Interpretacija krednih facijesa otoka Brača u svijetlu paleomagnetskih istraživanja Vanjskih Dinarida

master's thesis

• Title (english): The cretaceous facies from the island of Brač regarding paleomagnetic interpretation in the exterior Dinarides
• Author: Igor Pejnović
• Mentor: Vlasta Ćosović (mentor)
• Committee member: Vlasta Ćosović (predsjednik povjerenstva)
• Committee member: Blanka Cvetko Tešović (član povjerenstva)
• Committee member: Nenad Tomašić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2018-02-21, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Geology and Paleontology

Abstract

Diplomski rad sadrţi facijesne i mikropaleontološke opise uzoraka litificiranih stijena i paleomagnetkih jezgara odabranih lokaliteta otoka Braĉa. Opisani uzorci su starosti raspona od gornje krede do donjeg eocena. Formaciji Gornji Humac odgovaraju naslage iz uvale Maslinova, formacija Dol utvrĊena je u uzorcima iz kamenoloma Nereţišća i s izdanka Zagvozd,a naslage formacije Sumartin nalazimo u uvalama Likva, Splitska, Mirca i Sumartin i kamenolomu Puĉišća). Uzorcima je pridodan taloţni okoliš prema Wilson-ovom modelu facijesnih zona, te je ustanovljeno da su stijene na svim lokalitetima taloţene u uvjetima unutarnje platforme s povremeno ograniĉenom cirkulacijom vode, osim na lokalitetu Nereţišća gdje je pelagiĉki facijes nastao na otvorenom šelfu. Na lokalitetu Likva, uz naslage mastrihta, mikrofosilima je dokazan danski kat (paleocen). Eeocenske (ipr) naslage bogate koniĉnim aglutiniranim foraminiferama leţe na paleocenskim. Mikrofosili odreĊeni u uzorcima iz uvale Mirca uupućuju na paleocensku starost. Usporedbom litoloških svojstava stijene s njihovim primarnim remanentnim magnetizmom ustanovljena (potvrĊena) je njegova negativna korelacija s udjelom bioklasta u stijeni.

Abstract (english)

Facies and micropaleontological interpretation of hand-samples and paleomagentic cores are presented in this Thesis.The studied samples are of the age ranging from the Late Cretaceous to Early Eocene.According to the litostratigraphic description samples from Maslinova bay are Gornji Humac Formation, those from Nereţišća quarry and Zagvozd belong to Dol Formation, while samples collected in Splitska, Likva, Sumartin bays and Puĉišća quarry are Sumartin Formation. Depositional environments were interpreted according to Wilson's model. Sediments were deposited within inner platform setting with restricted or normal circulation pattern, except the Nereţišća samples where pelagic (outer platform) deposition took place. Microfossils found in Likva sediments confirmed Danian age. There these sediments pass upward into Eocene (Ypresian) rich in agglutinated conical foraminifera. Comparison of the lithological properties of the rocks with their natural remanent magnetization confirmed the negative correlation with the amount of bioclasts in the rock.

• Keywords: Braĉ; kreda; paleocen; eocen; Wilson-ovi facijesi; paleomagnetizam
• Keywords (english): Braĉ; Cretaceous; Paleocene; Eocene; Wilson's facies model; paleomagnetism
• Language: croatian
• URN:NBN: urn:nbn:hr:217:201333
• 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: 2018-03-05 13:32:14