Results 41 to 50 of about 479 (172)
Comptes Rendus. Géoscience, 2021 Three of the largest granite porphyries of northern Portugal were studied to improve current knowledge on the regional felsic vein hypabyssal magmatism.
Oliveira, António João Teixeira +2 more
doaj +1 more source
RAPAKIVI MAGMATISM IN THE MIDDLE INIRIDA BASIN, GUAINÍA DEPARMENT, COLOMBIA
, 2022 In eastern Colombia, the crystalline basement is intruded by several anorogenic granites of Mesoproterozoic age. One of these anorogenic granitic intrusions outcrops in the area of the indigenous Matraca and Danta communities, at the middle ...
Frantz, José Carlos +5 more
core +2 more sources
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.
core +1 more source
Some progress on understanding the Phanerozoic granitoids in China
China Geology, 2018 : There are large volumes of the Phanerozoic granitoid rocks in China and neighboring areas. In recent years, numerous new and precise U-Pb zircon ages have been published for these granitoids, and define many important magmatic events, such as ca.
Tao Wang +8 more
doaj +1 more source
Nature secondary quartzites of the island Bol’shoy Tyuters (Gulf of the Finland, Russia)
Литосфера, 2017 Territory Baltic shield is well understood and the identification of innovative geological formations rare stroke of luck. Thanks to the Russian Geographical Society in the summer of 2015 an integrated expedition to study the nature of the little-known ...
Evgenii N. Terekhov +5 more
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
Changes of Granite Rapakivi under the Biofouling Influence
, 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.
Dmitry Yu. Vlasov +5 more
openaire +2 more sources
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