Research Article| May 01, 2003 Paleointensity of the early geodynamo (2.45 Ga) as recorded in Karelia: A single-crystal approach A.V. Smirnov; A.V. Smirnov 1Department of Earth and Environmental Sciences, University of Rochester, Rochester, New York 14627, USA Search for other works by this author on: GSW Google Scholar J.A. Tarduno; J.A. Tarduno 1Department of Earth and Environmental Sciences, University of Rochester, Rochester, New York 14627, USA Search for other works by this author on: GSW Google Scholar B.N. Pisakin B.N. Pisakin 2Department of Earth Physics, Saint Petersburg State University, Saint Petersburg 199034, Russia Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (5): 415–418. https://doi.org/10.1130/0091-7613(2003)031<0415:POTEGG>2.0.CO;2 Article history received: 10 Oct 2002 rev-recd: 21 Jan 2003 accepted: 23 Jan 2003 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 A.V. Smirnov, J.A. Tarduno, B.N. Pisakin; Paleointensity of the early geodynamo (2.45 Ga) as recorded in Karelia: A single-crystal approach. Geology 2003;; 31 (5): 415–418. doi: https://doi.org/10.1130/0091-7613(2003)031<0415:POTEGG>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 We report Thellier paleointensity results from single plagioclase crystals derived from ca. 2.45 Ga border dikes of the Burakovka layered intrusion (Karelia, Russia). Rock magnetic and transmission electron microscope analyses indicate that these plagioclase crystals contain pseudosingle- to single-domain magnetite inclusions. Fifteen determinations from four dikes meet reliability criteria and yield an average paleointensity of 43.2 ± 10.8 μT, which corresponds to a virtual dipole moment of 8.43 ± 2.11 × 1022 Am2. Although our result is unlikely to adequately represent the time-averaged field, the mean and range of values are similar to those of the present-day field. These values suggest that the inner core, which may stabilize the geodynamo, had started to grow by Early Proterozoic time. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.