Controversies around the Messinian salinity crisis (MSC) are because of the difficulties in establishing genetic and stratigraphic relationships between its deep and shallow-water record. Actually, the Sicilian foreland basin shows both shallow and deep-water Messinian records, thus offering the chance to reconstruct comprehensive MSC scenarios. The Lower Gypsum of Sicily comprises primary and resedimented evaporites separated in space and time by the intra-Messinian unconformity. A composite unit including halite, resedimented gypsum and Calcare di Base accumulated between 5.6 and 5.55 Ma in the main depocentres; it records the acme of the Messinian Salinity Crisis during a tectonic phase coupled with sea-level falls at glacials TG14-TG12. These deposits fully post-date primary gypsum, which precipitated in shallow-water wedge top and foreland ramp basins between 5.96 and 5.6 Ma. This new stratigraphic framework results in a three-stage MSC scenario characterized by different primary evaporite associations: selenite in the first and third stages, carbonate, halite and potash salt in the second one associated with hybrid resedimented evaporites.

The Messinian Sicilian stratigraphy revisited: new insights for the Messinian salinity crisis / Roveri, Marco; Lugli, S; Manzi, Vinicio; Schreiber, B. C.. - In: TERRA NOVA. - ISSN 0954-4879. - 20:(2008), pp. 483-488. [10.1111/j.1365-3121.2008.00842.x]

The Messinian Sicilian stratigraphy revisited: new insights for the Messinian salinity crisis

ROVERI, Marco;MANZI, Vinicio;
2008-01-01

Abstract

Controversies around the Messinian salinity crisis (MSC) are because of the difficulties in establishing genetic and stratigraphic relationships between its deep and shallow-water record. Actually, the Sicilian foreland basin shows both shallow and deep-water Messinian records, thus offering the chance to reconstruct comprehensive MSC scenarios. The Lower Gypsum of Sicily comprises primary and resedimented evaporites separated in space and time by the intra-Messinian unconformity. A composite unit including halite, resedimented gypsum and Calcare di Base accumulated between 5.6 and 5.55 Ma in the main depocentres; it records the acme of the Messinian Salinity Crisis during a tectonic phase coupled with sea-level falls at glacials TG14-TG12. These deposits fully post-date primary gypsum, which precipitated in shallow-water wedge top and foreland ramp basins between 5.96 and 5.6 Ma. This new stratigraphic framework results in a three-stage MSC scenario characterized by different primary evaporite associations: selenite in the first and third stages, carbonate, halite and potash salt in the second one associated with hybrid resedimented evaporites.
2008
The Messinian Sicilian stratigraphy revisited: new insights for the Messinian salinity crisis / Roveri, Marco; Lugli, S; Manzi, Vinicio; Schreiber, B. C.. - In: TERRA NOVA. - ISSN 0954-4879. - 20:(2008), pp. 483-488. [10.1111/j.1365-3121.2008.00842.x]
File in questo prodotto:
File Dimensione Formato  
Roveri2008-TER.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 661.41 kB
Formato Adobe PDF
661.41 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/1855125
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 148
  • ???jsp.display-item.citation.isi??? 143
social impact