Orogenic exhumation, erosion, and sedimentation in a pro-foreland basin: central Pindos foreland basin, western Greece

Orogenic exhumation, erosion, and sedimentation in a pro-foreland basin: central Pindos foreland basin, western Greece

In western Greece is the Pindos Foreland Basin, a geological depression that contains approximately 2500 m of mainly Upper Eocene to Lower Oligocene submarine fans deposits. Despite the extensive stratigraphic and structural research that has defined the basin as a foreland basin that developed adja...

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Bibliographic Details
Published in:Arabian journal of geosciences 2023, Vol.16 (8), Article 471
Main Authors: Botziolis, Chrysanthos, Maravelis, Angelos G., Pantopoulos, George, Iliopoulos, Ioannis, Iliopoulos, George, Zelilidis, Avraam
Format: Article
Language:eng
Subjects:
Basins
Deep-sea fans
Earth and Environmental Science
Earth science
Earth Sciences
Eocene
Geochemistry
Geologic depressions
History
Oligocene
Ophiolites
Original Paper
Orogeny
Provenance
Sediment
Sediment sources
Sedimentation
Sedimentation & deposition
Sediments
Soil erosion
Stratigraphy
Tectonics
Volcanoes
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Summary:In western Greece is the Pindos Foreland Basin, a geological depression that contains approximately 2500 m of mainly Upper Eocene to Lower Oligocene submarine fans deposits. Despite the extensive stratigraphic and structural research that has defined the basin as a foreland basin that developed adjacent to Pindos Orogen, the impact of orogenic history and erosion on sedimentation has not been evaluated. This study investigates the origin and tectonic setting of the central Pindos Foreland Basin using new provenance data. Petrographic and geochemical analyses suggest that the succession was primarily sourced by sedimentary, felsic, and intermediate igneous, and low-grade metamorphic source rocks. The geochemical analysis reveals that the sediments are immature and have undergone little to moderate weathering, and low degrees of sediment recycling and sorting. A secondary mafic source with high Cr and Ni contents and high Cr/V ratios. The provenance data indicate that Pindos Orogen represents the source region and agree with the existing sedimentological and palaeocurrent research. The Pindos sedimentary and Pelagonian volcano-sedimentary units, mixed with a mafic source (Pindos ophiolitic units) and low grade metamorphics produce the observed chemical and petrographic variance. Multidimensional discrimination diagrams suggest sediment sources from a collisional setting and confirm the active continental edge setting. The provenance data display an up-section increase in lithic fragments, recording the growing history of the Pindos orogen and the gradual exhumation of the source regions. This study offers an example of the sedimentary provenance trend in an evolving pro foreland basin.
ISSN:1866-7511
1866-7538