Messinian evaporite deposition during sea level rise in the Gulf of Lions (Western Mediterranean)
|Author(s)||Bache Francois1, Gargani Julien2, Suc Jean-Pierre3, 4, Gorini Christian3, 4, Rabineau Marina5, Popescu Speranta-Maria6, Leroux Estelle5, 7, Do Couto Damien3, 4, 8, Jouannic Gwenael2, 9, Rubino Jean-Loup10, Olivet Jean-Louis7, Clauzon Georges11, Dos Reis Antonio Tadeu12, Aslanian Daniel7|
|Affiliation(s)||1 : GNS Sci, Lower Hutt 5040, New Zealand.
2 : Univ Paris 11, Lab GEOPS, UMR 8148, F-91405 Orsay, France.
3 : Univ Paris 11, Univ Paris 04, Inst Sci Terre Paris iSTeP, UMR 7193, F-75005 Paris, France.
4 : CNRS, Inst Sci Terre Paris iSTeP, UMR 7193, F-75005 Paris, France.
5 : IUEM, Domaines Ocean UMR 6538, F-29280 Plouzane, France.
6 : Geobiostrat Data Consulting, F-69140 Rillieux La Pape, France.
7 : IFREMER, Geosci Marines, LGG, F-29280 Plouzane, France.
8 : TOTAL, F-92400 Paris, France.
9 : CETE Est, LRPC, Nancy, France.
10 : TOTAL, TG ISS, CSTJF, F-64018 Pau, France.
11 : Aix Marseille Univ, CNRS, IRD, CEREGE UM34, F-13545 Aix En Provence, France.
12 : Dept Oceanog Geol UERJ Brazil, BR-20550900 Rio De Janeiro, RJ, Brazil.
|Source||Marine And Petroleum Geology (0264-8172) (Elsevier Sci Ltd), 2015-09 , Vol. 66 , P. 262-277|
|WOS© Times Cited||38|
|Note||The Messinian events and hydrocarbon exploration in the Mediterranean|
|Keyword(s)||Messinian, Mediterranean, Gulf of Lions, Seismic stratigraphy, Evaporites|
|Abstract||The Messinian Salinity Crisis resulted from desiccation of the Mediterranean Sea after its isolation from the Atlantic Ocean at the end of the Miocene. Stratal geometry tied to borehole data in the Gulf of Lions show that the pre-crisis continental shelf has been eroded during a major sea-level fall and that sediments from this erosion have been deposited in the basin. This detrital package is onlapped by high amplitude seismic reflectors overlain by the “Messinian Salt” and the “Upper Evaporites”. Towards the shelf, the transition between regressive deposits and overlying onlapping sediments is characterised by a wave-ravinement surface, suggesting that a significant part of the onlapping reflectors and overlying Messinian Evaporites were deposited during a relatively slow landward migration of the shoreline. The clear boundary between the smooth wave-ravinement surface and the subaerial Messinian Erosional Surface observed on the Gulf of Lions shelf and onshore in the Rhône valley is interpreted to have resulted from a rapid acceleration of the Mediterranean sea level rise at the end of the Messinian Salinity Crisis. Numerical simulation of this cycle of sea level change during the Messinian Salinity Crisis and of precipitation of thick evaporites during the slow sea level rise shows that this scenario can be modelled assuming a value of evaporation minus precipitation of 1.75 m3/m2/yr in the deep Mediterranean basins.|