Structural Analysis of the Coal-Bearing Kleidi Basin: Insights in Kinematics of the Broader Ptolemais Sedimentary Basin (Western Macedonia, Greece)

This study processes borehole data from the coal-bearing Kleidi basin (Ptolemais sedimentary basin, Western Macedonia, Greece) to unravel the timeline of the neotectonic configuration of the basin and correlate it with the neotectonics of the broader region. Coal (lignite) deposits preserve faulted...

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Bibliographic Details
Published in:Geotectonics 2022-04, Vol.56 (2), p.200-211
Main Authors: Athanassas, C. D., Ntokos, D., Roumpos, C.
Format: Article
Language:English
Subjects:
Algorithms
Boreholes
Coal
Configurations
Data acquisition
Deformation
Earth and Environmental Science
Earth Sciences
Kinematics
Lignite
Miocene
Neogene
Neotectonics
Pliocene
Quaternary
Sedimentary basins
Stratigraphy
Structural analysis
Structural Geology
Thickness
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Summary:This study processes borehole data from the coal-bearing Kleidi basin (Ptolemais sedimentary basin, Western Macedonia, Greece) to unravel the timeline of the neotectonic configuration of the basin and correlate it with the neotectonics of the broader region. Coal (lignite) deposits preserve faulted sequences, and for this reason they are ideal locations for studying deformation patterns. Lithostratigraphic data acquired by previous investigations revealed a continuous stratigraphic sequence which spans from the Upper Miocene to the Middle Quaternary. These Neogene deposits demonstrate their maximum thickness towards the SE of the basin. Boreholes also revealed that in the subsurface, the basin is actually divided into two separate grabens on either side of a ridge of the alpine basement. Stratigraphic interpolations using the inverse distance algorithm-generated thickness rasters which, through successive derivation, allowed the discovery of normal faults. Repetition of the algorithm using the new structural constraints returned patterns of deformation in the southern part of the Kleidi basin different from those revealed in the northern part. The configuration of the southern part of the Kleidi basin seems to reflect the Late Miocene–Pliocene extensional event. In contrast, configuration of the northern part of the basin is compatible with a later extensional phase in Pliocene‒Quaternary. Both events are manifested in the tectonostratigraphy of the Ptolemais sedimentary basin and the broader area.
ISSN:0016-8521
1556-1976
DOI:10.1134/S0016852122020078