Dallanave, Edoardo; Muttoni, Giovanni; Agnini, Claudia; Tauxe, Lisa; Rio, Domenico (2012): Is there a normal magnetic-polarity event during the Palaeocene-Eocene Thermal Maximum ( approximately 55 Ma)? Insights from the palaeomagnetic record of the Belluno Basin (Italy). Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society, International, Geophysical Journal International, 191 (2), 517-529, georefid:2013-013534

In the lowermost Eocene sedimentary record of Ocean Drilling Program Site 1262 (Leg 208, Walvis Ridge, South Atlantic Ocean), the presence of a approximately 53-kyr-long normal polarity event has been recorded within the approximately 2.55-Myr-long reverse polarity Chron C24r ( approximately 53.3-55.9 Ma) and termed Palaeocene-Eocene magnetic reversal (PEMR). The origin of the PEMR has been speculatively related to a change in the Earth's rotation rate that was in turn influenced by an abrupt overturning of the ocean-atmosphere circulation that occurred during the Palaeocene-Eocene thermal maximum (PETM) at approximately 55 Ma. Such provocative genesis for a magnetic-polarity reversal demands the PEMR to be confirmed (or refuted) in additional PETM sections. Here, we present detailed palaeomagnetic and rock-magnetic data from the Forada and Cicogna sections of the Belluno Basin in NE Italy, which contain an expanded and continuous record of the PETM termed clay marl unit (CMU). Our data indicate that these sediments were deposited during a continuous interval of reverse geomagnetic field polarity. We therefore conclude that no magnetic-polarity reversals occurred throughout the PETM. In addition, we studied the origin of the high degree of flattening affecting the characteristic magnetic component directions of the sediments, which we interpret as due to a combination of depositional inclination shallowing typical of detrital haematite, and post-depositional compaction of clays, particularly abundant in the carbonate-depleted CMU. Abstract Copyright (2012), RAS.
West: 12.0400 East: 12.1400 North: 46.0300 South: 46.0200
Expedition: 208
Site: 208-1262
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.1111/j.1365-246X.2012.05627.x (c.f. for more detailed metadata)
This metadata in ISO19139 XML format