Radiocarbon dates of sediment cores obtained during Bio Hespérides cruise SVAIS and OGS Explora cruise EGLACOM between 2007-2008
Tipo Dataset
Classe Dati di campioni fisici (campioni e parametri fisici di rocce, minerali e materiali vari)
Event Label
Latitude Of Event
Longitude Of Event
Elevation Of Event
Date/time
Date/time End
Sample Id
Depth, Sediment/rock
Age, Dated Material
Description
Method Comment
Age, Dated
Age, Dated Standard Deviation
Δ13c
Age, Minimum/young
Age, Maximum/old
Calendar Age
Gravity Corer
Piston Corer
Age, 14c Ams
Age, 14c Calibrated, Calib 6.0 (reimer Et Al., 2009)
Eglacom
29he20070802
Ogs-Explora
Hespérides
International Polar Year (2007-2008) (ipy)
A high-resolution paleomagnetic and rock magnetic study has been carried out on sediment cores collected in glaciomarine silty-clay sequences from the continental shelf and slope of the southern Storfjorden trough-mouth fan, on the northwestern Barents Sea continental margin. The Storfjorden sedimentary system was investigated during the SVAIS and EGLACOM cruises, when 10 gravity cores, with a variable length from 1.03 m to 6.41 m, were retrieved. Accelerator mass spectrometry (AMS) 14C analyses on 24 samples indicate that the cores span a time interval that includes the Holocene, the last deglaciation phase and in some cores the last glacial maximum. The sediments carry a well-defined characteristic remanent magnetization and have a valuable potential to reconstruct the paleosecular variation (PSV) of the geomagnetic field, including relative paleointensity (RPI) variations. The paleomagnetic data allow reconstruction of past dynamics and amplitude of the geomagnetic field variations at high northern latitudes (75°-76° N). At the same time, the rock magnetic and paleomagnetic data allow a high-resolution correlation of the sedimentary sequences and a refinement of their preliminary age models. The Holocene PSV and RPI records appear particularly sound, since they are consistent between cores and they can be correlated to the closest regional stacking curves (UK PSV, FENNOSTACK and FENNORPIS) and global geomagnetic model for the last 7 ka (CALS7k.2). The computed amplitude of secular variation is lower than that outlined by some geomagnetic field models, suggesting that it has been almost independent from latitude during the Holocene.
Data e Risorse
Questo dataset non ha dati
Citare come
Sagnotti L., Macrì P., Lucchi R. G., Rebesco M., Camerlenghi A. (2011). (Table 2) Radiocarbon dates of sediment cores obtained during Bio Hespérides cruise SVAIS and OGS Explora cruise EGLACOM between 2007-2008, supplement to: Sagnotti, Leonardo; Macrì, Patrizia; Lucchi, Renata G; Rebesco, Michele; Camerlenghi, Angelo (2011): A Holocene paleosecular variation record from the northwestern Barents Sea continental margin. Geochemistry, Geophysics, Geosystems, 12(11), 1-24 [Data set]. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/pangaea.819543
