Eocenske planktonske foraminifere lokaliteta Jakomići, Pazinski bazen

master's thesis

• Title (english): Eocene planktonic foraminifera from Jakomići locality, Pazin Basin
• Author: Katja Mužek
• Mentor: Đurđica Pezelj (mentor)
• Committee member: Vlasta Ćosović (predsjednik povjerenstva)
• Committee member: Nenad Tomašić (član povjerenstva)
• Committee member: Đurđica Pezelj (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2022-02-23, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Geology and Paleontology

Abstract

S ciljem odredbe starosti naslaga te paleoekološke interpretacije okoliša analizirane su naslage lapora s lokaliteta Jakomići u Pazinskom bazenu. Uzorci su laboratorijski obrađeni metodom muljanja te pripremljeni za mikroskopsku analizu kojom su izdvojene planktonske foraminifere od bentičkih. Izračunat je odnos planktona i bentosa nakon kojeg je slijedilo taksonomsko određivanje planktonskih foraminifera na razini vrste. Na temelju preklapanja stratigrafskih raspona određenih vrsta planktonskih foraminifera utvrđena je starost naslaga srednjeg eocena (gornji dio luteta i donji barton) koja pripada zoni E11 Morozovelloides lehneri. Na temelju udjela planktonskih foraminifera u zajednici dubina taloženja odgovara okolišu gornjeg dijela kontinentalne padine odnosno gornjem batijalu. Određen je eutrofičan do mezotrofičan okoliš raspona dubine vodenog stupca od površinskog sloja do sloja termokline.

Abstract (english)

In order to determine the age of the deposits and paleoecological interpretation of the environment, marl samples from the Jakomići locality in the Pazin Basin were analyzed. The samples were laboratory processed by wet sieving method and prepared for microscopic analysis, which separated the planktonic foraminifera from the benthic ones. The relationship between planktonic and benthic foraminifera was calculated, followed by taxonomic determination of planktonic foraminifera at the species level. Based on the overlap of the stratigraphic ranges of planktonic foraminifera species, the age of the Middle Eocene (upper part of the Lutetian and lower Bartonian), E11 zone Morozovelloides lehneri was determined. Based on the percentage of planktonic foraminifera in the foraminiferal assemblages, the deposition depth corresponds to the environment of the upper bathyal. The eutrophic to mesotrophic range of the environment from the surface layer of the water column to the thermocline layer was determined.

• Keywords: planktonske foraminifere; srednji eocen; paleoekološka interpretacija; Pazinski bazen; Istra
• Keywords (english): planktonic foraminifera; Middle Eocene; paleoecological interpretation; Pazin
• Language: croatian
• URN:NBN: urn:nbn:hr:217:806806
• Study programme: Title: Graduate university study of Geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra geologije (magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-10-13 11:30:08