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Age of Matuyama-Brunhes boundary constrained by U-Pb zircon dating of a widespread tephra

2015; Geological Society of America; Volume: 43; Issue: 6 Linguagem: Inglês

10.1130/g36625.1

1943-2682

Yûsuke Suganuma, Makoto Okada, Kenji Horie, H. Kaiden, Mami Takehara, Ryoko Senda, Jun‐Ichi Kimura, Kenji Kawamura, Yuki Haneda, Osamu Kazaoka, Martin J. Head,

Methane Hydrates and Related Phenomena

Research Article| June 01, 2015 Age of Matuyama-Brunhes boundary constrained by U-Pb zircon dating of a widespread tephra Yusuke Suganuma; Yusuke Suganuma * 1National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan2Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI), Tachikawa, Tokyo 190-8518, Japan *E-mail: suganuma.yusuke@nipr.ac.jp Search for other works by this author on: GSW Google Scholar Makoto Okada; Makoto Okada 3Department of Earth Sciences, Ibaraki University, Mito, Ibaraki 310-8512, Japan Search for other works by this author on: GSW Google Scholar Kenji Horie; Kenji Horie 1National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan2Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI), Tachikawa, Tokyo 190-8518, Japan4Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan Search for other works by this author on: GSW Google Scholar Hiroshi Kaiden; Hiroshi Kaiden 1National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan2Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI), Tachikawa, Tokyo 190-8518, Japan Search for other works by this author on: GSW Google Scholar Mami Takehara; Mami Takehara 1National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan5Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 812-8581, Japan Search for other works by this author on: GSW Google Scholar Ryoko Senda; Ryoko Senda 4Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan Search for other works by this author on: GSW Google Scholar Jun-Ichi Kimura; Jun-Ichi Kimura 4Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan Search for other works by this author on: GSW Google Scholar Kenji Kawamura; Kenji Kawamura 1National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan2Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI), Tachikawa, Tokyo 190-8518, Japan4Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan Search for other works by this author on: GSW Google Scholar Yuki Haneda; Yuki Haneda 3Department of Earth Sciences, Ibaraki University, Mito, Ibaraki 310-8512, Japan Search for other works by this author on: GSW Google Scholar Osamu Kazaoka; Osamu Kazaoka 6Research Institute of Environmental Geology, Chiba 261-0005, Japan Search for other works by this author on: GSW Google Scholar Martin J. Head Martin J. Head 7Department of Earth Sciences, Brock University, St. Catharines, Ontario L2S 3A1, Canada Search for other works by this author on: GSW Google Scholar Geology (2015) 43 (6): 491–494. https://doi.org/10.1130/G36625.1 Article history received: 16 Jan 2015 rev-recd: 07 Mar 2015 accepted: 12 Mar 2015 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Yusuke Suganuma, Makoto Okada, Kenji Horie, Hiroshi Kaiden, Mami Takehara, Ryoko Senda, Jun-Ichi Kimura, Kenji Kawamura, Yuki Haneda, Osamu Kazaoka, Martin J. Head; Age of Matuyama-Brunhes boundary constrained by U-Pb zircon dating of a widespread tephra. Geology 2015;; 43 (6): 491–494. doi: https://doi.org/10.1130/G36625.1 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 The youngest geomagnetic polarity reversal, the Matuyama-Brunhes boundary (MBB), provides an important datum plane for sediments, ice cores, and lavas. Its frequently cited age of 780 ka is based on orbital tuning of marine sedimentary records, and is supported by 40Ar/39Ar dating of Hawaiian lavas using recent age calibrations. Challenging this age, however, are reports of younger astrochronological ages based on oxygen isotope stratigraphy of high-sedimentation-rate marine records, and cosmogenic nuclides in marine sediments and an Antarctic ice core. Here, we present a U-Pb zircon age of 772.7 ± 7.2 ka from a marine-deposited tephra just below the MBB in a forearc basin in Japan. U-Pb dating has a distinct advantage over 40Ar/39Ar dating in that it is relatively free from assumptions regarding standardization and decay constants. This U-Pb zircon age, coupled with a newly obtained oxygen isotope chronology, yields an MBB age of 770.2 ± 7.3 ka. Our MBB age is consistent with those based on the latest orbitally tuned marine sediment records and on an Antarctic ice core. We provide the first direct comparison between orbital tuning, U-Pb dating, and magnetostratigraphy for the MBB, fulfilling a key requirement in calibrating the geological time scale. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.