Naslov
Organic petrology of the Permian and Triassic sedimentary rocks of the External Dinarides, Croatia

Autori
Troskot-Čorbić, Tamara ; Španić, Darko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
62nd International Committee for Coal and Organic Petrology Meeting, Abstracts / Ercegovac, Marko - Beograd : Srpska akademija nauka i umetnosti (SANU), 2010, 50-51

Skup
62nd International Committee for Coal and Organic Petrology Meeting

Mjesto i datum
Beograd, Srbija, 26.09.2010. - 02.10.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Dinarides, organic petrology

Sažetak
The External (Karst or Outer) Dinarides are a complex folded, faulted and imbricate belt which developed along the northeastern margin of the Adriatic Sea. They are characterized by very thick carbonate succession that ranges in age from the Middle Permian (or even Late Carboniferous) to the Eocene. The entire carbonate succession was deposited within carbonate platform environments (Velić et al., 2002, Tari, 2002, Vlahović et al., 2002, 2005). Platform carbonate deposits are characterized by frequent lateral and vertical alternations of different facies mostly associated with diverse shallow marine environments, but there are also carbonate slope deposits and those representing temporarily drowned platform facies and intraplatform troughs (Tišljar et al., 2002). In the Carboniferous period, siliciclastic deposition prevailed, with rare lenses of limestones. The permian to Triassic is characterized by carbonate and mixed siliciclastic-carbonate deposits, because the study area, during this period was an epeiric platform along the northern Gondwana margin (Vlahović et al., 2005). All these carbonate deposits are the long-term objective of detailed organic geochemical characterization (Barić et al., 2003). The aim of this paper is to represent organic petrology of the Permian and Triassic sedimentary rocks of the Dinarides. For that purpose limestones and shales were collected from localities in the wider area of Gorski Kotar, Lika and Velebit. The results of the analyses show that all organic rich rocks of the Permian and Triassic age are in higher catagenetic to metagenetic or even metamorphous stage of thermal transformation (VR 1, 7-2, 7%, vitrinite anisotropy). Organic matter in clastic sedimentary rock of terrestrial origin mostly represented by macerals of vitrinite group. In siliciclastic carbonates vitrinite particles are incorporated in amorphous organic matter while in carbonates amorphous organic matter dominated. Micrinite structure of the amorphous organic matter could be connected with bituminite and its algal-bacterial origin. These rocks are overmature source rock. Regular appearance of pyrobitumen (impsonite) in samples confirm hydrocarbon generation in the past.

Izvorni jezik
Engleski

POVEZANOST RADA