|
|
|
|
|
| Pattier, France; Etienne, S.; Collot, J; Patriat, Martin; Tournadour, Elsa; Roest, Walter; Rouillard, P.. |
| The Fairway Basin is an intracratonic deep-water basin inherited from cretaceous rifting, perched between the Lord Howe Rise and the New Caledonia Basin in the Southwest Pacific. Its originality lies in its atypical present-day physiography and its carbonate-dominated sedimentary setting since the Miocene. Although very limited well controls are available, its overall structure, seismic stratigraphy and architecture are relatively well known. However, little is known on the detailed sedimentary processes controlling its recent infill. Its remote location from any major clastic sediment sources provides a great setting to study deep-water carbonate sedimentary processes. In this paper, we propose a detailed analysis of surface morphologies based on existing... |
| Tipo: Text |
Palavras-chave: Deep-water carbonates; Submarine landslides; Turbidites; Polygonal faulting; Fluid escape; Fairway Basin. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/60001/63237.pdf |
| |
|
|
| Patriat, Martin; Collot, Julien; Danyushevsky, L.; Fabre, M.; Meffre, S.; Falloon, T.; Rouillard, P.; Pelletier, B.; Roach, M.; Fournier, M.. |
| New geophysical data acquired during three expeditions of the R/V Southern Surveyor in the southern part of the North Fiji Basin allow us to characterize the deformation of the upper plate at the southern termination of the New Hebrides subduction zone, where it bends eastward along the Hunter Ridge. Unlike the northern end of the Tonga subduction zone, on the other side of the North Fiji Basin, the 90° bend does not correspond to the transition from a subduction zone to a transform fault, but it is due to the progressive retreat of the New Hebrides trench. The subduction trench retreat is accommodated in the upper plate by the migration toward the southwest of the New Hebrides arc and toward the south of the Hunter Ridge, so that the direction of... |
| Tipo: Text |
|
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00280/39110/37663.pdf |
| |
|
|
| Collot, Julien; Patriat, Martin; Etienne, S.; Rouillard, P.; Soetaert, F.; Juan, C.; Marcaillou, B.; Palazzin, G.; Clerc, C.; Maurizot, P.; Pattier, F; Tournadour, E.; Sevin, B.; Privat, A.. |
| Classically, deepwater fold-and-thrust belts are classified in two main types, depending if they result from near- or far-field stresses and the understanding of their driving and triggering mechanism is poorly known. We present a geophysical dataset off the western margin of New Caledonia (SW Pacific) that reveals deformed structures of a deepwater fold-and-thrust belt that we interpret as a near-field gravity-driven system, which is not located at a rifted passive margin. The main factor triggering deformation is inferred to be oversteepening of the margin slope by post-obduction isostatic rebound. Onshore erosion of abnormally-dense obducted material, combined with sediment loading in the adjacent basin, has induced vertical motions that have caused... |
| Tipo: Text |
Palavras-chave: Deepwater fold-and-thrust belt; Obduction; Isostasy. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00405/51614/52162.pdf |
| |
|
|
| Etienne, S.; Collot, Julien; Sutherland, R.; Patriat, Martin; Bache, Francois; Rouillard, P.; Henrys, S.; Barker, D.; Juan, C.. |
| The New Caledonia Trough (NCT) is a 2000–3000 m deep bathymetric feature that extends 2500 km from Taranaki, New Zealand, to the western margin of New Caledonia (Northern Zealandia, SW Pacific). The underlying sedimentary basin originates from Cretaceous extension, but underwent a significant Eocene tectonic event that shaped its present physiography. We present an analysis of the basin based on multibeam data, seismic profiles and rock samples collected on the TAN1312 and TAN1409 Expeditions onboard R/V Tangaroa, combined with legacy data. We focus on the southern part of the basin, where new data reveal a link between compressive deformation of Paleocene strata and their potential reworking into the basin. On the western basin side, Upper Cretaceous to... |
| Tipo: Text |
Palavras-chave: Zealandia; New Caledonia Trough; Deepwater basin; Syn-tectonic deposition; Submarine canyon; Sediment waves. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00414/52550/53377.pdf |
| |
|
|
|
