Naslov
Lithofacies and Biofacies of the Cretaceous and Paleogene Carbonate Sediments in Kate-1 offshore well (Kornati Area, Croatia, Adriatic Sea)

Autori
Veseli, Vladimir ; Tišljar, Josip ; Tadej, Jasna ; Premec-Fuček, Vlasta

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

Izvornik
Abstracts - The second International Symposium on the Adriatic Carbonate Platform / Velić, Ivo ; Vlahović, Igor - Zagreb : Institute of Geology, Zagreb, 1991, 115-115

Skup
The second International Symposium on the Adriatic Carbonate Platform: Relations with adjacent regions

Mjesto i datum
Zadar, Hrvatska, 12.05.1991. - 18.05.1991

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Lithofacies; Biofacies; Cretaceous; Paleogene; Carbonate Sediments; offshore well Kate-1; Adriatic Sea; Adriatic Carbonate Platform

Sažetak
The Kate-1 exploratory well has penetrated Middle and Lower Eocene (1998-2412 m), Upper Santonian (2412-3234 m), Turonian-Lower Santonian (3312-4370 m), Upper Cenomanian (4370-4440 m), Cenomanian (4740-5110 m), Upper (5110-5640 m) and Lower Albian (5640-5920 m) and finally the Lower Aptian deposits (5920-5968m + xm. During the Early Aptian, patch reef and biostromal limestones were deposited, followed by gradual shallowing and emersion reaching its maximum by the end of the Aptian. The emersion phase lasted throughout the Late Aptian and possibly the lower part of the Albian. During the Albian, sedimentation took place in restricted shoals and/or lagoonal environment, whereas towards the end of the Late Albian little restricted lagoons were formed, with anoxic characteristics, and supratidal environments with early diagenetic dolomites. During the Early and Middle Cennomanian, lagoonal and shallow subtidal sedimentation was renewed, while extensive shoals with high water energy, inhabited destruction of collonial organisms (bioherms), occured by the end of Cenomanian.Those organisms produced large amounts of coquina and coquinite limestone. Due to eustatic and vertical tectonic movements during the Early Turonian, the greater part of the carbonate platform was deepended and environments with characteristics of open and drowned platform were created. Limestones made up of micrites, fine rudist particles and oligosteginids were deposited. During the Late Turonian and Early Santonian, restricted shoals and lagoonal environmsnts were renewed with periodical shallowing up to intertidal. By the middle of the Senonian, general transgression occured whereby sedimentary conditions were created similat to those in the Early Turonian (oligostegina limestones). By the end of the Senonian, due to the renewed intensive shallowing, the sedimentation occured mostly in lagoons and shoals with agile water, and sporadic formation of rudist bioherms. The shallowing reaches its maximum with succesive change of fresh water by the end of the Late Senonian when emersion, paleokarstification and corrosion occured and Microcodium forms were formed. A new transgression took place in the Early Eocene, accompanied by the deposition of shallow-water and deeper subtidal (carbonate platform slope or ramp) limestones succeeded by nummulite-discocyclina-bearing limestones.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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