Submitted on: 01 May 2017.
Revised on: 25 June 2017.
Accepted on: 04 August 2017.
___________________COMPTES RENDUS GEOSCIENCE---ACAD SCIENCES
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Submitted on: 19 November 2011.
Revised on: 11 December 2011.
Accepted on: 04 January 2012.
___________________COMPTES RENDUS GEOSCIENCE---ACAD SCIENCES
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Submitted on: 30 March 2006.
Revised on: 04 June 2006.
Accepted on: 24 June 2006.
___________________COMPTES RENDUS GEOSCIENCE---ACAD SCIENCES
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