Results 1 to 10 of about 2,854 (120)
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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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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Shale Heavy Metal Isotope Records of Low Environmental O2 Between Two Archean Oxidation Events
Frontiers in Earth Science, 2022 Evidence of molecular oxygen (O2) accumulation at Earth’s surface during the Archean (4.0–2.5 billion years ago, or Ga) seems to increase in its abundance and compelling nature toward the end of the eon, during the runup to the Great Oxidation Event. Yet,
Chadlin M. Ostrander +9 more
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Novel Microbial Groups Drive Productivity in an Archean Iron Formation
Frontiers in Microbiology, 2021 Deep subsurface environments are decoupled from Earth’s surface processes yet diverse, active, and abundant microbial communities thrive in these isolated environments.
Cody S. Sheik +13 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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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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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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