Detrital pyroxenes in the Eocene flysch of the Istrian Basin (Slovenia, Croatia)
Lenaz, Davide (Università degli Studi di Trieste)

Date:	2008
Abstract:	For the first time, few detrital augite and pigeonite crystals have been found in the Eocene flysch basins of Istria (Trieste-Koper basin; Italy, Slovenia, Croatia) and Krk Island (Croatia). Their chemistry suggests that they are related to subalkaline rocks (within-plate tholeiites) crystallized at a pressure between 0 and 5 kbar. As a possible source, the nearby basaltic andesites of Ljubac have been taken into consideration. The argument for a ?Late Tertiary age of the Ljubac volcanics is that no detrital pyroxenes have been found in the Eocene flysch and Oligo- Miocene molasse deposits of the area (Lugovic et al. , 1998). Radiometric data are not available until now. The detection of detrital pyroxene could be an indication of an older age of the Ljubac volcanics. The presence of similar pyroxenes in the Trieste-Koper and the Krk Island flysch and their absence in Brkini flysch suggest that the basin of Krk was linked with the Istrian basin rather than the Brkini basin.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Provenance analysis ; Heavy mineral analysis ; Clinopyroxene geochemistry ; Istria peninsula ; Adria plate
Published in:	Geologica acta, Vol. 6, Núm. 3 (Setembre 2008) , p. 259-266, ISSN 1696-5728

Adreça alternativa: https://raco.cat/index.php/GeologicaActa/article/view/129715
Adreça alternativa: https://revistes.ub.edu/index.php/GEOACTA/article/view/105.000000255
DOI: 10.1344/105.000000255

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