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A new depositional model for the Tuaheni Landslide Complex, Hikurangi Margin, New Zealand

View ORCID ProfileBenjamin Couvin, View ORCID ProfileAggeliki Georgiopoulou, View ORCID ProfileJoshu J. Mountjoy, View ORCID ProfileLawrence Amy, View ORCID ProfileGareth J. Crutchley, View ORCID ProfileMorgane Brunet, View ORCID ProfileSebastian Cardona, View ORCID ProfileFelix Gross, View ORCID ProfileChristoph Böttner, View ORCID ProfileSebastian Krastel and Ingo Pecher
Geological Society, London, Special Publications, 500, 551-566, 19 May 2020, https://doi.org/10.1144/SP500-2019-180
Benjamin Couvin
1Irish Centre for Research in Applied Geosciences, University College Dublin, Ireland
Roles: [Conceptualization (Supporting)], [Data curation (Equal)], [Formal analysis (Lead)], [Investigation (Lead)], [Methodology (Equal)], [Project administration (Supporting)], [Validation (Equal)], [Visualization (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Benjamin Couvin
  • For correspondence: benjamin.couvin@ucdconnect.ie
Aggeliki Georgiopoulou
2School of Environment and Technology, University of Brighton, UK
Roles: [Conceptualization (Lead)], [Data curation (Equal)], [Formal analysis (Supporting)], [Investigation (Supporting)], [Methodology (Lead)], [Project administration (Lead)], [Resources (Equal)], [Supervision (Lead)], [Validation (Equal)], [Writing - Review & Editing (Lead)]
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  • ORCID record for Aggeliki Georgiopoulou
Joshu J. Mountjoy
3National Institute for Water and Atmospheric Research, Wellington, New Zealand
Roles: [Conceptualization (Lead)], [Data curation (Equal)], [Formal analysis (Supporting)], [Investigation (Supporting)], [Methodology (Equal)], [Project administration (Supporting)], [Resources (Equal)], [Supervision (Equal)], [Validation (Equal)], [Visualization (Supporting)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Joshu J. Mountjoy
Lawrence Amy
1Irish Centre for Research in Applied Geosciences, University College Dublin, Ireland
Roles: [Investigation (Supporting)], [Project administration (Supporting)], [Supervision (Supporting)], [Validation (Equal)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Lawrence Amy
Gareth J. Crutchley
4GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany
Roles: [Data curation (Supporting)], [Formal analysis (Supporting)], [Methodology (Supporting)], [Resources (Equal)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Gareth J. Crutchley
Morgane Brunet
5Géosciences Rennes, Université Rennes 1, France
Roles: [Resources (Equal)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Morgane Brunet
Sebastian Cardona
6Colorado School of Mines, Golden, CO, USA
Roles: [Resources (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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  • ORCID record for Sebastian Cardona
Felix Gross
7Institute of Geosciences, University of Kiel, Germany
Roles: [Writing - Review & Editing (Equal)]
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  • ORCID record for Felix Gross
Christoph Böttner
4GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany
Roles: [Writing - Review & Editing (Equal)]
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  • ORCID record for Christoph Böttner
Sebastian Krastel
7Institute of Geosciences, University of Kiel, Germany
Roles: [Resources (Equal)], [Writing - Review & Editing (Supporting)]
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  • ORCID record for Sebastian Krastel
Ingo Pecher
8School of Environment, University of Auckland, New Zealand
Roles: [Writing - Review & Editing (Supporting)]
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Abstract

The Tuaheni Landslide Complex (TLC) is characterized by areas of compression upslope and extension downslope. It has been thought to consist of a stack of two genetically linked landslide units identified from seismic data. We used 3D seismic reflection, bathymetry data and International Ocean Discovery Program Core U1517C (Expedition 372) to understand the internal structures, deformation mechanisms and depositional processes of the TLC deposits. Units II and III of U1517C correspond to the two chaotic units in 3D seismic data. In the core, Unit II shows deformation, whereas Unit III appears more like an in situ sequence. Variance attribute analysis showed that Unit II is split into lobes around a coherent stratified central ridge and is bounded by scarps. By contrast, we found that Unit III is continuous beneath the central ridge and has an upslope geometry, which we interpreted as a channel–levee system. Both units show evidence of lateral spreading due to the presence of the Tuaheni Canyon removing support from the toe. Our results suggest that Units II and III are not genetically linked, are separated substantially in time and had different emplacement mechanisms, but they fail under similar circumstances.

  • © 2020 The Author(s). Published by The Geological Society of London. All rights reserved
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Geological Society, London, Special Publications: 500 (1)
Geological Society, London, Special Publications
Volume 500
2020
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A new depositional model for the Tuaheni Landslide Complex, Hikurangi Margin, New Zealand

Benjamin Couvin, Aggeliki Georgiopoulou, Joshu J. Mountjoy, Lawrence Amy, Gareth J. Crutchley, Morgane Brunet, Sebastian Cardona, Felix Gross, Christoph Böttner, Sebastian Krastel and Ingo Pecher
Geological Society, London, Special Publications, 500, 551-566, 19 May 2020, https://doi.org/10.1144/SP500-2019-180
Benjamin Couvin
1Irish Centre for Research in Applied Geosciences, University College Dublin, Ireland
Roles: [Conceptualization (Supporting)], [Data curation (Equal)], [Formal analysis (Lead)], [Investigation (Lead)], [Methodology (Equal)], [Project administration (Supporting)], [Validation (Equal)], [Visualization (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Benjamin Couvin
  • For correspondence: benjamin.couvin@ucdconnect.ie
Aggeliki Georgiopoulou
2School of Environment and Technology, University of Brighton, UK
Roles: [Conceptualization (Lead)], [Data curation (Equal)], [Formal analysis (Supporting)], [Investigation (Supporting)], [Methodology (Lead)], [Project administration (Lead)], [Resources (Equal)], [Supervision (Lead)], [Validation (Equal)], [Writing - Review & Editing (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Aggeliki Georgiopoulou
Joshu J. Mountjoy
3National Institute for Water and Atmospheric Research, Wellington, New Zealand
Roles: [Conceptualization (Lead)], [Data curation (Equal)], [Formal analysis (Supporting)], [Investigation (Supporting)], [Methodology (Equal)], [Project administration (Supporting)], [Resources (Equal)], [Supervision (Equal)], [Validation (Equal)], [Visualization (Supporting)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
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  • ORCID record for Joshu J. Mountjoy
Lawrence Amy
1Irish Centre for Research in Applied Geosciences, University College Dublin, Ireland
Roles: [Investigation (Supporting)], [Project administration (Supporting)], [Supervision (Supporting)], [Validation (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Lawrence Amy
Gareth J. Crutchley
4GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany
Roles: [Data curation (Supporting)], [Formal analysis (Supporting)], [Methodology (Supporting)], [Resources (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Gareth J. Crutchley
Morgane Brunet
5Géosciences Rennes, Université Rennes 1, France
Roles: [Resources (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Morgane Brunet
Sebastian Cardona
6Colorado School of Mines, Golden, CO, USA
Roles: [Resources (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Sebastian Cardona
Felix Gross
7Institute of Geosciences, University of Kiel, Germany
Roles: [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Felix Gross
Christoph Böttner
4GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany
Roles: [Writing - Review & Editing (Equal)]
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  • ORCID record for Christoph Böttner
Sebastian Krastel
7Institute of Geosciences, University of Kiel, Germany
Roles: [Resources (Equal)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Sebastian Krastel
Ingo Pecher
8School of Environment, University of Auckland, New Zealand
Roles: [Writing - Review & Editing (Supporting)]
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  • Find this author on PubMed
  • Search for this author on this site

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A new depositional model for the Tuaheni Landslide Complex, Hikurangi Margin, New Zealand

Benjamin Couvin, Aggeliki Georgiopoulou, Joshu J. Mountjoy, Lawrence Amy, Gareth J. Crutchley, Morgane Brunet, Sebastian Cardona, Felix Gross, Christoph Böttner, Sebastian Krastel and Ingo Pecher
Geological Society, London, Special Publications, 500, 551-566, 19 May 2020, https://doi.org/10.1144/SP500-2019-180
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