Characterization of overbanking features on the lower reach of the Gioia-Mesima canyon-channel system (southern Tyrrhenian Sea) through integration of morpho-stratigraphic data and physical modelling.
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| Title: | Characterization of overbanking features on the lower reach of the Gioia-Mesima canyon-channel system (southern Tyrrhenian Sea) through integration of morpho-stratigraphic data and physical modelling. |
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| Authors: | Casalbore, Daniele1 daniele.casalbore@uniroma1.it, Falcini, Federico1, Martorelli, Eleonora1, Morelli, Eleonora1, Bosman, Alessandro1, Calarco, Marilena1, Chiocci, Francesco Latino1 |
| Source: | Progress in Oceanography. Dec2018, Vol. 169, p66-78. 13p. |
| Subjects: | Submarine valleys, Turbidity currents, Multibeam mapping, Stratigraphic geology, Continental slopes |
| Abstract: | Highlights • The recent morpho-stratigraphic setting of the GMS is reconstructed. • Turbidity currents interact with a complex morphology. • Erosive-depositional features are mostly related to overflow processes. Abstract The collection of high-resolution multibeam bathymetry, single-channel seismic profiles, TOBI side scan sonar data, and gravity cores allowed the characterization of the main morpho-sedimentary processes acting along the lower reach of the shelf-indenting Gioia-Mesima canyon-channel system (GMS) and the surrounding continental slope (southern Tyrrhenian Sea). This last area, developing across a depth range of 1000–1700 m, shows a complex morphology due to the interaction between downslope gravitative processes (mainly turbidite sheet flows) and abrupt changes in slope gradients related to tectonically-controlled scarps. Particularly, several erosive-depositional features (levee deposits, sediment undulations, channels) have been related to overflow processes from the northern flank of the GMS, although the lower reach of the GMS is characterized by strong entrenchment (canyon height ranging from 120 to 270 m) and low sinuosity. Morphological and seismic stratigraphy data indicate that the distribution and dimension of these features vary in response both to the proximity to the external levee of the GMS and to the topographic gradient of the lower continental slope. Particularly, we were able to discriminate between a gently sloping sector (on average 1.5°) dominated by sedimentary bypass of the turbidity currents and a steeper sector (about 3°), where the erosional capability of these currents seems to increase. Indeed, three channels, 4,3–6,5 km long and up to 20 m deep, incise this steeper sector, running parallel to each other at a distance of 1250–1500 m. To support the capability of overbanking flow in producing these channels, we used a physical model for the ignition of turbidity currents that provides realistic values for the ignitive state of the overbanking turbidity flows. More generally, the methodological approach used in this study may be useful to provide constraints on the genesis and evolution of erosive-depositional features in other tectonically-controlled margins, where sedimentary gravity flows interact with an uneven morphology. [ABSTRACT FROM AUTHOR] |
| Copyright of Progress in Oceanography is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 133439566 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Characterization of overbanking features on the lower reach of the Gioia-Mesima canyon-channel system (southern Tyrrhenian Sea) through integration of morpho-stratigraphic data and physical modelling. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Casalbore%2C+Daniele%22">Casalbore, Daniele</searchLink><relatesTo>1</relatesTo><i> daniele.casalbore@uniroma1.it</i><br /><searchLink fieldCode="AR" term="%22Falcini%2C+Federico%22">Falcini, Federico</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Martorelli%2C+Eleonora%22">Martorelli, Eleonora</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Morelli%2C+Eleonora%22">Morelli, Eleonora</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bosman%2C+Alessandro%22">Bosman, Alessandro</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Calarco%2C+Marilena%22">Calarco, Marilena</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chiocci%2C+Francesco+Latino%22">Chiocci, Francesco Latino</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Progress+in+Oceanography%22">Progress in Oceanography</searchLink>. Dec2018, Vol. 169, p66-78. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Submarine+valleys%22">Submarine valleys</searchLink><br /><searchLink fieldCode="DE" term="%22Turbidity+currents%22">Turbidity currents</searchLink><br /><searchLink fieldCode="DE" term="%22Multibeam+mapping%22">Multibeam mapping</searchLink><br /><searchLink fieldCode="DE" term="%22Stratigraphic+geology%22">Stratigraphic geology</searchLink><br /><searchLink fieldCode="DE" term="%22Continental+slopes%22">Continental slopes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Highlights • The recent morpho-stratigraphic setting of the GMS is reconstructed. • Turbidity currents interact with a complex morphology. • Erosive-depositional features are mostly related to overflow processes. Abstract The collection of high-resolution multibeam bathymetry, single-channel seismic profiles, TOBI side scan sonar data, and gravity cores allowed the characterization of the main morpho-sedimentary processes acting along the lower reach of the shelf-indenting Gioia-Mesima canyon-channel system (GMS) and the surrounding continental slope (southern Tyrrhenian Sea). This last area, developing across a depth range of 1000–1700 m, shows a complex morphology due to the interaction between downslope gravitative processes (mainly turbidite sheet flows) and abrupt changes in slope gradients related to tectonically-controlled scarps. Particularly, several erosive-depositional features (levee deposits, sediment undulations, channels) have been related to overflow processes from the northern flank of the GMS, although the lower reach of the GMS is characterized by strong entrenchment (canyon height ranging from 120 to 270 m) and low sinuosity. Morphological and seismic stratigraphy data indicate that the distribution and dimension of these features vary in response both to the proximity to the external levee of the GMS and to the topographic gradient of the lower continental slope. Particularly, we were able to discriminate between a gently sloping sector (on average 1.5°) dominated by sedimentary bypass of the turbidity currents and a steeper sector (about 3°), where the erosional capability of these currents seems to increase. Indeed, three channels, 4,3–6,5 km long and up to 20 m deep, incise this steeper sector, running parallel to each other at a distance of 1250–1500 m. To support the capability of overbanking flow in producing these channels, we used a physical model for the ignition of turbidity currents that provides realistic values for the ignitive state of the overbanking turbidity flows. More generally, the methodological approach used in this study may be useful to provide constraints on the genesis and evolution of erosive-depositional features in other tectonically-controlled margins, where sedimentary gravity flows interact with an uneven morphology. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Progress in Oceanography is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.pocean.2018.02.020 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 66 Subjects: – SubjectFull: Submarine valleys Type: general – SubjectFull: Turbidity currents Type: general – SubjectFull: Multibeam mapping Type: general – SubjectFull: Stratigraphic geology Type: general – SubjectFull: Continental slopes Type: general Titles: – TitleFull: Characterization of overbanking features on the lower reach of the Gioia-Mesima canyon-channel system (southern Tyrrhenian Sea) through integration of morpho-stratigraphic data and physical modelling. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Casalbore, Daniele – PersonEntity: Name: NameFull: Falcini, Federico – PersonEntity: Name: NameFull: Martorelli, Eleonora – PersonEntity: Name: NameFull: Morelli, Eleonora – PersonEntity: Name: NameFull: Bosman, Alessandro – PersonEntity: Name: NameFull: Calarco, Marilena – PersonEntity: Name: NameFull: Chiocci, Francesco Latino IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 00796611 Numbering: – Type: volume Value: 169 Titles: – TitleFull: Progress in Oceanography Type: main |
| ResultId | 1 |
