The Timing and Duration of the Delamerian Orogeny: Correlation with the Ross Orogen and Implications for Gondwana Assembly

Foden, John; Elburg, Marlina; Dougherty-Page, J; Burtt, Andrew

doi:10.1086/499570

Cited by 327 publications

(240 citation statements)

References 77 publications

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“…The Delamerian Orogeny commenced 514 Ma (Foden et al, 2006), ceasing with a period of rapid uplift, cooling and extension, 490 Ma. The orogen consists of Precambrian and Early Cambrian rocks that experienced deformation and metamorphism in the Cambrian (Foden et al, 2006).…”

Section: Geologymentioning

confidence: 99%

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An Electrical Conductivity Model of the Southeast Australian Lithosphere

Robertson

Taylor²,

Thiel

et al. 2013

ASEG Extended Abstracts

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Section: Geologymentioning

confidence: 99%

“…The orogen consists of Precambrian and Early Cambrian rocks that experienced deformation and metamorphism in the Cambrian (Foden et al, 2006). The Delamerian Orogen separates the older Precambrian cratons to the west from the younger Palaeozoic to Mesozoic orogenic belts of eastern Australia.…”

Section: Geologymentioning

confidence: 99%

An Electrical Conductivity Model of the Southeast Australian Lithosphere

Robertson

Taylor²,

Thiel

et al. 2013

ASEG Extended Abstracts

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“…The oldest Phanerozoic CFBP, Kalkarindji, covers a large tract of northern Australia. It was erupted onto the North Australian Craton during the mid-Cambrian period between 511 -505 ± 2 Ma (Glass and Phillips, 2006;Evins et al, 2009;Jourdan et al, 2014), which formed part of Gondwana (Foden et al, 2006;Torsvik and Cocks, 2009;Cocks and Torsvik, 2013). The composition and morphology of CFBP lavas are known to vary significantly within a province (Walker, 1971;Bondre et al, 2004;Single and Jerram, 2004;Bryan et al, 2010;Brown et al, 2011;Duraiswami et al, 2014), but the common CFBP lava emplacement mode is as extensive pāhoehoe flow fields emplaced by a process of endogenous inflation, as observed occurring on the flanks of modern day shield volcanoes such as in Hawai'i (Self et al, 1997Thordarson and Self, 1998;Bondre et al, 2004;Single and Jerram, 2004;Jerram and Widdowson, 2005;Waichel et al, 2006;Vye-Brown et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The Giant Lavas of Kalkarindji: rubbly pāhoehoe lava in an ancient continental flood basalt province

Marshall

Widdowson

Murphy

2016

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Kalkarindji continental flood basalt province of northern Australia erupted in the mid Cambrian . It now consists of scattered basaltic lava fields, the most extensive being the Antrim Plateau Volcanics (APV) -a semi-continuous outcrop (c. 50,000 km 2 ) reaching a maximum thickness of 1.1 km. Cropping out predominately in the SW of the APV, close to the top of the basalt succession, lies the Blackfella Rockhole Member (BRM). Originally described as 'basaltic agglomerate' the BRM has, in recent years, been assumed to be explosive tephra of phreatomagmatic origin, thus providing a potent vehicle for volatile release to the upper atmosphere. Our detailed field investigations reveal that this basaltic agglomerate is, in reality, giant rubble collections (15 -20 m thick) forming the upper crusts of rubbly pāhoehoe lava units 25 -40 m thick; covering 18,000 -72,000 km 2 and an estimated volume of 1,500 -19,200 km 3 . These flows, rheologically but not chemically, distinct from the majority of Kalkarindji lavas, indicate a fundamental change in eruption dynamics. A low volatile content, induced high amounts of pre-eruptive degassing causing super-cooling and an increase in crystal nucleation and viscosity. A more viscous lava and a consistently faster rate of effusion (analogous to that of Laki, Iceland) created the flow dynamics necessary to disturb the lava crust to the extent seen in the BRM. Volatile release is estimated at 1.65 × 10 4 -2.11 × 10 5 Tg total CO2 at a rate of 867 Tg a -1 and 9.07 × 10 3 -1.16 × 10 5 Tg SO2 at 476.50 Tg a -1 . These masses accounted for 0.5% of Cambrian atmospheric conditions whilst limiting factors reduced the effect of volatile delivery to the atmosphere, thus any potential global impact caused by these flows alone was minimal.

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“…Twenty years of field mapping and university geochemical research (Foden et al, 2006) suggested the tectonic setting in western Victoria had been an Andeantype convergent margin during the Cambrian. A 2009 AUSCOPE deep seismic transect over western Victoria imaged crustal geometry consistent with an ancient subduction zone; a distinct, largely intact igneous edifice buried at shallow to deep levels beneath Late Cambrian Nargoon Group metasediments.…”

Section: Introductionmentioning

confidence: 99%

“…Connectivity between large buried parts of the Miga Arc and intermediate metavolcanics contained within fault slices exposed at the surface (Mount Stavely Volcanic Complex) has been established. Southeast of the Grampians the Stavely and Dryden Belts are interpreted as fault slices of Miga Arc (Buckland, 1987;Scheibner, 1985;Crawford, 1988;Cayley & Taylor, 2001;Foden et al, 2006), as are some fault slices linking the Stavely and Dryden Belts (eg. Mount Elliot; Cayley & Taylor, 2001).…”

Section: Introductionmentioning

confidence: 99%