Quantification des flux sédimentaires et de la subsidence du bassin ...
Quantification des flux sédimentaires et de la subsidence du bassin ...
Quantification des flux sédimentaires et de la subsidence du bassin ...
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tel-00790852, version 1 - 21 Feb 2013<br />
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- geomorphological mo<strong>de</strong>ls (Messinian erosion) (Babault <strong>et</strong> al., 2006; Garcia-<br />
Castel<strong>la</strong>nos <strong>et</strong> al., 2009; Gargani, 2004a, b; Log<strong>et</strong> and Van Den Driessche, 2006;<br />
Log<strong>et</strong> <strong>et</strong> al., 2005)<br />
- sedimentological mo<strong>de</strong>ls (Messinian evaporites) (B<strong>la</strong>nc, 2002; B<strong>la</strong>nc, 2000; Garcia-<br />
Castel<strong>la</strong>nos and Vil<strong>la</strong>senor, 2011; Gargani <strong>et</strong> al., 2008; Krijgsman and Meijer, 2008;<br />
Meijer, 2006; Meijer and Krijgsman, 2005)<br />
- geodynamical mo<strong>de</strong>ls and vertical movement (isostasy) mo<strong>de</strong>lling (Duggen <strong>et</strong> al.,<br />
2003; Gargani, 2004a, b; Gargani <strong>et</strong> al., 2010; Govers, 2009; Govers <strong>et</strong> al., 2009;<br />
Norman and Chase, 1986)<br />
- oceanographic and atmospheric mo<strong>de</strong>lling (Alhammoud <strong>et</strong> al., 2010; G<strong>la</strong>dstone <strong>et</strong> al.,<br />
2007; Meijer and Tuenter, 2007; Murphy <strong>et</strong> al., 2009; Schneck <strong>et</strong> al., 2010)<br />
- complex interaction mo<strong>de</strong>lling (b<strong>et</strong>ween climate, global sea-level, tectonic, sea-water<br />
inflow and river discharge) (Garcia-Castel<strong>la</strong>nos and Vil<strong>la</strong>senor, 2011; Gargani <strong>et</strong> al.,<br />
2008; Gargani and Rigoll<strong>et</strong>, 2007)<br />
These mo<strong>de</strong>ls have probably contributed to improve the un<strong>de</strong>rstanding of the MSC and<br />
highlighted the complexity of this event. In<strong>de</strong>ed, various complex feedback processes were<br />
involved in this crisis and justify the use of a mo<strong>de</strong>lling approach. Furthermore, mo<strong>de</strong>lling<br />
approach allows to test quantified data. As a consequence, mo<strong>de</strong>lling results have led to<br />
generate new i<strong>de</strong>as.<br />
Such results are used to argue for and against synchronous or diachronous scenarios. It is<br />
often conclu<strong>de</strong>d from mo<strong>de</strong>lling that the evaporitic sedimentation in the central<br />
Mediterranean basins began before any drawdown of sea-level at 5.60 Ma (B<strong>la</strong>nc, 2006;<br />
Govers, 2009; Govers <strong>et</strong> al., 2009; Krijgsman and Meijer, 2008; Meijer and Krijgsman,<br />
2005). To support this hypothesis, the authors invoke a rise in salinity sufficient to precipitate<br />
evaporites before the sea-level drop (B<strong>la</strong>nc, 2006), either argue that a compl<strong>et</strong>e blocking of<br />
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