Sedimentološke značajke aptsko - albskih naslaga i emerzijskih površina kamenoloma Kanfanar, Istra

master's thesis

• Title (english): Sedimentological characteristics of the Aptian - Albian deposits and subaerial exposure surfaces of the Kanfanar Quarry, Istria
• Author: Eric Hadžić
• Mentor: Maja Martinuš (mentor)
• Mentor: Blanka Cvetko Tešović (komentor)
• Committee member: Maja Martinuš (predsjednik povjerenstva)
• Committee member: Blanka Cvetko Tešović (član povjerenstva)
• Committee member: Dražen Kurtanjek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2023-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology

Abstract

Slijed naslaga Kanfanar otkriven je unutar istoimenog kamenoloma u središnjoj Istri. Obuhvaća naslage starosti stariji–mlađi apt i mlađi alb koje su odijeljene glavnom emerzijskom površinom, odnosno regionalnom diskordancijom. Sedimentološke i mikropaleontološke značajke opisane su u ukupno 71 uzorku i utvrđena su četiri mikrofacijesa, svaki s dva podtipa (a i b). Mikrofacijes MF 1 (s pripadajućim podtipovima MF 1a i MF 1b) obuhvaća mikritne vapnence s bačinelama, dekastronemama, bentičkim... More foraminiferama, bioklastima, onkoidima te ukazuje na okoliš potplimne zone niske energije vode. Mikrofacijes MF 2 (i podtipovi MF 2a i MF 2b) obuhvaća sitnozrnastije mikritne vapnence s intraklastima, bioklastima, peloidima i bentičkim foraminiferama čime ukazuje na okoliš potplimne zone povišene energije vode. Mikrofacijes MF 3, s podtipovima MF 3a i MF 3b, obuhvaća zrnastije tipove vapnenaca s litoklastima, bioklastima, peloidima, miliolidama i dazikladalnim algama čime ukazuje na okoliš plimne zone. Mikrofacijes MF 4 predstavlja postupni prijelaz iz morskog okoliša u slatkovodni okoliš pa razlikujemo fenestralne vapnence (MF 4a) i haroficejske vapnence (MF 4b). Detaljno je opisana i određena mikrofosilna zajednica bentičkih foraminifera i dazikladalnih alga koja je potvrdila starijeaptsku do mlađealbsku starost naslaga. Glavnu emerzijsku površinu karakterizira brečirani materijal s glinovitim ispunama i ukazuje na preplavljivanje nakon dugotrajne kopnene faze. Nekoliko sličnih emerzijskih površina u krovini glavne emerzije posljedica su oscilirajuće transgresije tijekom mlađeg alba. Less

Abstract (english)

Outcrop of Kanfanar deposits is situated in a quarry of the same name in central Istria. It comprises deposits of the Early–Late Aptian and Late Albian age separated by the main emersion surface, i.e., by regional Aptian–Albian unconformity. Sedimentological and micropaleontological characteristics were described in a total of 71 samples and four microfacies were identified, each with two subtypes (a and b). Microfacies MF 1 (with corresponding subtypes MF 1a and MF 1b) comprises micrite... More limestones with Bacinella irregularis, Decastronemas, benthic foraminifera, bioclasts and oncoids indicating low water energy subtidal environments. Microfacies MF 2 (subtypes MF 2a and MF 2b) includes fine grained micrite limestone with intraclasts, bioclasts, peloids and benthic foraminifera indicating subtidal environments with increased water energy. Microfacies MF 3, with subtypes MF 3a and MF 3b, includes granular limestone types with lithoclasts, bioclasts, peloids, Milliolidae and dasyclad algae, indicating the environment of the intratidal zone. Microfacies MF 4 represents the gradual transition from the marine environment to the freshwater environment involving fenestral limestone (MF 4a) and charophycean limestone (MF 4b). The detaily described microfossil community composed of benthic foraminifera and dasyclad algae confirmed the Early–Late Aptian and the Late Albian age of the studied deposits. The main emersion surface is characterised by breccia material with clay fillings and indicates flooding after a long–lasting terrestrial phase. Several similar emersion surfaces in the deposits overlying the main emersion are the result of oscillating transgression during the Late Albian. Less

• Keywords: taložni okoliši; mikrofacijesi; mikrofosilne zajednice; apt; alb; emerzijske površine; kamenolom Kanfanar
• Keywords (english): depositional environments; microfacies; microfossil communities; Aptian; Albian; emersion surfaces; Kanfanar quarry
• Language: croatian
• URN:NBN: urn:nbn:hr:217:551109
• Project: Number: IP-2019-04-8054; Title: Zapadnoistarska antiklinala kao idealni prirodni laboratorij za proučavanje regionalnih diskordancija u karbonatnim stijenama; Acronym: WIANLab; Leader: Goran Durn; Jurisdiction: Croatia; Funder: Hrvatska zaklada za znanost; Funding stream: Research Projects
• Study programme: Title: Geology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni magistar/magistra geologije (sveučilišni magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2024-09-27
• Created on: 2025-01-31 09:04:47