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Authors: Budillon, F.*
Lirer, F.*
Iorio, M.*
Macrì, P.*
Sagnotti, L.*
Vallefuoco, M.*
Ferraro, L.*
Garziglia, S.*
Innangi, S.*
Sahabi, M.*
Tonielli, R.*
Title: Integrated stratigraphic reconstruction for the last 80 kyr in a deep sector of the Sardinia Channel (Western Mediterranean)
Title of journal: Deep-Sea Research II
Series/Report no.: 11-12 / 56 (2009)
Publisher: Elsevier
Issue Date: May-2009
DOI: 10.1016/j.dsr2.2008.07.026
Keywords: Integrated stratigraphy
Late Neogene marine record
Reflectance 550 nm %
Sardinia Channel
Western Mediterranean
Abstract: A quantitative analysis of planktonic foraminifera, coupled with petrophysical and paleomagnetic measurements and 14C AMS calibrations, was carried out on a deep core recovered in the Sardinia Channel (Western Mediterranean Sea), during the CIESM Sub2 survey, providing an integrated stratigraphic time-framework over the last 80 kyr. Significant changes in the quantitative distribution of planktonic foraminifera allowed the identification of several eco-bioevents useful to accurately mark the boundaries of the eco-biozones widely recognised in the Western Mediterranean records and used for large scale correlations. Namely, 10 eco-biozones were identified based on the relative abundance of selected climate sensitive planktonic foraminiferal species. Sixteen codified eco-bioevents were correlated with the Alboran Sea planktonic foraminiferal data and four climatic global events (Sapropel S1, Younger Dryas, Greenland Isotope Interstadial 1, Greenland Isotope Stadial 2, Heinrich event H1-H6) were recognized. The eco-bioevents together with the 14C AMS calibrations allowed us to define an accurate age model, spanning between 2 and 83 kyr. The reliability of the age model was confirmed by comparing the colour reflectance (550 nm%) data of the studied record with the astronomically tuned record from the Ionian sea (ODP-Site 964). A mean sedimentation rate of about 7 cm/kyr included three turbidite event beds that were chronologically constrained within the relative low stand and lowering sea level phases of the MIS 4 and 3. The deep-sea sedimentary record includes a distinct tephra occurring at the base of the core which dates 78 ka cal. BP. The paleomagnetic data provide a well-defined record of the characteristic remanent magnetization that may be used to reconstruct the geomagnetic paleosecular variation for the Mediterranean back to 83 kyr.
Appears in Collections:04.04.04. Marine geology
04.04.08. Sediments: dating, processes, transport
04.05.06. Paleomagnetism
04.04.10. Stratigraphy
Papers Published / Papers in press

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