Significant carbon isotope excursions in the Cambrian and their implications for global correlations

Fan, Ruihua; Deng, Shuai; Zhang, Xuelei

doi:10.1007/s11430-011-4313-z

Cited by 37 publications

(16 citation statements)

References 55 publications

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“…6), with previous studies of emissions from Kalkarindji suggesting that these eruptions were unlikely to have caused any significant impact on the atmospheric compositions at that time (Marshall et al, 2016). This is not to say that Kalkarindji did not cause any environmental change, previous C-isotope excursion studies in the mid-late Cambrian show significant changes were occurring in this period (Fan et al, 2011).…”

Section: Multiple Stages Of Magmatismmentioning

confidence: 76%

New ⁴⁰ Ar/ ³⁹ Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

Marshall

Halton

Kelley

et al. 2018

JGS

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Section: Multiple Stages Of Magmatismmentioning

confidence: 76%

New ⁴⁰ Ar/ ³⁹ Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

Marshall

Halton

Kelley

et al. 2018

JGS

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“…The ZHUCE (also referred to as I' in Siberian sections, 6p in Maloof et al, 2010a, L4 in Landing et al, 2013;Li et al, 2009) is named for the positive δ 13 C excursion identified on the Yangtze Platform in South China (Zhu et al, 2006), and follows a major radiation of the first mineralised organisms within the Cambrian period, including shelly fossils. Positive δ 13 C values associated with the ZHUCE occur just after the transition between the undefined Fortunian -Stage 2 boundary (Fan et al, 2011).…”

Section: The Zhujiaqing Carbon-isotope Excursion ("Zhuce")mentioning

confidence: 98%

Early Cambrian chronostratigraphy and geochronology of South Australia

Betts

Paterson

Jacquet

et al. 2018

Earth-Science Reviews

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The most successful chronostratigraphic correlation methods enlist multiple proxies such as biostratigraphy and chemostratigraphy to constrain the timing of globally important bio-and geo-events. Here we present the first regional, high-resolution shelly fossil biostratigraphy integrated with  13 C chemostratigraphy (and corresponding  18 O data) from the lower Cambrian of South Australia. The global ZHUCE, SHICE, positive excursions II and III and the CARE are captured in lower Cambrian successions from the Arrowie and Stansbury basins. The South Australian shelly fossil biostratigraphy has a consistent relationship with the δ 13 C results, bolstering interpretation, identification and correlation of the excursions. Positive excursion II straddles the boundary between the Kulparina rostrata and Micrina etheridgei zones, and the CARE straddles the boundary between the M. etheridgei and Dailyatia odyssei zones, peaking in the lower parts of the latter zone. New 3 CA-TIMS zircon dates from the upper Hawker Group and Billy Creek Formation provide calibration points for the upper D. odyssei Zone and corresponding chemostratigraphic curve, embedding the lower Cambrian successions from South Australia into a global chronostratigraphic context. This multi-proxy investigation demonstrates the power of integrated multi-proxy methods for global correlation of regional biostratigraphic schemes, facilitating robust global correlation of lower Cambrian successions from South Australia with coeval terranes on other Cambrian palaeocontinents, including South and North China, Siberia, Laurentia, Avalonia and West Gondwana.

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“…The δ 13 C values of the normal and giant ooids varied from −0.90‰ to −0.46‰ (mean value of −0.65‰) and from −0.44‰ to 0.23‰ (average = −0.06‰), respectively. The micrite from matrix in the ooidal intervals and muddy intervals record a normal-marine signature (Fan, Deng, & Zhang, 2011;Zuo, Peng, & Zhu, 2008). The HREE ratios for the normal and giant ooids ( Figure 9 and Table S2).…”

Section: Geochemical Datamentioning

confidence: 99%

Origin of ooids in ooidal‐muddy laminites: A case study of the lower Cambrian Qingxudong Formation in the Sichuan Basin, South China

et al. 2017

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Ooids have been considered the most intriguing component of carbonate rocks, but the formation mechanism of carbonate ooids remains a matter of intense discussion. The lower Cambrian Qingxudong Formation in the southeastern Sichuan Basin contains abundant ooidal‐muddy laminites. Petrographic and sedimentological analyses revealed that these laminites formed in a shallow‐marine environment (preferably along the windward side of the reef‐shoal). Changing energy conditions caused variable supplies of grainy and muddy accumulation. A wide variety of ooids developed in grainy intervals. The normal ooids (<2 mm in diameter) in the lower portion of the laminites developed under high‐energy shallow‐water conditions, whereas the giant ooids (>2 mm in diameter) in the upper portion of the laminites developed in a deepening and moderate‐energy subtidal environment but were influenced by episodic hydrodynamic events. Petrographic and geochemical analyses suggest that microbes played an important role in ooid formation. High carbonate‐supersaturated and alkaline conditions that were mediated by microbial activity (e.g., bacterial sulfate reduction and photosynthesis) and agitated seawater conditions were the most important factors that mediated the formation of the Qingxudong ooids. This study provides new insights into paleooceanographic conditions during the Early Cambrian and offers a perspective on the formation of ancient normal and giant ooids.

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Significant carbon isotope excursions in the Cambrian and their implications for global correlations

Cited by 37 publications

References 55 publications

New ⁴⁰ Ar/ ³⁹ Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

New ⁴⁰ Ar/ ³⁹ Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

Early Cambrian chronostratigraphy and geochronology of South Australia

Origin of ooids in ooidal‐muddy laminites: A case study of the lower Cambrian Qingxudong Formation in the Sichuan Basin, South China

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Significant carbon isotope excursions in the Cambrian and their implications for global correlations

Cited by 37 publications

References 55 publications

New 40 Ar/ 39 Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

New 40 Ar/ 39 Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

Early Cambrian chronostratigraphy and geochronology of South Australia

Origin of ooids in ooidal‐muddy laminites: A case study of the lower Cambrian Qingxudong Formation in the Sichuan Basin, South China

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New ⁴⁰ Ar/ ³⁹ Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province

New ⁴⁰ Ar/ ³⁹ Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province