The depositional record of the Frasnian/Famennian boundary interval in a fore-reef succession, Canning Basin, Western Australia

George, Annette D.; Chow, Nancy

doi:10.1016/s0031-0182(01)00485-0

Cited by 40 publications

(56 citation statements)

References 47 publications

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“…The present study describes in detail an exemplary setting in the Canning Basin with prevailing anoxia and photic zone euxinia and relates these conditions to terrigenous nutrient input in a distinct time interval around the G-F boundary. The more oxygenated and well mixed watercolumn later in the Frasnian seems consistent with the studies by Becker et al (1991); George and Chow (2002) and George et al (2014), which all report a lack of anoxic facies in the Canning Basin at the F-F boundary. However, the time period of the Latest Frasnian is not covered here due to the low OM content in the corresponding core section.…”

Section: Significance Of the Present Study In The Context Of Other Lasupporting

confidence: 88%

“…House, 2002;Maslen et al, 2009;Śliwiński et al, 2011;Melendez et al, 2013a,b) and has therefore been considered a potential driver for the extinctions. However, in the Canning Basin there is no sedimentological evidence for anoxia at the F-F boundary although the reef systems were severely affected by the extinction event (Becker et al, 1991;George and Chow, 2002;Nothdurft et al, 2004;George et al, 2014). Instead there have been some reports of anoxic or suboxic conditions as well as photic zone euxinia Playford et al, 2009;Melendez et al, 2013a,b) earlier in the Frasnian and Givetian.…”

Section: Significance Of the Present Study In The Context Of Other Lamentioning

confidence: 99%

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Changes of palaeoenvironmental conditions recorded in Late Devonian reef systems from the Canning Basin, Western Australia: A biomarker and stable isotope approach

et al. 2015

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Although the Late Devonian extinctions were amongst the largest mass extinction events in the Phanerozoic, the causes, nature and timing of these events remain poorly restrained. In addition to the most pronounced biodiversity loss at the Frasnian-Famennian (F-F) boundary and the end Famennian, there were also less extensively studied extinction pulses in the Middle to Late Givetian and the Frasnian. Here we used a combination of palynological, elemental, molecular and stable isotope analyses to investigate a sedimentary record of reef-systems from this time period in the Canning Basin, Western Australia. The acquired data generally showed distinct variations between sediments from (i) the time around the Givetian-Frasnian (G-F) boundary and (ii) later in the Frasnian and indicated a distinct interval of biotic stress, particularly for reef-builders, in the older sediments. Alterations of pristane/phytane ratios, gammacerane indices, Chlorobi biomarkers, δD kerogen and chroman ratios describe the change from a restricted marine palaeoenvironment with an anoxic/euxinic hypolimnion towards a presumably open marine setting with a vertically mixed oxic to suboxic water column. Simultaneous excursions in δ 13 C profiles of carbonates, organic matter (OM) and hydrocarbons in the older sediments reflect the stratification-induced enhancement of OMrecycling by sulfate reducing bacteria. Alterations in sterane distributions and elevated abundances of methyltrimethyltridecylchromans (MTTCs) and perylene indicate an increased terrigenous nutrient input via riverine influx, which would have promoted stratification, phytoplankton blooms and the development of lower water column anoxia. The detected palaeoenvironmental conditions around the G-F boundary may reflect a local or global extinction event. Our data furthermore suggest a contribution of the higher plant-expansion and photic zone euxinia to the Late Devonian extinctions, consistent with previous hypotheses. Furthermore, this work might contribute to the understanding of variations in Devonian reef margin and platform-top architecture, relevant for petroleum exploration and development in the global Devonian hydrocarbon resources.

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Section: Significance Of the Present Study In The Context Of Other Lasupporting

confidence: 88%

Section: Significance Of the Present Study In The Context Of Other Lamentioning

confidence: 99%

Changes of palaeoenvironmental conditions recorded in Late Devonian reef systems from the Canning Basin, Western Australia: A biomarker and stable isotope approach

et al. 2015

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“…This event occurs at the base of the MN 11 Zone and coincides with the absence of phoebodont taxa in the Canning Basin. Despite reported localised tectonic overprinting (Southgate et al 1993;George and Chow 2002;Chow et al 2013), evidence of a longer-term 2 nd order transgressive event is observable in these sections. The effect of these localised and global events may be highly influential in the faunal changes and extinctions seen in the basin (George and Chow 2002).…”

Section: Biostratigraphymentioning

confidence: 65%

“…Despite reported localised tectonic overprinting (Southgate et al 1993;George and Chow 2002;Chow et al 2013), evidence of a longer-term 2 nd order transgressive event is observable in these sections. The effect of these localised and global events may be highly influential in the faunal changes and extinctions seen in the basin (George and Chow 2002). The phoebodont group has been previously noted as niche sensitive (Ginter and Turner 1999), which may explain their apparent confinement to specific sites in the Canning Basin.…”

Section: Biostratigraphymentioning

confidence: 65%

Upper Devonian microvertebrates from the Canning Basin, Western Australia

Roelofs

Playton

Barham

et al. 2015

Acta Geologica Polonica

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A diverse microvertebrate fauna is described from the Virgin Hills and Napier formations, Bugle Gap Limestone Canning Basin, Western Australia. Measured sections at Horse Spring and Casey Falls (Virgin Hills Formation) and South Oscar Range (Napier Formation) comprise proximal to distal slope carbonates ranging in age from the Late Devonian Frasnian to middle Famennian. A total of 18 chondrichthyan taxa are identified based on teeth, including the first record of Thrinacodus tranquillus, Cladoides wildungensis, Protacrodus serra and Lissodus lusavorichi from the Canning Basin. A new species, Diademodus dominicus sp. nov. is also described and provides the first record of this genus outside of Laurussia. In addition, the upper range of Australolepis seddoni has been extended to Late Devonian conodont Zone 11, making it the youngest known occurrence for this species. The Virgin Hills and Napier formations microvertebrate faunas show close affinities to faunas recovered from other areas of Gondwana, including eastern Australia, Iran, Morocco and South China, which is consistent with known conodont and trilobite faunas of the same age.

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“…Lack of sedimentological evidence for anoxia in latest Frasnian strata of the Canning Basin, northwestern Australia (Becker et al, 1991;George and Chow, 2002), contrasts with coeval geological records elsewhere (e.g., Joachimski et al, 2001;Chen et al, 2002;Riquier et al, 2006;Bond and Wignall, 2008). The Canning Basin reef complexes ( Fig.…”

Section: Introductionmentioning

confidence: 98%

Oxic facies and the Late Devonian mass extinction, Canning Basin, Australia

George

Chow

Trinajstic

2014

Geology

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The close association of anoxic or dysoxic sedimentary rocks and the major Late Devonian (Frasnian-Famennian) mass extinction has focused considerable attention on anoxia as the major cause or as a major factor in a multicausal scenario. The record of the Late Devonian biotic crisis in the well-known reef complexes of northwestern Australia (Canning Basin), in contrast to many localities elsewhere, does not display sedimentological evidence of anoxia through the Frasnian-Famennian boundary interval. Analysis of continuous drill core through this interval has yielded three positive δ 13 C isotopic excursions, only one of which coincides with total organic carbon (TOC) maxima in our data. Multielement geochemical proxies suggest that TOC maxima preceding positive shifts in δ 13 C most likely resulted from higher productivity caused by nutrient infl ux from continental weathering, given the close association between TOC maxima and regional relative sea-level falls. Our interpretation supports the view that anoxia was not a fundamental driver of mass extinction and stresses the importance of integrated data sets and understanding regional controls on environmental changes and/or stresses.

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The depositional record of the Frasnian/Famennian boundary interval in a fore-reef succession, Canning Basin, Western Australia

Cited by 40 publications

References 47 publications

Changes of palaeoenvironmental conditions recorded in Late Devonian reef systems from the Canning Basin, Western Australia: A biomarker and stable isotope approach

Changes of palaeoenvironmental conditions recorded in Late Devonian reef systems from the Canning Basin, Western Australia: A biomarker and stable isotope approach

Upper Devonian microvertebrates from the Canning Basin, Western Australia

Oxic facies and the Late Devonian mass extinction, Canning Basin, Australia

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