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• W2016504808 abstract "Research Article| May 01, 2014 Impact spherules from Karelia, Russia: Possible ejecta from the 2.02 Ga Vredefort impact event Matthew S. Huber; Matthew S. Huber * 1Department of Lithospheric Research, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria *Current address: Earth System Science, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium. Search for other works by this author on: GSW Google Scholar Alenka E. Črne; Alenka E. Črne 2Geological Survey of Norway, Postboks 6315 Sluppen, N-7491 Trondheim, Norway Search for other works by this author on: GSW Google Scholar Iain McDonald; Iain McDonald 3Cardiff University School of Earth and Ocean Sciences, Cardiff CF10 3AT, UK Search for other works by this author on: GSW Google Scholar Lutz Hecht; Lutz Hecht 4Museum für Naturkunde Berlin, Invalidenstrasse 43, 10115 Berlin, Germany Search for other works by this author on: GSW Google Scholar Victor A. Melezhik; Victor A. Melezhik 2Geological Survey of Norway, Postboks 6315 Sluppen, N-7491 Trondheim, Norway Search for other works by this author on: GSW Google Scholar Christian Koeberl Christian Koeberl 1Department of Lithospheric Research, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria5Natural History Museum, Burgring 7, 1010 Vienna, Austria Search for other works by this author on: GSW Google Scholar Author and Article Information Matthew S. Huber * 1Department of Lithospheric Research, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria Alenka E. Črne 2Geological Survey of Norway, Postboks 6315 Sluppen, N-7491 Trondheim, Norway Iain McDonald 3Cardiff University School of Earth and Ocean Sciences, Cardiff CF10 3AT, UK Lutz Hecht 4Museum für Naturkunde Berlin, Invalidenstrasse 43, 10115 Berlin, Germany Victor A. Melezhik 2Geological Survey of Norway, Postboks 6315 Sluppen, N-7491 Trondheim, Norway Christian Koeberl 1Department of Lithospheric Research, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria5Natural History Museum, Burgring 7, 1010 Vienna, Austria *Current address: Earth System Science, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium. Publisher: Geological Society of America Received: 23 Oct 2013 Revision Received: 03 Feb 2014 Accepted: 04 Feb 2014 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2014 Geological Society of America Geology (2014) 42 (5): 375–378. https://doi.org/10.1130/G35231.1 Article history Received: 23 Oct 2013 Revision Received: 03 Feb 2014 Accepted: 04 Feb 2014 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Matthew S. Huber, Alenka E. Črne, Iain McDonald, Lutz Hecht, Victor A. Melezhik, Christian Koeberl; Impact spherules from Karelia, Russia: Possible ejecta from the 2.02 Ga Vredefort impact event. Geology 2014;; 42 (5): 375–378. doi: https://doi.org/10.1130/G35231.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Spherule beds of possible impact origin have been discovered in two drill cores in the Paleoproterozoic Zaonega Formation, Karelia, northwest Russia. Spherules are found within the dolomite matrix of in-situ brecciated sedimentary dolostones. Spherules are millimeter size and generally round, although teardrop and dumbbell morphologies are present. Spherules contain up to 0.75 ppb Ir, with a Ru/Ir of 2, indicating a mixing of target rocks with a minor chondritic component. The age of the Zaonega Formation is constrained between limits of 1.975 ± 0.024 Ga (Sm-Nd) and 1.980 ± 0.057 Ga (Pb-Pb), and 2.050 Ga (Re-Os), which brackets the age of the 2020 Ma Vredefort impact structure in South Africa, and suggests that the spherule beds could represent ejecta from that event. If the link is confirmed, the size of the spherules and thickness of the beds suggest that the distance from the impact site was <2500 km, thereby constraining the paleogeographic distance between the Fennoscandian Shield and Kaapvaal craton during the late Paleoproterozoic. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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• W2016504808 title "Impact spherules from Karelia, Russia: Possible ejecta from the 2.02 Ga Vredefort impact event" @default.
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