Υποθαλάσσια ριπίδια: τύποι ροών και υπό-περιβάλλοντα ιζηματογένεσης = Submarine fans: flow types and depositional sub-environmants.

Παρασκευή Χρήστος Βασιλειάδου

Υποθαλάσσια ριπίδια: τύποι ροών και υπό-περιβάλλοντα ιζηματογένεσης = Submarine fans: flow types and depositional sub-environmants.

Παρασκευή Χρήστος Βασιλειάδου

Περίληψη

Η παρούσα διπλωματική εργασία παρουσιάζει μια βιβλιογραφική ανασκόπηση των διαφορετικών τύπων ροών που ευθύνονται για την απόθεση του ιζήματος στα βαθιά αποθετικά περιβάλλοντα, καθώς και μια ανασκόπηση των πιο συχνών υποπεριβαλλόντων ιζηματογένεσης που συναντώνται στα συστήματα των υποθαλάσσιων ριπιδίων. η ανασκόπηση περιγράφει και ερμηνεύει δέκα διαφορετικές ιζηματογενείς φάσεις (κροκαλοπαγή πλούσιο σε συνδετικό υλικό και κροκάλες, συμπαγή ψαμμίτη, ψαμμίτης με παράλληλη ελασμάτωση από ροές σύρσης, ψαμμίτης με παράλληλη ελασμάτωση, ψαμμίτης με αναρριχώμενη διασταυρούμενη ελασμάτωση, ψαμμίτης με ελικοειδής ελασμάτωση, συμπαγής ιλυόλιθος, ιλυόλιθος με διασταυρούμενη ελασμάτωση και ιλυόλιθος με παράλληλη ελασμάτωση). επιπλέον, η ανασκόπηση περιγράφει και ερμηνεύει οχτώ διαφορετικά υποπεριβαλλόντα ιζηματογένεσης (στον άξονα των λοβών, παραπλεύρως του άξονα των λοβών, στα περιθώρια των λοβών, στα απομακρυσμένα περιθώρια των λοβών,ενδότερων και εξώτερων εσωτερικών αναχωμάτων, ενδότερων και εξώτερων εξωτερικών αναχωμάτων).

This honours thesis offers a literature review on the most common flow types that are responsible for the sediment deposition in deep water settings, along with a review on the most common depositional sub-environments that occur in deep-water submarine fan deposits. the review describes and interprets ten different sedimentary facies (matrix- and clast-supported conglomerate, structureless sandstone, spaced planar-laminated sandstone, parallel-laminated sandstone, climbing ripple-cross laminated sandstone, convolute cross-laminated sandstone, sandstone, structureless mudstone, ripple cross-laminated mudstone and parallel laminated mudstone). further, the review describes and interprets eight depositional sub-environments (lobe axis, lobe off axis, 8 lobe fringe, distal lobe fringe, inner- and outer internal levee, inner and outer external levee).Η

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Αναφορές

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