Facijesna raznolikost cenomanskih naslaga Jadranske karbonatne platforme; primjer Savudrija, Istra

undergraduate thesis

• Title (english): Facies variability of the Cenomanian deposits of the Adriatic carbonate platform; example Savudrija, Istria
• Author: Helena Verk
• Mentor: Blanka Cvetko Tešović (mentor)
• Committee member: Blanka Cvetko Tešović (predsjednik povjerenstva)
• Committee member: Marijan Kovačić (član povjerenstva)
• Committee member: Damir Bucković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2021-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Geology and Paleontology

Abstract

Istra pripada sjeverozapadnom dijelu bivše Jadranske karbonatne platforme, jedne od najvećih mezozojskih karbonatnih platformi Perimediteranske regije. Intenzivna postsedimentacijska tektonika tijekom paleogena i neogena uzrokuje kompleksnu građu cijelog područja karbonatne platforme čime se izdvajaju specifični sustavi taloženja s čestim bočnim i vertikalnim varijacijama facijesa unutar nekad homogenog područja. Unutar ovog rada istraživani su i opisani mikrofacijesi na području Savudrije, Istra. Mikroskopskom analizom utvrđeno je pet facijesa/mikrofacijesa gornjokredne starosti taloženi na karbonatnoj platformi. Većinu facijesa karakteriziraju bentičke foraminifere, alge, cijanobakterije i peloidi u različitim omjerima što upućuje da su naslage taložene u plitkomorskim okolišima karbonatne platforme. Prepoznati facijesi/mikrofacijesi mogu se korelirati s formacijom Milna (cenoman) na otoku Braču gdje je prvi put opisan slijed gornjokrednih naslaga.

Abstract (english)

Istria belongs to the northwestern part of the former Adriatic Carbonate Platform (AdCP), one of the largest Mesosoic carbonate platforms of the Perimediterranean region. Intensive post-depositional tectonics during Paleocene and Eocene causes a complex structure of the entire carbonate platform. Specific deposition systems characterised by frequent lateral and vertical variations of facies were established within a formerly homogeneous area. Within this paper, microfacies in the area of Savudrija, Istria were investigated and described. Microscopic analysis revealed five upper Cretaceous facies/microfacies deposited on the carbonate platform. Most facies are characterized by benthic foraminifera, algae, cyanobacteria, and peloids in varying proportions suggesting that deposits are deposited in the shallow marine environments of the carbonate platform. The identified facies/microfacies can be correlated with the Milna (Cenomanian) formation on the island of Brač, where the sequence of Upper Cretaceous deposits was first described.

• Keywords: Jadranska karbonatna platforma; Savudrija (sjeverna Istra; Hrvatska); cenomanski vapnenci; facijesi/mikrofacijesi
• Keywords (english): Adriatic Carbonate Platform; Savudrija (western Istria; Croatia); Cenomanian limestones; facies/microfacies
• Language: croatian
• URN:NBN: urn:nbn:hr:217:454727
• Study programme: Title: Undergraduate university study of Geology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) geologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-01-18 14:07:34