Affiliation:
1. Department of Structural, Historical and Applied Geology, Aristotle University, Thessaloniki, GR-54124, Greece
2. Department for Applied Geosciences and Geophysics, Mοntanuniversitaet, Leoben, A-8700, Austria
Abstract
Microfacies analysis and conodont dating on carbonates associated with the Vourinos-Pindos ophiolite emplacement on the Pelagonian unit in northern Greece, combined with structural analysis, enhance our understanding of the palaeogeography and geotectonic evolution of the Hellenides. We focus on a dismembered Triassic Hallstatt Limestone succession incorporated as blocks in the Middle-Late Jurassic Avdella ophiolitic mélange, which is identical to a Triassic succession in the western Pindos (Hallstatt/Pindos succession). Initially, the Hallstatt/Pindos succession was deposited on the outer shelf along the eastern Pelagonian margin and later incorporated into the mélange during west-directed obduction processes.
During the Middle to early Late Jurassic, ophiolites obducted on the eastern Pelagonian margin, resulting in a nappe stack in front of the ophiolites in the lower plate position. Newly formed trench-like basins in front of the advancing nappe stack became filled with sedimentary mélanges, consisting of ophiolitic material mixed with blocks from the Hallstatt/Pindos succession, deposited in an outer shelf position. Subsequently, the Pindos ophiolites overthrust their foreland basin, forming a typical ophiolitic mélange (Avdella mélange). Consequently, the Triassic-Middle Jurassic Hallstatt/Pindos succession represents a far-traveled Middle-Late Jurassic nappe deriving east of the Pelagonian unit, which was bulldozed westward in front of the west-directed obducting Neotethys ophiolites.
Thematic collection:
This article is part of the Ophiolites, melanges and blueschists collection available at:
https://www.lyellcollection.org/topic/collections/ophiolites-melanges-and-blueschists
Publisher
Geological Society of London
Cited by
2 articles.
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