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Fig. 12


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Quantitative analysis of the petrographical characteristics of breccias (see Tab. 1 for uncategorized matrix). A) Agglomerative Hierarchical Clustering was obtained from the UPGMA algorithm and the Euclidean distance. Bootstrap values were obtained after 1000 replications. B) Principal Coordinates Analysis performed with the Gower distance, interpreted following the main descriptive characters contributing to the organisation of the petrographical space. C) One-way pairwise ANOSIM test validates significant differences between pairs of types of breccia (p < 0.05) except for types-3/4 and type-5bis (each represented by 3 samples). Samples are labelled according to their original location.

Analyses quantitatives des brèches, basée sur les critères présentés en tableau 1. A) Classification hiérarchique ascendante (distance euclidienne et méthode UPGMA). Les valeurs de bootstrap sont basées sur 1000 réplications. B) Analyse en coordonnées principales (à partir de la distance de Gower), montrant les principaux critères construisant l’espace pétrographique. C) Test de similarité entre les familles de brèches. Les paires de brèches sont significativement différentes sauf pour la paire types-3/4 et type-5bis dont le nombre d’échantillons étudié est insuffisant pour le test.

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