A chemostratigraphic overview of the late Cryogenian interglacial sequence in the Adelaide Fold-Thrust Belt, South Australia

McKirdy, David M.; Burgess, Jamie M.; Lemon, Nicholas M.; Yu, Xinke; Cooper, J. Andrew G.; Gostin, Victor A.; Jenkins, Richard; Both, R. A.

doi:10.1016/s0301-9268(00)00130-3

Cited by 136 publications

(84 citation statements)

References 73 publications

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“…Marinoan glacial-cap carbonate sequence (Kennedy 1996;Kennedy et al 1998;Hoffman et al 1998;Hoffmann & Schrag 2002;Hoffmann et al 2004;Halverson et al 2002Halverson et al , 2005Condon et al 2005;Zhang et al 2008); and (iii) the late Neoproterozoic Wonoka-Shuram anomaly (Burns & Matter 1993;Calver 2000;McKirdy et al 2001;Fike et al 2006;Le Guerroué et al 2006;Rieu et al 2007). Our data provide, for the first time, globally comparative C-isotope events through the Dalradian.…”

mentioning

confidence: 59%

A composite C-isotope profile for the Neoproterozoic Dalradian Supergroup of Scotland and Ireland

Prave

Fallick

Thomas

et al. 2009

JGS

106

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mentioning

confidence: 59%

A composite C-isotope profile for the Neoproterozoic Dalradian Supergroup of Scotland and Ireland

Prave

Fallick

Thomas

et al. 2009

JGS

106

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“…Typical early post-Sturtian strontium isotope compositions are ~0.7067-0.7069, rapidly rising to a plateau of 0.7071-0.7073, with a single (pre-Trezona anomaly) value as high as 0.70735 (Kaufman et al, 1997;Shields et al, 1997;McKirdy et al, 2001;Halverson et al, 2007). Early Ediacaran 87 Sr/ 86 Sr values are nearly identical to typical pre-Marinoan values: ~0.7072 (James et al, 2001;, but these rise sharply to ratios in excess of 0.7077 within the basal Ediacaran cap carbonate sequence (Halverson et al, 2010).…”

Section: Sr Isotope Chemostratigraphymentioning

confidence: 99%

“…The most comprehensive studies have been performed on thick carbonate successions in South Australia (e.g. McKirdy et al, 2001;Giddings and Wallace 2009a, b;Rose et al, 2012;Hood & Wallace, 2014, 2015Wallace et al, 2015) and Namibia (Halverson et al, 2002(Halverson et al, , 2005Hoffman and Schrag, 2002;Hurtgen et al, 2002;Hoffman and Halverson, 2008;Hoffman, 2011), and mixed carbonate-siliciclastic sediments of NW Canada (Hofmann et al, 1990;Narbonne and Aitken, 1995;Day et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

Fairchild

Bonnand²,

Davies

et al. 2016

Precambrian Research

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms At the base of E3, interstratification of cap carbonate with ice-rafted and redeposited glacial sediments occurs. Early diagenetic stabilization of carbonate mineralogy from a precursor, possibly ikaite, to calcite or dolomite is inferred. E3 is predominantly dolomitic silt-shale, with sub-millimetre lamination, lacking sand or current-related sedimentary structures. Thin fine laminae are partly pyritized and interpreted as microbial mats. Dolomite content is 25-50%, with δ 13 C values consistently around +4‰, a value attributed to buffering by dissolution of a precursor metastable carbonate phase. Local calcite cement associates with low δ 13 C values. The carbonates form silt-sized, chemically zoned rhombic crystals from an environment with dynamically changing Fe and Mn. Three-dimensional reconstructions of cm-scale disturbance structures indicate that they represent horizontally directed sock-like folds, developed by release of overpressure into thin surficial sediment overlying an early-cemented layer.A shoaling upwards unit near the top of E3 displays calcium sulphate pseudomorphs in dolomite in the north, but storm-dominated limestones in the south, both being overlain by peritidal oolitic dolomites, exposed under the succeeding Wilsonbreen glacial deposits. There is no Trezona δ 13 C anomaly, possibly implying top-truncation of the succession.Regular 0.5 m-scale sedimentary rhythms, reflecting subtle variations in sediment texture or composition occur throughout E3 and are interpreted as allocyclic. They are thought to be mainly primary in origin, locally modified slightly during early diagenetic cementation. Rhythms are proposed to represent ca. 18 kyr precession cycles, implying 6-8 Myr deposition between glaciations.

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“…Os valores da razão isotópica de carbono permitem interpretar um cenário pós-glacial submetido a um aquecimento e aumento da matéria orgânica no sistema marinho. Esse comportamento de aumento gradual do δ 13 C PDB é comum nas seções pós-esturtianas do Subgrupo Abenab na Namíbia, Grupo Umberatana na Austrália e nas formações Twitya e Keele no Canadá , James et al 2001, McKirdy et al 2001, Hoffman & Schrag 2002, Halverson et al 2005.…”

Section: Isótopos De Estrônciounclassified

Variações dos isótopos de C e Sr em carbonatos pré e pós-glaciação Jequitaí (Esturtiano) na região de Bezerra-Formosa, Goiás

Alvarenga

Giustina

Silva

et al. 2007

RBG

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A chemostratigraphic overview of the late Cryogenian interglacial sequence in the Adelaide Fold-Thrust Belt, South Australia

Cited by 136 publications

References 73 publications

A composite C-isotope profile for the Neoproterozoic Dalradian Supergroup of Scotland and Ireland

A composite C-isotope profile for the Neoproterozoic Dalradian Supergroup of Scotland and Ireland

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

Variações dos isótopos de C e Sr em carbonatos pré e pós-glaciação Jequitaí (Esturtiano) na região de Bezerra-Formosa, Goiás

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