Naslov
Inconsistent tectonic trends, consistent paleomagnetic directions: an example from External Dinarides

Autori
Márton, Emő ; Ćosović, Vlasta

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

Izvornik
13th Workshop on Alpine Geological Studies / Šarič, Kristina ; Prelević, Dragan ; Sudar, Milan ; Cvetković, Vladica - Beograd : University of Belgrade, Faculty of Mining and Geology, 2017, 64-64

ISBN
978-86-7352-297-5

Skup
13th Workshop on Alpine Geological Studies

Mjesto i datum
Zlatibor, Srbija, 07.09.2017. - 18.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Jurassic, Cretaceous, Central Dalmatian Islands, paleomagnetic direction, CCW rotation

Sažetak
The Central Dalmatian islands between Split and Dubrovnik are of special interest, since their orientations and structural trends are WNW-ESE, instead of the general NW-SE Dinaric trend. For this reason we made an extensive paleomagnetic study on more than 600 oriented cores from 43 localities. The samples represent shallow-water platform carbonates of Lower Cretaceous through Campanian in age from Mljet, Korčula and Hvar islands and also Upper Jurassic age from Mljet island. Hand samples were taken for biostratigraphic determination from the sampled beds in the outcrops. Based on the stratigraphic ages a Campanian – Santonian (only Hvar island), a Cenomanian – Turonian (all islands), an Aptian – Albian plus a Tithonian – Barremian (Mljet and Korčula islands) paleomagnetic overall mean directions could be defined. For the first two groups positive tilt test constrained the age of the magnetizations as of pretilting age, for the last two the tilt test is indeterminate. Earlier published coeval paleomagnetic directions from the Northern Adriatic islands and Vis (Márton et al., 2014) suggest exactly the same magnitude of CCW rotation as the islands of the present study, at least from the Cenomanian on. Thus, the above mentioned difference in tectonic trends can not be attributed to differential mass rotations, but considered e.g. as the consequence of deformations at different times (Korbar, 2009).

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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