Εξώφυλλο

Clastic depositional environments in the area of Kassandra-Thermaikos Gulf, northern Greece = Κλαστικά αποθετικά περιβάλλοντα στη περιοχή Κασσάνδρας - Θερμαϊκού κόλπου, βόρεια Ελλάδα

Niki Marina Spyridon Rokana

Περίληψη


This study is interrelated with the previous sedimentary facies and facies associations research in the Kassandra Peninsula of the Western Greece. The procedure of facies analysis pitches in to define a reviewed geological and stratigraphic model, spot coal formations and coalification structures across the Kassandra Peninsula region.
The re-examination of four drilled cores (Kassandra 2 uncored, Kassandra 3 cored, Kassandra 3 uncored and Kassandra 4 cored drilling) revealed eight sedimentary facies that were identified and grouped in six facies associations. In this way, the feasibility of studying the evolution of a fluvio-deltaic system with tidal influences, and sporadically swampy conditions, was achieved.
In addition, a stratigraphic correlation has been established across the successions, in the attempt to feature the geological setting of the region.

Η παρούσα μελέτη σχετίζεται με τις προηγούμενες μελέτες ανάλυσης ιζηματογενών λεκανών ως προς τα ιζηματογενή πετρώματα και τα περιβάλλοντα σχηματισμού τους, στη χερσόνησο της Κασσάνδρας, στη Δυτική Ελλάδα. Η διαδικασία αυτή, της ανάλυσης ιζηματογενών λεκανών έχει στόχο τον καθορισμό ενός αναθεωρημένου γεωλογικού και στρωματογραφικού μοντέλου, τον εντοπισμό σχηματισμών άνθρακα και δομών ενανθράκωσης σε όλη την περιοχή της χερσονήσου της Κασσάνδρας.
Κατά την επανεξέταση τεσσάρων πυρήνων γεωτρήσεων (Κασσάνδρα 2 χωρίς πυρήνα, Κασσάνδρα 3 χωρίς πυρήνα, Κασσάνδρα 3 με πυρήνα και Κασσάνδρα 4 με πυρήνα) εντοπίστηκαν οκτώ ιζηματογενείς φάσεις πετρωμάτων και ομαδοποιήθηκαν σε έξι φασικούς συσχετισμούς – περιβάλλοντα σχηματισμού των πετρωμάτων. Με αυτόν τον τρόπο, έγινε δυνατή η μελέτη της εξέλιξης ενός ποταμο-δελταϊκού συστήματος με παλιρροϊκές επιρροές, και κατά διαστήματα ελώδεις συνθήκες.
Επιπλέον, διαπιστώθηκε η στρωματογραφική συσχέτιση μεταξύ των ακολουθιών, στην προσπάθεια να διερευνηθεί ο γεωλογικός χαρακτήρας της περιοχής.

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Αναφορές


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