitic rocks [PDF]
Bulletin of the Geological Society of Finland, 1977 Chemical data on major components in 195 granitic rocks, mainly- Finnish, were extracted from the geological literature, stored in a data processing system and treated statistically.
R. Piispanen
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Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.Abstract The 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 crystal mushes has gained wide acceptance.
Wang Li +5 more
wiley +1 more source
A specialized topaz-bearing rapakivi granite and associated mineralized greisen in the Ahvenisto complex, SE Finland [PDF]
Bulletin of the Geological Society of Finland, 1991 The Ahvenisto rapakivi complex is a satellite northwest of the large Wiborg rapakivi batholith in Southeastern Finland. The rapakivi rocks are surrounded by rapakivi-age gabbros, anorthosites, monzodiorites and diabases.
P. Edén
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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
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Geosciences, 2022 This investigation examines the contemporary documentation of a sequence of low-magnitude earthquakes at the fringes of the Kingdom of Sweden, today Southeastern Finland, in 1751–1752.
Päivi B. Mäntyniemi
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Вісник Київського національного університету імені Тараса Шевченка. Серія Геологія, 2018 Preliminary geochemical dataset for the granitoids (rapakivi, granite-porphyries, veined granites) of Korosten anorthosite-rapakivi granite pluton (Ukrainian Shield) was studied. The data set includes the results of all major and selected trace elements
S. Shnyukov +5 more
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Brazilian Journal of Geology, 2018 : The Itatiaia Alkaline Massif comprises some of the largest meso-cenozoic alkaline igneous occurrences in Brazil, covering over 215 km2 between the states of Minas Gerais and Rio de Janeiro. It appears as an elongated, 30-km long and 4.5-11.5-km wide SE-
Pedro Augusto da Silva Rosa +1 more
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Geologica Acta, 2007 Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite.
M.K. Azer
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Indoor radon in houses built on gravel and sand deposits in southern Finland [PDF]
Bulletin of the Geological Society of Finland, 1993 Studies by the Finnish Centre for Radiation and Nuclear Safety (STUK) have shown that, in Finland, indoor radon concentrations are almost twice as high in houses built on sand or gravel as in houses built on other soil types. The aim of this study was to
K.-L. Hutri, I. Mäkeläinen
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Journal of the Geological Survey of Brazil, 2019 The study of granite rocks is important in order to understand chemical evolution of the continental crust. Their isotopic composition provides information on their magmatic sources, whether being mantle, crust or a mixture of both.
Beatriz Pereira Debowski +4 more
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