Paleomagnetic directions of the Gauss-Matuyama polarity transition recorded in drift sediments (IODP Site U1314) in the North Atlantic

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doi: 10.1186/BF03352845
Author(s): Ohno, Masao; Murakami, F.; Komatsu, F.; Guyodo, Y.; Acton, G.; Kanamatsu, T.; Evans, H. F.; Nanayama, F.
Author Affiliation(s): Primary:
Kyushu University, Department of Environmental Changes, Fukuoka, Japan
Other:
University of California, Davis, United States
Japan Agency for Marine-Earth Science and Technology, Japan
University of Florida, United States
Geological Survey of Japan, Japan
Volume Title: Earth, Planets and Space
Source: Earth, Planets and Space, 60(9), p.e13-e16. Publisher: Terra Scientific Publishing Company (TERRAPUB), Tokyo, Japan. ISSN: 1343-8832
Note: In English. Accessed on Feb. 9, 2009. 28 refs.; illus., incl. sketch maps
Summary: The geomagnetic field direction during the Gauss-Matuyama (G-M) polarity transition was investigated from a high-accumulation-rate (≥10 cm/kyr) sediment core drilled in the Gardar drift in the North Atlantic at Site U1314 during Expedition 306 of the Integrated Ocean Drilling Program (IODP). A well-defined characteristic remanent magnetization was generally obtained by alternating field demagnetization. The consistency of the results with records from Icelandic lavas confirms that the North Atlantic drift sediments contain a high-fidelity record of the geomagnetic field change. During the G-M transition, the virtual geomagnetic pole (VGP) latitude shows north-south-north-south rebounding, with the three VGP paths falling within different longitudinal bands. Two of the three paths are close to or within the preferred bands in which transitional VGPs are suggested to be longitudinally confined. Three additional loops occur that approach mid-to-low latitudes from the North or South pole regions. In addition, the VGPs show rapid movement (directional jumps) between VGP clusters. Copyright 2008 The Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan
Year of Publication: 2008
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 18 Geophysics, Solid-Earth; Alternating field demagnetization; Atlantic Ocean; Cenozoic; Demagnetization; Expedition 306; Gauss Chron; IODP Site U1314; Integrated Ocean Drilling Program; Lava; Magnetic declination; Magnetic field; Magnetic inclination; Magnetization; Matuyama Chron; Neogene; North Atlantic; Northeast Atlantic; Paleomagnetism; Pliocene; Pole positions; Remanent magnetization; Reversals; Sedimentation rates; Tertiary; Upper Cenozoic
Coordinates: N562200 N562200 W0275300 W0275300
Record ID: 2009042135
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