Analyse statistique de la variation verticale des descripteurs dans la formation de Vions (Berriasien supérieur, Jura méridional)

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Analyse statistique de la variation verticale des descripteurs dans la formation de Vions (Berriasien supérieur, Jura méridional)

JAQUET, Jean-Michel

Abstract

La variation verticale de cinq descripteurs numériques est étudiée par diverses méthodes sur sept coupes de la Formation de Vions (Berriasien supérieur, Jura méridional). Ces méthodes comprennent principalement l'adoucissage, le test de "runs", l'analyse de tendance verticale et l'analyse d'autocorrélation. Dans le cadre de cette dernière technique, on étudie plus particulièrement les processus stochastiques autorégressifs et ceux de moyennes mobiles, et par simulation, produit des séries et des corrélogrammes auxquels sont comparés ceux des descripteurs de la Formation de Vions. Deux modèles permettent d'approximer la variation verticale de ces descripteurs: le premier est autorégressif d'ordre 1-2, le second de moyennes mobiles d'ordre 1-6. La signification géologique de ces modèles mathématiques est ensuite discutée et un modèle conceptuel de l'évolution verticale de la Formation de Vions est proposé. Ce dernier invoque des mouvements transgressifs et régressifs de la mer, auxquels se superposent des arrivées terrigènes liées à des pulsations orogéniques qui peuvent être considérées [...]

JAQUET, Jean-Michel. Analyse statistique de la variation verticale des descripteurs dans la formation de Vions (Berriasien supérieur, Jura méridional). Archives des Sciences, 1973, vol.

26, no. 3, p. 247-283

DOI : 10.5169/SEALS-739931

Available at:

http://archive-ouverte.unige.ch/unige:151241

Disclaimer: layout of this document may differ from the published version.

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Analyse statistique de la variation verticale des descripteurs dans la formation de Vions (Berriasien supérieur, Jura méridional)

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