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- W2057201609 abstract "Research Article| March 01, 2003 Early Archean spherule beds: Chromium isotopes confirm origin through multiple impacts of projectiles of carbonaceous chondrite type Frank T. Kyte; Frank T. Kyte 1Center for Astrobiology, Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90095-1567, USA Search for other works by this author on: GSW Google Scholar Alex Shukolyukov; Alex Shukolyukov 2Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0212, USA Search for other works by this author on: GSW Google Scholar Günter W. Lugmair; Günter W. Lugmair 3Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0212, USA, and Max-Planck Institute for Chemistry, Cosmochemistry, P.O. 3060, 55020 Mainz, Germany Search for other works by this author on: GSW Google Scholar Donald R. Lowe; Donald R. Lowe 4Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Gary R. Byerly Gary R. Byerly 5Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803-4101, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Frank T. Kyte 1Center for Astrobiology, Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90095-1567, USA Alex Shukolyukov 2Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0212, USA Günter W. Lugmair 3Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0212, USA, and Max-Planck Institute for Chemistry, Cosmochemistry, P.O. 3060, 55020 Mainz, Germany Donald R. Lowe 4Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305, USA Gary R. Byerly 5Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803-4101, USA Publisher: Geological Society of America Received: 23 May 2002 Revision Received: 22 Oct 2002 Accepted: 23 Oct 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (3): 283–286. https://doi.org/10.1130/0091-7613(2003)031<0283:EASBCI>2.0.CO;2 Article history Received: 23 May 2002 Revision Received: 22 Oct 2002 Accepted: 23 Oct 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Frank T. Kyte, Alex Shukolyukov, Günter W. Lugmair, Donald R. Lowe, Gary R. Byerly; Early Archean spherule beds: Chromium isotopes confirm origin through multiple impacts of projectiles of carbonaceous chondrite type. Geology 2003;; 31 (3): 283–286. doi: https://doi.org/10.1130/0091-7613(2003)031<0283:EASBCI>2.0.CO;2 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 Three Early Archean spherule beds from Barberton, South Africa, have anomalous Cr isotope compositions in addition to large Ir anomalies, confirming the presence of meteoritic material with a composition similar to that in carbonaceous chondrites. The extraterrestrial components in beds S2, S3, and S4 are estimated to be ∼1%, 50%–60%, and 15%–30%, respectively. These beds are probably the distal, and possibly global, ejecta from major large-body impacts. These impacts were probably much larger than the Cretaceous-Tertiary event, and all occurred over an interval of ∼20 m.y., implying an impactor flux at 3.2 Ga that was more than an order of magnitude greater than the present flux. 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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- W2057201609 title "Early Archean spherule beds: Chromium isotopes confirm origin through multiple impacts of projectiles of carbonaceous chondrite type" @default.
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