Modelling of sediment wedge movement along low-angle detachments using ABAQUS™
Delta-deepwater fold-thrust belts (DDWFTBs) develop over low-angle detachment faults which link extension to downslope contraction. Detachment faults have been examined in previous studies for the Amazon Fan, Niger, Nile, Angola, Baram and Bight Basin DDWFTBs. The driving mechanisms for the movement...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Geological Society Publishing House
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/53470 |
| _version_ | 1848759151810838528 |
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| author | Tuitt, A. King, R. Hergert, R. Tingay, Mark Hillis, R. |
| author_facet | Tuitt, A. King, R. Hergert, R. Tingay, Mark Hillis, R. |
| author_sort | Tuitt, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Delta-deepwater fold-thrust belts (DDWFTBs) develop over low-angle detachment faults which link extension to downslope contraction. Detachment faults have been examined in previous studies for the Amazon Fan, Niger, Nile, Angola, Baram and Bight Basin DDWFTBs. The driving mechanisms for the movement along the detachment remain uncertain, however. Previous authors have attributed the movement along detachment faults to high pore-fluid pressure, which reduces the effective normal stress acting on a fault surface thereby encouraging sliding along the fault. However, high pore-fluid pressure has not been directly confirmed in many of these faults due to a lack of well data in detachment surfaces. In this study, finite element modelling was used to test the effects of pore-fluid pressure, coefficient of friction, sediment rigidity and sediment wedge angle on sliding along the detachment. The modelling suggests that increased pore-fluid pressures and decreased coefficients of friction increase slip along a detachment. At hydrostatic pore-fluid pressures, sediment rigidity and sediment wedge angle have relatively little effect on the movement of the sediment wedge along the detachment. Modelling of these conditions using ABAQUSTM improves our understanding of the nature and mechanics of DDWFTBs and their underlying detachments. |
| first_indexed | 2025-11-14T09:55:20Z |
| format | Journal Article |
| id | curtin-20.500.11937-53470 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:55:20Z |
| publishDate | 2012 |
| publisher | Geological Society Publishing House |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-534702017-10-20T03:59:52Z Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ Tuitt, A. King, R. Hergert, R. Tingay, Mark Hillis, R. Delta-deepwater fold-thrust belts (DDWFTBs) develop over low-angle detachment faults which link extension to downslope contraction. Detachment faults have been examined in previous studies for the Amazon Fan, Niger, Nile, Angola, Baram and Bight Basin DDWFTBs. The driving mechanisms for the movement along the detachment remain uncertain, however. Previous authors have attributed the movement along detachment faults to high pore-fluid pressure, which reduces the effective normal stress acting on a fault surface thereby encouraging sliding along the fault. However, high pore-fluid pressure has not been directly confirmed in many of these faults due to a lack of well data in detachment surfaces. In this study, finite element modelling was used to test the effects of pore-fluid pressure, coefficient of friction, sediment rigidity and sediment wedge angle on sliding along the detachment. The modelling suggests that increased pore-fluid pressures and decreased coefficients of friction increase slip along a detachment. At hydrostatic pore-fluid pressures, sediment rigidity and sediment wedge angle have relatively little effect on the movement of the sediment wedge along the detachment. Modelling of these conditions using ABAQUSTM improves our understanding of the nature and mechanics of DDWFTBs and their underlying detachments. 2012 Journal Article http://hdl.handle.net/20.500.11937/53470 10.1144/SP367.12 Geological Society Publishing House restricted |
| spellingShingle | Tuitt, A. King, R. Hergert, R. Tingay, Mark Hillis, R. Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ |
| title | Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ |
| title_full | Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ |
| title_fullStr | Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ |
| title_full_unstemmed | Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ |
| title_short | Modelling of sediment wedge movement along low-angle detachments using ABAQUS™ |
| title_sort | modelling of sediment wedge movement along low-angle detachments using abaqus™ |
| url | http://hdl.handle.net/20.500.11937/53470 |