Quaternary onset and evolution of Kimberley coral reefs (Northwest Australia) revealed by high-resolution seismic imaging

Bufarale, Giada; Collins, Lindsay B.; O’Leary, Michael J.; Stevens, A. W.; Kordi, Moataz; Solihuddin, Tubagus

doi:10.1016/j.csr.2016.04.002

Cited by 1 publication

(4 citation statements)

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“…Similarly, seismic profiles at Adele Reef indicate that the upper LIG reef surface is 25 mbsl ( Figure 5), giving an inferred subsidence rate of ~0.2 mm/year. So while the subsidence of the NW is well documented, particularly in the petroleum well (Ingram, 1982;Marshall, 1995) and seismic data (Bufarale et al, 2016), this study is able to constrain rates based on the elevation of the Holocene/LIG unconformity surface. This cross-shelf dataset of LIG reef elevations provides the first quantitative estimate of neotectonic subsidence rates across the NW shelf of Australia, spanning the last 120,000 years.…”

Section: Cross-shelf Profile Of Holocene Reef Accretionmentioning

confidence: 93%

“…Based on the Scott Reefs observations, R2 at Adele Reef is also interpreted as representing the MIS 7 exposure surface. R2 was not observed in any of the inner shelf seismic surveys (Bufarale et al, 2016) or in the mine pit stratigraphic section of Cockatoo Island (Solihuddin et al, 2015), perhaps indicating that this area remained above sea level during MIS 7.…”

Section: Reef Stratigraphy and Sea-level Changesmentioning

confidence: 96%

“…Subbottom profiling data were digitally acquired, recorded, post-processed and analysed using SonarWiz 5 (Chesapeake Technology Inc., Mountain View, CA). Interpretation of the seismic reflectors depicted in the profiles was performed using a combination of inshore reef seismic data from Bufarale et al (2016) and petroleum well-log data from Adele Island 1 (Ingram, 1982;Marshall, 1995). Geoscience Australia's 250 m bathymetry dataset was analysed using ESRI's Arc Hydro Tools Terrain Pre-processing toolset to map the position and bathymetry of shelf palaeochannels.…”

Section: Seismic Surveymentioning

confidence: 99%

“…Compared to the relatively well-studied oceanic reefs such as Scott Reefs and the Rowley Shoals (Collins, 2011), and the inshore reefs of the Buccaneer Archipelago (Collins et al, 2015;Solihuddin et al, 2015Solihuddin et al, , 2016Bufarale et al, 2016), the Holocene development of the mid-shelf platform reefs of Australia's northwest shelf remains unknown. The present study attempts to address the information gap by investigating modern habitats, geomorphology and the late Holocene accretion history of Adele Reef through remote sensing, shallow subbottom pro-filing, reef core stratigraphy and radiocarbon dating.…”

Section: Introductionmentioning

confidence: 99%

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Geomorphology and late Holocene accretion history of Adele Reef: a northwest Australian mid-shelf platform reef

Solihuddin

Bufarale

Blakeway³

et al. 2016

Geo-Mar Lett

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The mid-shelf reefs of the Kimberley Bioregion are one of Australia's more remote tropical reef provinces and such have received little attention from reef researchers. This study describes the geomorphology and late Holocene accretion history of Adele Reef, a mid-shelf platform reef, through remote sensing of contemporary reef habitats, shallow seismic profiling, shallow percussion coring and radiocarbon dating. Seismic profiling indicates that the Holocene reef sequence is 25 to 35 m thick and overlies at least three earlier stages of reef build-up, interpreted as deposited during marine isotope stages 5, 7 and 9 respectively. The cored shallow subsurface facies of Adele Reef are predominantly detrital, comprising small coral colonies and fragments in a sandy matrix. Reef cores indicate a 'catch-up' growth pattern, with the reef flat being approximately 5-10 m deep when sea level stabilised at its present elevation 6,500 years BP. The reef flat is rimmed by a broad low-relief reef crest only 10-20 cm high, characterised by anastomosing ridges of rhodoliths and coralliths. The depth of the Holocene/last interglacial contact (25-30 m) suggests a subsidence rate of 0.2 mm/year for Adele Reef since the last interglacial. This value, incorporated with subsidence rates from Cockatoo Island (inshore) and Scott Reefs (offshore), provides the first quantitative estimate of hinge subsidence for the Kimberley coast and adjacent shelf, with progressively greater subsidence across the shelf.

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Section: Cross-shelf Profile Of Holocene Reef Accretionmentioning

confidence: 93%

Section: Reef Stratigraphy and Sea-level Changesmentioning

confidence: 96%

Section: Seismic Surveymentioning

confidence: 99%