Geochemical characterization of organic facies in the Dugi Otok basin, the Adriatic sea (Yugoslavia)

Baric, G.; Maričić, M; Radic, Juan Pablo

doi:10.1016/0146-6380(88)90054-x

Cited by 9 publications

(1 citation statement)

References 2 publications

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“…S to poblematiko so se na območju Dinaridov intenzivno ukvarjali že Ogulinec (1952), Gjetvaj in sodelavci (1986), Koščec (1972), Grandie (1974), kasneje pa Šebečič (1979, 1980, 1982, 1984, 1988), Šebečič in Ercego vac (1983), Baričeva (1971Baričeva ( , 1988, Baričeva in sodelavci (1987,1991), Cota in Baričeva Pojavi matičnih kamnin so ugotovljeni na raznih delih Jadranske karbonatne platforme (Barič, 1971(Barič, , 1988Barič et al, 1987Barič et al, , 1991Cota & Baric, 1977). Kot dobre matične kamnine so izločeni karbonatni paketi spodnje in zgornjekredne staro sti iz bazena Dugega otoka.…”

Section: Razprava In Sklepiunclassified

Carbonate rocks of west Slovenia as potential sources for hydrocarbons

Ogorelec¹,

Jurkovšek²,

Šatara³

et al. 1996

Geologija

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Kratka vsebinaRaziskave zajemajo okolje nastanka in litološke značilnosti ter geokemične in optično-mikroskopske analize organske snovi 196 vzorcev apnencev in dolomitov iz zahodnega dela slovenskih Dinaridov. Dobljeni rezultati so zazdaj orientacijski. Analiziranih je bilo 14 potencialnih formacij različnih starosti, od zgornjega perma do paleocena. Triasne in jurske kamnine vsebujejo v povprečju 0,2 % C in niso potencialne za nastanek nafte in plina. Več vsebujejo zgornjepermsKi in karnijski apnenci, neugodna v njih pa je sestava kerogena, ker je ta pretežno terestričnega izvora. Med deloma potencialne matične kamnine lahko izločimo spodnjekredne črne apnence lagunskega faciesa s Trnovega pri Novi Gorici. Črni ploš-časti in laminirani Komenski in Tomajski apnenec ter plasti Liburnijske formacije kažejo sicer mejne vsebnosti C^^^, imajo pa neugodno sestavo kerogena. AbstractThe research comprises depositional evironment and lithological characteris tics as well as geochemical and optical analyses of 196 limestone and dolomite samples from Upper Permian to Paleocene age from the western part of Slovenian Dinarides. The obtained results of 14 investigated formations are orientational. Triassic and Jurassic rocks contain 0.2 % C in average and are not potential source rocks for hydrocarbons. The Upper Permian and Carnian beds contain more CQj.g, but vitrinite constituent of terrestrial origin is unfavorable for the keroSoavtorji se bomo vedno spominjali našega prijatelja in kolega Bore, ki je preminil pred koncem redakcije tega dela.

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Section: Razprava In Sklepiunclassified

Carbonate rocks of west Slovenia as potential sources for hydrocarbons

Ogorelec¹,

Jurkovšek²,

Šatara³

et al. 1996

Geologija

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Changing depositional environments in the semi-restricted Late Jurassic Lemeš Basin (Outer Dinarides; Croatia)

Vitzthum

Gawlick

Sachsenhofer

et al. 2021

Facies

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The up to 450 m-thick Upper Jurassic Lemeš Formation includes organic-rich deep-water (max. ~ 300 m) sedimentary rocks deposited in the Lemeš Basin within the Adriatic Carbonate Platform (AdCP). The Lemeš Formation was investigated regarding (1) bio- and chemostratigraphy, (2) depositional environment, and (3) source rock potential. A multi-proxy approach—microfacies, Rock–Eval pyrolysis, maceral analysis, biomarkers, and stable isotope ratios—was used. Based on the results, the Lemeš Formation is subdivided from base to top into Lemeš Units 1–3. Deposition of deep-water sediments was related to a late Oxfordian deepening event causing open-marine conditions and accumulation of radiolarian-rich wackestones (Unit 1). Unit 2, which is about 50 m thick and Lower early Kimmeridgian (E. bimammatum to S. platynota, ammonite zones) in age, was deposited in a restricted, strongly oxygen-depleted basin. It consists of radiolarian pack- and grainstones with high amounts of kerogen type II-S organic matter (avg. TOC 3.57 wt.%). Although the biomass is predominantly marine algal and bacterial in origin, minor terrestrial organic matter that was transported from nearby land areas is also present. The overlying Unit 3 records a shallowing of the basin and a return to oxygenated conditions. The evolution of the Lemeš Basin is explained by buckling of the AdCP due to ophiolite obduction and compressional tectonics in the Inner Dinarides. Lemeš Unit 2 contains prolific oil-prone source rocks. Though thermally immature at the study location, these rocks could generate about 1.3 t of hydrocarbon per m2 surface area when mature.

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