Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin
Abstract We investigate the morphology and timing of Tuaheni North, a large submarine landslide within the Tuaheni Landslide Complex on Aotearoa New Zealand's Hikurangi Margin. We show a clear correlation between two major source volumes from Tuaheni North and two downslope mass transport depos...
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| Format: | Article |
| Language: | English |
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Wiley
2025-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL115159 |
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| author | Alexey Portnov Jess I. T. Hillman Sally Watson Ann E. Cook Andreas Laake Francisco José Lobo |
| author_facet | Alexey Portnov Jess I. T. Hillman Sally Watson Ann E. Cook Andreas Laake Francisco José Lobo |
| author_sort | Alexey Portnov |
| collection | DOAJ |
| description | Abstract We investigate the morphology and timing of Tuaheni North, a large submarine landslide within the Tuaheni Landslide Complex on Aotearoa New Zealand's Hikurangi Margin. We show a clear correlation between two major source volumes from Tuaheni North and two downslope mass transport deposits (MTDs), suggesting there were two distinct events. These two stacked MTDs have a distinct intermediate layer, indicating a time gap between the failures. We estimate the age of these two failure events using a novel method based on the gas hydrate stability zone response to sediment cooling. Our results suggest that the northern event is older than the southern, with estimated ages of 37,000 and 23,000 years, respectively, providing a timeline for the Tuaheni North landslide evolution. Our study highlights a contrast between the rapid, abrupt landslide activity at Tuaheni North and the slow, creeping movements of Tuaheni South, revealing distinct behaviors within the same landslide complex. |
| format | Article |
| id | doaj-art-4071cf0b620d4eb1b2acea4e02ecb2c0 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-4071cf0b620d4eb1b2acea4e02ecb2c02025-08-20T03:21:32ZengWileyGeophysical Research Letters0094-82761944-80072025-05-01529n/an/a10.1029/2025GL115159Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi MarginAlexey Portnov0Jess I. T. Hillman1Sally Watson2Ann E. Cook3Andreas Laake4Francisco José Lobo5Instituto Andaluz de Ciencias de la Tierra IACT‐CSIC Granada SpainNational Institute of Water and Atmospheric Research (NIWA) Wellington Aotearoa New ZealandNational Institute of Water and Atmospheric Research (NIWA) Wellington Aotearoa New ZealandSchool of Earth Sciences The Ohio State University Columbus OH USASLB Aachen Technology Center Aachen GermanyInstituto Andaluz de Ciencias de la Tierra IACT‐CSIC Granada SpainAbstract We investigate the morphology and timing of Tuaheni North, a large submarine landslide within the Tuaheni Landslide Complex on Aotearoa New Zealand's Hikurangi Margin. We show a clear correlation between two major source volumes from Tuaheni North and two downslope mass transport deposits (MTDs), suggesting there were two distinct events. These two stacked MTDs have a distinct intermediate layer, indicating a time gap between the failures. We estimate the age of these two failure events using a novel method based on the gas hydrate stability zone response to sediment cooling. Our results suggest that the northern event is older than the southern, with estimated ages of 37,000 and 23,000 years, respectively, providing a timeline for the Tuaheni North landslide evolution. Our study highlights a contrast between the rapid, abrupt landslide activity at Tuaheni North and the slow, creeping movements of Tuaheni South, revealing distinct behaviors within the same landslide complex.https://doi.org/10.1029/2025GL115159submarine landslidegas hydrateTuaheni landslidemass transport depositNew Zealand |
| spellingShingle | Alexey Portnov Jess I. T. Hillman Sally Watson Ann E. Cook Andreas Laake Francisco José Lobo Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin Geophysical Research Letters submarine landslide gas hydrate Tuaheni landslide mass transport deposit New Zealand |
| title | Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin |
| title_full | Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin |
| title_fullStr | Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin |
| title_full_unstemmed | Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin |
| title_short | Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin |
| title_sort | unlocking the style and timing of submarine landslides insights from the tuaheni north slide hikurangi margin |
| topic | submarine landslide gas hydrate Tuaheni landslide mass transport deposit New Zealand |
| url | https://doi.org/10.1029/2025GL115159 |
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