TY - JOUR
T1 - Late Quaternary mud-dominated, basin-floor sedimentation of the Gulf of Corinth, Greece
T2 - Implications for deep-water depositional processes and controls on syn-rift sedimentation
AU - Gawthorpe, Rob L.
AU - Fabregas, Natacha
AU - Pechlivanidou, Sofia
AU - Ford, Mary
AU - Collier, Richard E.Ll
AU - Carter, Gareth D.O.
AU - McNeill, Lisa C.
AU - Shillington, Donna J.
N1 - Funding Information:
We sincerely thank all involved with the successful completion of IODP Expedition 381, including ECORD Science Operator staff, ship and drilling crew of the D/V Fugro Synergy, and staff at MARUM, University of Bremen. We thank John H (Harri) Wyn Williams for preparing polished thin sections, Irene Heggstad for electron microscopy, Leif-Eric Pedersen, Yuval Ronen and Jenny Maccali for preparation and analysis of aragonite samples for dating. Joe Macquaker and Tom Dodd are thanked for insightful discussions about mud and turbidites respectively. The authors acknowledge support from the Research Council of Norway (DeepRift project; number 308805). RLG thanks the VISTA programme of Norwegian Academy of Science and Letters for the award of the VISTA Professorship which also provided support to SP to participate in IODP Expedition 381 and undertake post-cruise research. RELlC acknowledges NERC for grant NE/S002367/1 for supporting post-cruise research. We thank Peter Burgess for editorial guidance and reviewers Peter Haughton and Bonita Barrett for insightful reviews that improved the manuscript.
Funding Information:
We sincerely thank all involved with the successful completion of IODP Expedition 381, including ECORD Science Operator staff, ship and drilling crew of the D/V Fugro Synergy, and staff at MARUM, University of Bremen. We thank John H (Harri) Wyn Williams for preparing polished thin sections, Irene Heggstad for electron microscopy, Leif‐Eric Pedersen, Yuval Ronen and Jenny Maccali for preparation and analysis of aragonite samples for dating. Joe Macquaker and Tom Dodd are thanked for insightful discussions about mud and turbidites respectively. The authors acknowledge support from the Research Council of Norway (DeepRift project; number 308805). RLG thanks the VISTA programme of Norwegian Academy of Science and Letters for the award of the VISTA Professorship which also provided support to SP to participate in IODP Expedition 381 and undertake post‐cruise research. RELlC acknowledges NERC for grant NE/S002367/1 for supporting post‐cruise research. We thank Peter Burgess for editorial guidance and reviewers Peter Haughton and Bonita Barrett for insightful reviews that improved the manuscript.
Publisher Copyright:
© 2022 International Association of Sedimentologists and European Association of Geoscientists and Engineers and John Wiley & Sons Ltd.
PY - 2022/10
Y1 - 2022/10
N2 - Syn-rift deep-water muds and mudstones preserve a relatively complete stratigraphic record of tectonic and climatic events. This paper investigates mud-dominated deposits and stratigraphy using core from International Ocean Discovery Program (IODP) Expedition 381 sites M0078 and M0079 in the Gulf of Corinth, Greece. Millimetre-scale logging defined several bed types: homogeneous and laminated mud beds, bioturbated beds, a variety of graded beds, and rare matrix-supported conglomerates and slumps. Homogeneous muds and light grey to black laminated muds record deposition from distal, waning low density turbidity currents and terminal mud-rich quasi-laminar or laminar plug flows. Graded beds, interpreted as turbidites, range from beds several millimetre to a few centimetres of mud with silt to fine sand bases, to metre-scale mud beds with coarser sand and pebble bases. Conglomerate and slumped beds record cohesive debris flows, transitional flows and slope failure. Three stratal package types are distinguished: bioturbated, bedded and laminated, recording distinct hydrological conditions. Bioturbated packages record interglacial marine conditions with well oxygenated waters. Bedded packages record hemipelagic processes and low energy density underflows in a mainly dysoxic, stratified, lacustrine setting (glacial phases). In laminated packages, white mm-scale laminae of calcite or aragonite from varved, hemipelagic sediments demonstrating seasonal variability in a dysoxic non-marine or transitional setting. Rift stratigraphy is linked to eustatically controlled connections to the global ocean across rift segment boundaries. The ca. 780 to 330 ka succession is dominated by laminated packages with thin bioturbated packages and distinct conglomerates and slumps, suggesting high sills, making ocean connections brief and transitional to lacustrine conditions prolonged. The ca. 330 ka to present succession shows well developed bioturbated and bedded packages, separated by thin laminated packages, suggesting brief transitions and well-developed marine conditions due to lower sills. Results indicate that structurally controlled rift segment boundaries exert a first-order control on syn-rift stratigraphic evolution, with fault segment growth and linkage driving intra-rift facies and sequence variability.
AB - Syn-rift deep-water muds and mudstones preserve a relatively complete stratigraphic record of tectonic and climatic events. This paper investigates mud-dominated deposits and stratigraphy using core from International Ocean Discovery Program (IODP) Expedition 381 sites M0078 and M0079 in the Gulf of Corinth, Greece. Millimetre-scale logging defined several bed types: homogeneous and laminated mud beds, bioturbated beds, a variety of graded beds, and rare matrix-supported conglomerates and slumps. Homogeneous muds and light grey to black laminated muds record deposition from distal, waning low density turbidity currents and terminal mud-rich quasi-laminar or laminar plug flows. Graded beds, interpreted as turbidites, range from beds several millimetre to a few centimetres of mud with silt to fine sand bases, to metre-scale mud beds with coarser sand and pebble bases. Conglomerate and slumped beds record cohesive debris flows, transitional flows and slope failure. Three stratal package types are distinguished: bioturbated, bedded and laminated, recording distinct hydrological conditions. Bioturbated packages record interglacial marine conditions with well oxygenated waters. Bedded packages record hemipelagic processes and low energy density underflows in a mainly dysoxic, stratified, lacustrine setting (glacial phases). In laminated packages, white mm-scale laminae of calcite or aragonite from varved, hemipelagic sediments demonstrating seasonal variability in a dysoxic non-marine or transitional setting. Rift stratigraphy is linked to eustatically controlled connections to the global ocean across rift segment boundaries. The ca. 780 to 330 ka succession is dominated by laminated packages with thin bioturbated packages and distinct conglomerates and slumps, suggesting high sills, making ocean connections brief and transitional to lacustrine conditions prolonged. The ca. 330 ka to present succession shows well developed bioturbated and bedded packages, separated by thin laminated packages, suggesting brief transitions and well-developed marine conditions due to lower sills. Results indicate that structurally controlled rift segment boundaries exert a first-order control on syn-rift stratigraphic evolution, with fault segment growth and linkage driving intra-rift facies and sequence variability.
KW - Gulf of Corinth
KW - IODP Expedition 381
KW - Quaternary
KW - hemipelagites
KW - mud
KW - normal fault
KW - rift
KW - sea-level change
KW - turbidites
UR - http://www.scopus.com/inward/record.url?scp=85129708490&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85129708490&partnerID=8YFLogxK
U2 - 10.1111/bre.12671
DO - 10.1111/bre.12671
M3 - Article
AN - SCOPUS:85129708490
SN - 0950-091X
JO - Basin Research
JF - Basin Research
ER -