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The Jurassic ophiolitic melange in the NE Dinarides: Dating, internal structure and geotectonic implications (CROSBI ID 102449)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Babić, Ljubomir ; Hochuli, Peter A. ; Zupanič, Jožica The Jurassic ophiolitic melange in the NE Dinarides: Dating, internal structure and geotectonic implications // Eclogae geologicae Helveticae, 95 (2002), 263-275-x

Podaci o odgovornosti

Babić, Ljubomir ; Hochuli, Peter A. ; Zupanič, Jožica

engleski

The Jurassic ophiolitic melange in the NE Dinarides: Dating, internal structure and geotectonic implications

A chaotic complex (Repno Complex) exposed in the Inner Dinarides, NW Croatia, consists of a mixture of magmatic and sedimentary rocks in a dark shaly matrix. It exhibits the typical features of ophiolitic melanges originating from subduction and accretionary processes. An Early Jurassic to Bajocian age of the fine-grained terrigenous sediments, now composing the shale matrix, is documented by palynomorph assemblages. Continental source areas with "eastern" affinities are envisaged for the shale matrix. The included bodies, millimetric to kilometric in size, consist of sandstones, cherts, red shales, pyroclastics, basalts, gabbro and ultramafics. The shale matrix shows a characteristic scaly cleavage. The preservation of the various inclusions depends on their rheological behaviour during accretion/subduction processes. The most mobile components were the fine-grained terrigenous sediments now represented by the shaly matrix. Subduction processes and formation of the melange developed between the Middle Jurassic and the Hauterivian. The relevant ocean segment was presumably closed before the Barremian. It is suggested that the Meliata, Repno and Central Dinaric oceanic domains were parts of the single ocean belt neighbouring the Adria.

Ophiolitic melange; accretionary wedge; Jurassic; biostratigraphy; palynology; geotectonics; Dinarides

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Podaci o izdanju

95

2002.

263-275-x

objavljeno

0012-9402

Povezanost rada

Geologija

Indeksiranost