The Mesohellenic trough and the Thrace Basin. Two Tertiary molassic Basins in Hellenides: do they really correlate?

Κίλιας, Αδαμάντιος; Vamvaka, Agni; Falalakis, G.; Sfeikos, A.; Papadimitriou, Eleftheria; Gkarlaouni, Ch.; Καρακώστας, Β. Γ.

doi:10.12681/bgsg.11082

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…The study area is characterised by a complex alpine tectonic deformation as a result of many tectonic events that have affected the described geological formations of the area [32,45,46]. A complete view is given below (Figure 4).…”

Section: Alpine Tectonicsmentioning

confidence: 99%

The Geological Structure and Tectonic Complexity of Northern Thessaly That Hosted the March 2021 Seismic Crisis

Sboras

Pavlides²,

Κίλιας³

et al. 2022

Geotechnics

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Knowing the rich presence of active faults in northern Thessaly and the lack of any significant seismic activity since at least the mid-1940s, the 2021 seismic sequence did not surprise us. What did surprise us was the fact that (i) despite the great knowledge of the neotectonic faults in the area, the causative faults were unknown, or almost unknown; (ii) the direction of the 2021 faulting was different than the expected, and given that the focal mechanisms showed almost pure normal dip-slip motion, the extensional main axis was also different than the one we thought we knew for this area; and (iii) besides the co-seismic ruptures that occurred within the Domeniko-Amouri basin and along the Titarissios River valley, there is evidence of rupturing in the alpine basement of Zarkos mountains. After thoroughly reviewing both the alpine and neotectonic structural setting and all the available literature concerning the seismotectonic data and interpretations of the 2021 sequence, including investigations of our own, we end up in a complex tectonic setting with older alpine structures now operating as inherited faults, and we also suggest the possible occurrence of a roughly N-dipping, low-angle, detachment-type fault. This fault runs below Mt Zarkos, reaching at least the Elassona Basin, with splay faults bifurcating upwards from the main fault zone. Following this complexity, rupture of the first mainshock must have chosen a split route reaching the surface through the gneiss rocks of Zarkos and almost (?) reaching the basinal sediments of the local tectonic depressions. This seismic sequence is a perfect case study to shed some light on the tectonic and rupture processes in the context of both geodynamics and seismic hazard assessment.

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Section: Alpine Tectonicsmentioning

confidence: 99%

The Geological Structure and Tectonic Complexity of Northern Thessaly That Hosted the March 2021 Seismic Crisis

Sboras

Pavlides²,

Κίλιας³

et al. 2022

Geotechnics

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“…Taking into account the available published data 36 , 41 – 44 , 46 , 48 – 50 and in situ observations, a suitable candidate area for sample representativeness was considered to be across the central–northern part of the MHB, where the basin has its greatest development both in width and depth ( Figure 1 ). Three main MHB formations occur in this area: Eptachori, Pentalofos and Tsotyli.…”

Section: Methodsmentioning

confidence: 99%

Progress for carbon dioxide geological storage in West Macedonia: A field and laboratory-based survey

Tyrologou¹,

Vamvaka²,

Koukouzas³

et al. 2023

Open Res Europe

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Background: It is widely acknowledged that carbon dioxide (CO2), a greenhouse gas, is largely responsible for climatic changes that can lead to warming or cooling in various places. This disturbs natural processes, creating instability and fragility of natural and social ecosystems. To combat climate change, without compromising technology advancements and maintaining production costs at acceptable levels, carbon capture and storage (CCS) technologies can be deployed to advance a non-disruptive energy transition. Capturing CO2 from industrial processes such as thermoelectric power stations, refineries, and cement factories and storing it in geological mediums is becoming a mature technology. Part of the Mesohellenic Basin, situated in Greek territory, is proposed as a potential area for CO2 storage in saline aquifers. This follows work previously done in the StrategyCCUS project, funded by the EU. The work is progressing under the Pilot Strategy, funded by the EU. Methods: The current investigation includes geomechanical and petrophysical methods to characterise sedimentary formations for their potential to hold CO2 underground. Results: Samples were found to have both low porosity and permeability while the corresponding uniaxial strength for the Tsotyli formation was 22 MPa, for Eptechori 35 MPa and Pentalofo 74 MPa. Conclusions: The samples investigated indicate the potential to act as cap-rocks due to low porosity and permeability, but fluid pressure within the rock should remain within specified limits; otherwise, the rock may easily fracture and result in CO2 leakage or/and deform to allow the flow of CO 2. Further investigation is needed to identify reservoir rocks as well more sampling to allow for statistically significant results.

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“…The Mesohellenic Trough (MHT) is an elongated, NNW-SSE trending sedimentary basin, located between the Pelagonian and the Apulian geotectonic zones of Greece [8]. Its structural history is still controversial, yet most authors, such as those of [9,10], have agreed to a piggy-back type of basin with a lithostratigraphy dominated by turbiditic deposits, covered by Paleogene-to Neogene-aged, shallow-to-deep water molassic sediments [11][12][13][14].…”

Section: Mesohellenic Troughmentioning

confidence: 99%

Assessing Natural Gas Versus CO2 Potential Underground Storage Sites in Greece: A Pragmatic Approach †

Makri¹,

Bellas²,

Gaganis

2022

International Conference on Raw Materials and Circular Economy

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Although subsurface traps have been regularly explored for hydrocarbon exploration, natural gas and CO2 storage has drawn industrial attention over the past few decades, thanks to the increasing demand for energy resources and the need for greenhouse gas mitigation. With only one depleted hydrocarbon field in Greece, saline aquifers, salt caverns and sedimentary basins ought to be evaluated in furtherance of the latter. Within this study the potential of the Greek subsurface for underground storage is discussed. An overview and re-evaluation of the so-far studied areas is implemented based on the available data. Lastly, a pragmatic approach for the storage potential in Greece was created, delineating gaps and risks in the already proposed sites. Based on the above details, a case study for CO2 storage is presented, which is relevant to the West Katakolo field saline aquifer.

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The Mesohellenic trough and the Thrace Basin. Two Tertiary molassic Basins in Hellenides: do they really correlate?

Abstract: Based on lithostratigraphic and structural data, as well as geological mapping, the mollasic Thrace Basin (ThB) in NE Greece (including the Paleogene deposits of the Axios Basin) was compared with the Mesohellenic Trough (MHT) in NW Greece

Cited by 5 publications

References 20 publications

The Geological Structure and Tectonic Complexity of Northern Thessaly That Hosted the March 2021 Seismic Crisis

The Geological Structure and Tectonic Complexity of Northern Thessaly That Hosted the March 2021 Seismic Crisis

Progress for carbon dioxide geological storage in West Macedonia: A field and laboratory-based survey

Assessing Natural Gas Versus CO2 Potential Underground Storage Sites in Greece: A Pragmatic Approach †

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