Neogene to Quaternary rifting, sedimentation and uplift in the Corinth Basin,Greece

Collier, Richard E. Ll.; Dart, Chris

doi:10.1144/gsjgs.148.6.1049

Cited by 111 publications

(132 citation statements)

References 28 publications

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“…In addition to the long piston cores, a series of shallow piston, box, and gravity cores were recovered from within the Gulf of Corinth and the Alkyonides Gulf, sampling the upper few meters below seafloor (e.g., Collier et al, 2000;Lykousis et al, 2007). Onshore exposures of the earlier synrift sequences provide examples of analogs of some of the lithologies and facies likely to be encountered in the offshore rift (e.g., Collier and Dart, 1991;Dart et al, 1994;Ford et al, 2007Ford et al, , 2013Rohais et al, 2007).…”

Section: Previous Drillingmentioning

confidence: 99%

Expedition 381 Scientific Prospectus: Corinth Active Rift Development

McNeill¹,

Shillington²,

Carter³

2017

International Ocean Discovery Program Scientific Prospectus

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Continental rifting is fundamental for the formation of ocean basins, and active rift zones are dynamic regions of high geohazard potential. However, much of what we know from the fault to plate scale is poorly constrained and is not resolved at any level of spatial or temporal detail over a complete rift system. For International Ocean Discovery Program Expedition 381, we propose drilling within the active Corinth rift, Greece, where deformation rates are high, the synrift succession is preserved and accessible, and a dense, seismic database provides high-resolution imaging, with limited chronology, of the fault network and of seismic stratigraphy for the recent rift history. In Corinth, we can therefore achieve an unprecedented precision of timing and spatial complexity of rift-fault system development and rift-controlled drainage system evolution in the first 1-2 My of rift history. We propose to determine at a high temporal and spatial resolution how faults evolve, how strain is distributed, and how the landscape responds within the first few million years in a nonvolcanic continental rift, as modulated by Quaternary changes in sea level and climate. High horizontal spatial resolution (1-3 km) is provided by a dense grid of seismic profiles offshore that have been recently fully integrated and are complemented by extensive outcrops onshore. High temporal resolution (~20-50 ky) will be provided by seismic stratigraphy tied to new core and log data from three carefully located boreholes to sample the recent synrift sequence.Two primary themes are addressed by the proposed drilling integrated with the seismic database and onshore data. First, we will examine fault and rift evolutionary history (including fault growth, strain localization, and rift propagation) and deformation rates. The spatial scales and relative timing can already be determined within the seismic data offshore, and dating of drill core will provide the absolute timing offshore, the temporal correlation to the onshore data, and the ability to quantify strain rates. Second, we will study the response of drainage evolution and sediment supply to rift and fault evolution. Core data will define lithologies, depositional systems and paleoenvironment (including catchment paleoclimate), basin paleobathymetry, and relative sea level. Integrated with seismic data, onshore stratigraphy, and catchment data, we will investigate the relative roles and feedbacks between tectonics, climate, and eustasy in sediment flux and basin evolution. A multidisciplinary approach to core sampling integrated with log and seismic data will generate a Quaternary chronology for the synrift stratigraphy down to orbital timescale resolutions and will resolve the paleoenvironmental history of the basin in order to address our objectives.

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Section: Previous Drillingmentioning

confidence: 99%

Expedition 381 Scientific Prospectus: Corinth Active Rift Development

McNeill¹,

Shillington²,

Carter³

2017

International Ocean Discovery Program Scientific Prospectus

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“…1). Dating from uplifted syn-rift sediments covering the northern Peloponnese suggests that the rifting initiated around 5 Ma ago (Kontopoulos and Doutsos, 1985;Collier and Dart, 1991). Since 1.8-1.5 Ma, the deformation migrated northward, in parallel with an increase of the extension rate (Ori, 1989;Sorel, 2000;Rohais et al, 2007;Ford et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Active faulting at the western tip of the Gulf of Corinth, Greece, from high-resolution seismic data

et al. 2015

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International audienceThe Gulf of Corinth is one of the fastest-spreading intra-continental rifts on Earth. GPS data indicate that the rift is currently opening in a NNE-SSW direction, with a rate of extension reaching up to 16 mm yr (super - 1) in its westernmost part. Although the rest of the offshore rift has been well studied, the western tip of the rift is still poorly explored. We present an accurate map of submarine faults in this area based on two high-resolution seismic reflection surveys (single-channel sparker). In the eastern part of the studied area, the sedimentary infill is affected by the known North Eratini, South Eratini, and West Channel faults. Further to the west, the seafloor is mostly flat and is bounded to the north by the normal, south-dipping, Trizonia fault. To the north, the shallower part of the Gulf shows to the east a diffuse pattern of normal and strike-slip deformation, which is replaced to the west by a 7.5 km long SE striking strike-slip fault zone, called the Managouli fault zone. To the westernmost tip of the Gulf, in the Nafpaktos Basin, two fault sets with different strikes are encountered; the one with a NE-SW strike exhibits a clear strike-slip component. The western tip of the Gulf of Corinth is the only part of the Corinth Rift where convincing evidence for strike-slip movement has been found. This fault pattern is likely related to the complex deformation occurring at the diffuse junction at the western tip of the Rift between three crustal blocks: Continental Greece, Peloponnese, and the Ionian Island-Akarnania block

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“…The synrift formations comprise a stratigraphic sequence of probable Pliocene age, referred to as the Asprohomata-Kalamonas formation, by Gaitanakis et al, 1985), equivalent to the Charalampos marl formation (CMF) of Collier and Dart's (1991). According to the latter, the formation consists of calcareous mudstones and siltstones, with channelized sandstone bodies in its northern part and a general coarsening trend towards the north-east, indicating a paleoflow towards the south.…”

Section: Geological Settingmentioning

confidence: 99%