Paleomagnetism and rock magnetism from sediments along a continental shelf-to-slope transect in the NW Barents Sea: Implications for geomagnetic and depositional changes during the past 15 thousand years

Paleomagnetic and rock magnetic data were measured on glaciomarine silty-clay successions along an E-W sediment-core transect across the continental shelf and slope of the Kveithola paleo-ice stream system (south of Svalbard, north-western Barents Sea), representing a stratigraphic interval spanning...

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Bibliographic Details
Published in:Global and Planetary Change
Main Authors: Caricchi, Chiara, Lucchi, Renata Giulia, Sagnotti, Leonardo, Macrì, Patrizia, Morigi, Caterina, Melis, Romana, Caffau, Mauro, Rebesco, Michele, Hanebuth, Till J.J.
Other Authors: Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Borgo Grotta Gigante 42/c, 34010 Sgonico, TS, Italy, GEUS (Stratigraphy Department Geological Survey of Denmark and Greenland), 1350 Copenhagen, Denmark, Dipartimento di Matematica e Geoscienze, Università di Trieste, 34128 Trieste, Italy, Department of Coastal and Marine Systems Science, Coastal Carolina University, Conway, SC 29526, USA
Format: Article in Journal/Newspaper
Language:English
Published: 2018
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Online Access:http://hdl.handle.net/2122/10629
https://doi.org/10.1016/j.gloplacha.2017.11.007
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Summary:Paleomagnetic and rock magnetic data were measured on glaciomarine silty-clay successions along an E-W sediment-core transect across the continental shelf and slope of the Kveithola paleo-ice stream system (south of Svalbard, north-western Barents Sea), representing a stratigraphic interval spanning the last deglaciation and the Holocene. The records indicate that magnetite is the main magnetic mineral and that magnetic minerals are distinctly less abundant on the shelf than at the continental slope. The paleomagnetic properties allow for the reconstruction of a well-defined characteristic remanent magnetization (ChRM) throughout the sedimentary successions. The stratigraphic trends of rock magnetic and paleomagnetic parameters are used for a shelf-slope core correlation and sediment facies analysis is applied for depositional processes reconstruction. The new paleomagnetic records compare to the PSV and RPI variation predicted for the core sites by a simulation using the global geomagnetic field variation models SHA.DIF.14k and CALS7K.2 and closest PSV and RPI regional stack curves. The elaborated dataset, corroborated by available 14C ages, provides a fundamental chronological framework to constrain the coupling of shelf-slope sedimentary processes and environmental changes in the NW Barents Sea region during and after deglaciation. Published 10-27 1A. Geomagnetismo e Paleomagnetismo JCR Journal