Results 1 to 10 of about 876 (70)
Growth of the Archean sialic crust as revealed by zircon in the TTGs in eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 2021 U–Pb age determinations on zircon from granitoids in the Archean of eastern Finland were conducted using the SIMS, LA-ICP-MS and TIMS techniques, with an emphasis on low-HREE granitoids.
Pentti Hölttä +5 more
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Secular change of tectonic setting in the Archean Takanen greenstone belt, northeastern Karelia Province, Fennoscandian Shield [PDF]
Bulletin of the Geological Society of Finland, 2023 The target of this study is the Takanen greenstone belt (TGB), a small 11-km-long and east-west oriented supracrustal belt in the northern Lentua complex of the Western Karelia Subprovince (eastern Finland).
Ville Järvinen +6 more
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Some new insights into the geochronology of the Western Karelia Subprovince, Finnish Lapland [PDF]
Bulletin of the Geological Society of Finland, 2020 Archean terranes are generally poorly exposed and structurally complicated, making models of geological evolution difficult to establish. Because of pervasive metamorphism, strong deformation, and poorly exposed bedrock, the stratigraphy, geochronology ...
Johanna Tepsell +9 more
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Геофизический журнал, 2023 The aim of the study, the results of which are presented in this article, is to study changes in the composition of hydrothermal fluid ore systems of the early Precambrian on the example of gold and uranium ore deposits of the Ukrainian shield in ...
Yu.O. Fomin +5 more
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Constraints over the age of magmatism and subsequent deformation for the Neoarchean Kukkola Gneiss Complex, northern Fennoscandia [PDF]
Bulletin of the Geological Society of Finland, 2020 The Archean crust in northern Fennoscandia preserves a fragmentary geological record, making direct correlation among Archean domains challenging. This study presents two new zircon U-Pb age determinations from the Archean Kukkola Gneiss Complex (KGC ...
Pietari Skyttä +6 more
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Precambrian tsunamis in the light of the modern data
Известия высших учебных заведений: Геология и разведка, 2023 Background. In the geological history of the Earth, tsunami events attract particular research attention. Such events are assumed to have taken place already since the Precambrian period.
D. A. Ruban
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Shiyou shiyan dizhi, 2020 The physical properties, group composition, stable carbon isotope, and biomarker compound distribution characteristics of crude oil in the Archean buried hill were studied and compared with the geochemical characteristics of Paleogene crude oil, in order
Tingting ZHAO +5 more
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CARBONATES OF ORE DEPOSITS OF PRECAMBRIAN OF THE CENTRAL PART OF THE UKRAINIAN SHIELD
Геохімія техногенезу, 2020 The article presents the results of study of the isotopic composition of oxygen and carbon of carbonates in ore deposits of the Early Pre-cambrian of the Ukrainian Shield. The following objects were studied: 1. Iron ore formations of the Kryvyi Rih ultra-
Fomin Yu. +4 more
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Геодинамика и тектонофизика, 2020 The Archean metamorphism in the southwestern Siberian craton was confirmed by the studies of the Kitoy and Irkutsk blocks. However, the parameters of the metamorphism process are still poorly investigated.
V. P. Sukhorukov, V. B. Savel'eva
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BSGF - Earth Sciences Bulletin, 2023 The Sassandra-Cavally (SASCA) domain (SW Côte d’Ivoire) marks the transition between the Archean Kenema-Man craton and the Paleoproterozoic (Rhyacian) Baoule-Mossi domain.
Koffi Augustin Yao +9 more
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