Statistical treatment of bed thickness distribution in submarine fan deposits : outcrop examples from the cenozoic Pindos foreland basin in Achaia, Western Greece

• Κύριος συγγραφέας: Νότη, Αλεξάνδρα
• Άλλοι συγγραφείς: Ζεληλίδης, Αβραάμ
• Μορφή: Thesis
• Γλώσσα: English
• Έκδοση: 2018
• Θέματα: Turbidite deposits; Submarine fan deposits; Pindos foreland basin; Bed thickness statistics; Τουρβιδιτικές αποθέσεις; Υποθαλάσσια ριπίδια; Λεκάνη προχώρας Πίνδου; Στατιστική πάχους στρωμάτων; 551.354

A statistical treatment of turbidite bed thickness was performed for 11 turbidite successions, which constitute part of Pindos foreland basin, in the region of Tritea, South Achaia, Northwestern Peloponnesus, Greece. Statistical analysis was particularly focused on fitting of widely used non-normal theoretical distribution models using robust non-parametric goodness-of-fit statistical tests and the results were carried out showed a complex character of our sedimentary basin. Distribution fitting results indicate that turbidite bed thickness data seem to be best characterized by a mixture of lognormal distributions for the whole bed thickness range and seem to fit better to the turbidite event than coarse division thickness populations, with a very slight difference though. Both coarse division and turbidite events exhibit power law tails, which are particularly observed to hold for the thick-bedded thickness population of the studied basin deposits. Generally, it seems that the more distal outer fan deposits of the upper part of the succession exhibit power law tails, while the more proximal inner fan deposits are characterized by lognormal distribution. All sections exhibit Hurst phenomenon (K>0.5) both for sandstone thickness and sand/mud thickness percentages, but the observed facies clustering seems to be statistically significant in 6 out of 11 outcrops. Sub-environment classification was successful only in outer fan sections, classified as lobe-interlobe deposits. Failure of the method for correct classification of inner fan outcrops may be attributed to the thin-bedded character of the latter and the absence of thin- and thick-bedded alternations, which could produce higher Hurst K values.