Evolution of the Exmouth-Barrow carbonate margin through the Miocene: Insights from 3D seismic data and field investigations (North West Shelf, Australia)

Riera, Rosine; Paumard, Victorien; Bourget, Julien; Allan, Tony; Lebrec, Ulysse

doi:10.1016/j.sedgeo.2023.106371

Cited by 3 publications

(4 citation statements)

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“…Grain grades, sphericity and sorting follow respectively Wentworth (1922), Powers (1953) and Pettijohn et al (1972). Age calibration is based on the review of the well completion reports and re-analysis of foraminiferal content of the wells Pyrenees-1, Macedon-1 and Macedon-3 (Riera et al, 2023). In order to integrate well data with seismic data, well data were loaded in PaleoScan™ and converted to time domain using publicly available sonic velocity logs (e.g., Katelis & Hernandianto, 1991).…”

Section: Methodsmentioning

confidence: 99%

“…The older ridge, Ridge 1, is developed within the regional seismic sequence Mi5 (Riera et al, 2023). The identification of Orbulina suturalis and Ridge 2 is embedded in the much thicker regional seismic sequence Mi6 (Riera et al, 2023), which reaches a thickness of ca. 250 m at Ramillies-1 and is composed of sub-parallel to chaotic seismic reflectors draping the thin seismic sequence bearing Ridge 1 (Figure 3).…”

Section: Seismic Stratigraphic Frameworkmentioning

confidence: 98%

“…The ridges are present in two distinct stratigraphic intervals. The older ridge, Ridge 1, is developed within the regional seismic sequence Mi5 (Riera et al, 2023). The identification of Orbulina suturalis and Ridge 2 is embedded in the much thicker regional seismic sequence Mi6 (Riera et al, 2023), which reaches a thickness of ca.…”

Section: Seismic Stratigraphic Frameworkmentioning

confidence: 98%

“…Quartz grains were not observed. Bioclasts include porcelaneous foraminifera F I G U R E 3 Un-interpreted (a) and interpreted (b) seismic line highlighting the general stratigraphic framework (modified from Riera et al, 2023). Note that Ridge 1 is developed within the sequence Mi5, that is time equivalent to the outcropping tropical lagoon, while Ridge 2 is within the sequence Mi6, that is time equivalent to the Bare Formation (see Figure 2).…”

Section: Seismic Stratigraphic Frameworkmentioning

confidence: 99%

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Differentiating reefal ridges from relict coastal ridges: Lessons from the seismic geomorphologic study of buried Miocene buildups (North West Shelf, Australia)

et al. 2023

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Linear buildups formed in tropical carbonate environments are often interpreted as bioconstructed reefs. Nevertheless, coastal processes can also form extensive sedimentary ridges exhibiting buildup morphologies. This study investigates two Miocene ridges developed along the Australian North West Shelf using 3D seismic and well data. Ridge 1 is ca. 30 m thick and >60 km long, and it is made of foraminiferal pack‐grainstones. It protects a lagoon with pinnacle morphologies. Ridge 2 is ca. 150 m thick and >80 km long. It is composed of quartz sand forming lobes. Both ridges have a continuous curvilinear front and are in a mid‐shelf setting. They mimic the modern Australian coastline. It is then proposed that Ridge 1 is either: (1) a barrier reef developed on a drowned shoreline, or (2) stacked carbonate aeolianites and beachrocks acting as a barrier. Ridge 2 is interpreted as stacked deltaic sands. This study demonstrates that lithified and buried coastal features of carbonate and siliciclastic nature can form extensive ridges exhibiting buildup morphologies. It is proposed that ridges formed by stacked coastal features are overall continuous with a curvilinear front, while reefal ridges are more discontinuous and exhibit deeper and more stable passes.

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Section: Methodsmentioning

confidence: 99%

Section: Seismic Stratigraphic Frameworkmentioning

confidence: 98%

Section: Seismic Stratigraphic Frameworkmentioning

confidence: 98%

Section: Seismic Stratigraphic Frameworkmentioning

confidence: 99%

See 2 more Smart Citations

Differentiating reefal ridges from relict coastal ridges: Lessons from the seismic geomorphologic study of buried Miocene buildups (North West Shelf, Australia)

et al. 2023

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Seismic sedimentology response characteristics of nearshore terminal fan in the suning area of Raoyang Sag, Bohai Bay Basin, NE China

Li,

Meng,

Xie

et al. 2024

Heliyon

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Using shallow hydroacoustic data to image seafloor mass transport deposits on the North West Shelf of Australia: links to neotectonics

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Lindhorst

Kuhnt

et al. 2023

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Mass transport deposits have long been known on the Exmouth Plateau, offshore NW Australia, identified in 2D and 3D industry seismic lines. The expedition SO257 in 2017 collected 30 high-resolution, shallow seismic lines along targeted transects on the northern Australian margin. Many of these imaged mass transport deposits, with the top 700-800m of the section captured in detail not available with industry seismic. We present 9 new high resolution seismic lines from 3 separate areas of the North West Shelf. Slides in the Roebuck Basin show complex anastomosing ductile extensional mechanisms, with multiple slip surfaces and no headscarps or adjacent faults. Slides on the Exmouth Plateau have fault control, with surface fault offsets of up to 300m, indicating seismicity as a likely triggering mechanism. Slumps along the western margin of Western Australia are more limited in extent, associated with surface notches, with indications of previous activity at depth. All areas show a repeated history of mass transport deposits. The area of the active landslide province offshore of NW Australia is far larger than the individual slides recognized on the Exmouth Plateau.

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Evolution of the Exmouth-Barrow carbonate margin through the Miocene: Insights from 3D seismic data and field investigations (North West Shelf, Australia)

Cited by 3 publications

References 86 publications

Differentiating reefal ridges from relict coastal ridges: Lessons from the seismic geomorphologic study of buried Miocene buildups (North West Shelf, Australia)

Differentiating reefal ridges from relict coastal ridges: Lessons from the seismic geomorphologic study of buried Miocene buildups (North West Shelf, Australia)

Seismic sedimentology response characteristics of nearshore terminal fan in the suning area of Raoyang Sag, Bohai Bay Basin, NE China

Using shallow hydroacoustic data to image seafloor mass transport deposits on the North West Shelf of Australia: links to neotectonics

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