Sediment flux across the Great Barrier Reef Shelf to the Queensland Trough over the last 300ky

Dunbar, Gavin B.; Dickens, Gerald R.; Carter, R.M.

doi:10.1016/s0037-0738(00)00027-0

Cited by 86 publications

(89 citation statements)

References 43 publications

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“…However, for the mid-outer shelf reefs in this study, the greater distance from terrigenous sources would greatly reduce their exposure to sediment flux and discharge (Orpin et al, 1999, Neil et al, 2002. Whilst evidence of siliciclastic sediment has been identified in cores along the outer northeast Australia margin (Dunbar et al, 2000, Dunbar andDickens, 2003), peak siliciclastic discharge occurred between 11 ka and 7 ka, significantly earlier than the hiatus reported in this study.…”

Section: >>Figcontrasting

confidence: 69%

Successive phases of Holocene reef flat development: Evidence from the mid- to outer Great Barrier Reef

Dechnik

Webster

Webb

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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A re-examination of 46 recently published U/Th reef flat ages from Heron and One Tree reefs in the southern Great Barrier Reef (GBR) identified several distinct Holocene reef growth phases with a clear 2.3-kyr hiatus in lateral reef accretion from 3.9 ka to 1.5 ka. An analysis of all available published radiocarbon reef flat ages (165) from 27 other mid-outer platform reefs revealed a similar hiatus between 3.6 ka and 1.6 ka for the northern, south-central and southern GBR. However, no hiatus in reef flat growth was observed in reefs from the central GBR with ages ranging from 7.6 ka to 0.9 ka. Increased upwelling, turbidity and cyclone activity in response to increased sea-surface temperature (SST's), precipitation and El-Nino Southern Oscillation variability have been ruled out as possible mechanisms of reef turn-off for the midouter platform reefs. Rather, a fall (~0.5 m) in relative sea level at 4-3.5 ka is the most likely explanation for why reefs in the northern and southern regions turned off during this time.Greater hydro-isostatic adjustment of the central GBR and long term subsidence of the HalifaxBasin may have provided greater vertical accommodation for the mid-outer reefs of the central GBR, thus allowing these reefs to continue to accrete vertically despite a fall in sea level ~4-3.5 ka. Further evidence for greater subsidence in this region includes the lack of senile reefs and dominance of incipient and juvenile reefs in the central GBR. This suggests that these reefs approached sea level considerably later than the northern and southern reefs, consistent with their deeper antecedent substrates. Thus, these results not only provide important information about possible reef flat demise in response to natural environmental factors, but also provide insights into regional subsidence that affected relative sea level along the east Australian margin during the Holocene.

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Section: >>Figcontrasting

confidence: 69%

Successive phases of Holocene reef flat development: Evidence from the mid- to outer Great Barrier Reef

Dechnik

Webster

Webb

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Evidence also exists for the influence of low glacial sea levels on the lower Barron (Jones, 1985) and Burdekin Rivers (Fielding et al, 2003), and for increased siliclastic sedimentation beyond the Great Barrier Reef at the Pleistocene-Holocene transition 11-7 ka (Dunbar et al, 2000;Dunbar and Dickens, 2003;Heap et al, 2002). These authors present two separate explanations for this sediment pulse: either an increase in sediment flux from the continental landmass, or reworking of Pleistocene sediment during the post-glacial marine transgression.…”

Section: Fluvial Response To Climate Change In Ne Queenslandmentioning

confidence: 99%

Understanding the impacts of Late Quaternary climate change in tropical and sub-tropical regions

Thomas

2008

Geomorphology

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“…Hence, this interval is the equivalent of OAE 1a, represented also by, e.g., the Selli Level in Italy (e.g., Coccioni et al, 1992;Larson et al, 1993;Baudin et al, 1998;Erba et al, 1999), the Goguel level in the Vocontian Trough in France (e.g., Bréhéret, 1988;Weissert & Bréhéret, 1991), and by an organic-rich layer on Pacific guyots associated with a positive 13 C-shift (Jenkyns, 1995;Rö hl & Ogg, 1996). Detrital quartz, a high proportion of terrestrially derived organic matter, and relative abundance of radiolarians implying nutrient input suggest that the transgression reached terrigenous source areas (Erbacher & Thurow, 1997) or remobilized terrigenous material stored on the shallow platform (Dunbar et al, 2000). Platform drowning that was time-equivalent to the OAE 1a has been documented in several areas: e.g., the Urgonian Platform in France and Switzerland (Hunt & Tucker, 1993;Fö llmi et al, 1994), the Abruzzi Platform in Italy (D'Argenio et al, 1993), and the isolated Mount Kanala Platform in Greece (Grö tsch et al, 1998).…”

Section: Eustasy Oceanic Circulation and Climate Changesmentioning

confidence: 99%

The Aptian, Albian and Cenomanian of Roter Sattel, Romandes Prealps, Switzerland: a high-resolution record of oceanographic changes

Strasser

Caron

Gjermeni

2001

Cretaceous Research

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The Aptian-Lower Turonian hemipelagic sediments of Roter Sattel in the Swiss Prealps are well dated by planktonic foraminifera. Stacking pattern of the limestone-marl alternations and facies evolution allow the identification of sequence boundaries, transgressive surfaces, and maximum-flooding events or condensed sections on at least two hierarchical levels.Calibrated by a precise biostratigraphic framework, the major sequence boundaries can be correlated with those recognized elsewhere in European basins. Organic-rich black shales are generally confined to transgressive and/or condensed intervals and correspond to the oceanic anoxic events (OAE) 1a-d and 2. OAE 1a and OAE 2 show well-marked positive shifts in 13 C. High-resolution analysis of the Roter Sattel section shows that eustatic sea-level changes and fluctuations in the global carbon cycle are clearly recognizable. However, these were overprinted by regional changes of climate and availability of terrigenous source areas controlling nutrient input and hence organic productivity, and by regional and local tectonics shaping basin morphology and modifying the paths of oceanic currents. This led to facies changes, strongly varying sedimentation rates, and non-deposition or erosion during the Aptian Planomalina cheniourensis Zone. Despite this distortion of the sedimentary record, the Roter Sattel section may serve as a corner-stone for the study of basin-wide or global oceanographic, climatic, and evolutionary changes when correlated with sections in other palaeogeographical domains.2001 Academic Press

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Sediment flux across the Great Barrier Reef Shelf to the Queensland Trough over the last 300ky

Cited by 86 publications

References 43 publications

Successive phases of Holocene reef flat development: Evidence from the mid- to outer Great Barrier Reef

Successive phases of Holocene reef flat development: Evidence from the mid- to outer Great Barrier Reef

Understanding the impacts of Late Quaternary climate change in tropical and sub-tropical regions

The Aptian, Albian and Cenomanian of Roter Sattel, Romandes Prealps, Switzerland: a high-resolution record of oceanographic changes

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