The DOUNCE event at the top of the Ediacaran Doushantuo Formation, South China: Broad stratigraphic occurrence and non-diagenetic origin

Miao, Lu; Zhu, Maoyan; Zhang, Junming; Shields, Graham A.; Li, Guoxiang; Zhao, Fangchen; Zhao, Xin; Zhao, Meijuan

doi:10.1016/j.precamres.2011.10.018

Cited by 114 publications

(104 citation statements)

References 60 publications

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“…If the model of a shallow SMTZ is true for the Shuram Excursion, it could explain a variety of sedimentological observations. For example, the Shuram Excursion is globally recorded by bedded micritic limestone (instead of dolomite) independent of sedimentary facies (Melezhik et al, 2009;Grotzinger et al, 2011;Bergmann, 2013;Lu et al, 2013;Husson et al, 2015b). The dominance of limestone in this interval may well reflect an episode of enhanced authigenic mineralization of calcite (or initially aragonite, see Husson et al, 2015a).…”

Section: Authigenic Barite Mineralization In Smtzmentioning

confidence: 99%

“…Please refer to the supplementary material for detailed field and petrographic observations. The variable expression of the δ 13 C negative excursion in the uppermost Doushantuo Formation across the basin Lu et al, 2013;Cui et al, 2015;Wang et al, 2016) hampers our interpretation of its origin and global implications (Fig. 8A, J).…”

mentioning

confidence: 93%

“…A pronounced negative δ 13 C excursion in the uppermost Doushantuo Formation in the Yangtze Gorges area of South China is widely regarded as an equivalent of the Shuram Excursion (Jiang et al, 2007;McFadden et al, 2008;Lu et al, 2013;Tahata et al, 2013;Wang et al, 2016;Xiao et al, 2016). However in outer-shelf environment, this excursion is only expressed by a few negative δ 13 C data points (Zhou and Xiao, 2007;Zhu et al, 2007;Li et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…This model assumes a widespread terrestrial biosphere during the Ediacaran Period (Fig. 13B), and has been widely adopted as a universal criterion for diagenetic evaluation in chemostratigraphic studies (e.g., Xiao et al, 2012;Lu et al, 2013;Tahata et al, 2013;Osburn et al, 2015;Schobben et al, 2016).…”

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confidence: 99%

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Was the Ediacaran Shuram Excursion a globally synchronized early diagenetic event? Insights from methane-derived authigenic carbonates in the uppermost Doushantuo Formation, South China

et al. 2017

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The Ediacaran Period is characterized by the most profound negative carbon isotope (δ 13 C) excursion in Earth history, the Shuram Excursion. Various hypotheses -including the massive oxidation of dissolved organic carbon (DOC) in the oceans, the weathering of terrestrial organic carbon, or the release and oxidation of methane hydrates and/or expelled petroleum from the subsurface -have been proposed as sources of the 13 C-depleted carbon. More recently, it has been suggested that global-scale precipitation of early authigenic carbonates, driven by anaerobic microbial metabolism in unconsolidated sediments, may have caused the Shuram Excursion, but empirical evidence is lacking. Here we present a comprehensive analysis of a Shuram-associated interval from the uppermost Doushantuo Formation in South China. Our study reveals petrographic evidence of methane-derived authigenic calcite (formed as early diagenetic cements and nodules) that are remarkably depleted in 13 C -suggesting a buildup of alkalinity in pore fluids through the anaerobic oxidation of methane (AOM) -and systematically depleted in 18 O relative to co-occurring dolomite. Early authigenesis of these minerals is likely to be driven by increased microbial sulfate reduction, triggered by enhanced continental weathering in the context of a marked rise in atmospheric oxygen levels. In light of the finding of methane-derived authigenic carbonates at Zhongling, and based on our basin-scale stratigraphic correlation, we hypothesize that the marked 13 C and 18 O depletion (including their co-variation noted worldwide) in the Shuram Excursion may reflect an episode of authigenesis occurring within a sulfate-methane transition zone (SMTZ). If true, the Shuram Excursion was then a global biogeochemical response to enhanced seawater sulfate concentration in the Ediacaran ocean driven by the Neoproterozoic oxidation of surface environments. This paleo-oceanographic transition may have therefore paved the way for subsequent evolution and diversification of animals. Our study highlights the significance of an integrated approach that combines petrography, mineralogy, and texture-specific micro-drilling geochemistry in chemostratigraphic studies.

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Section: Authigenic Barite Mineralization In Smtzmentioning

confidence: 99%

mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Was the Ediacaran Shuram Excursion a globally synchronized early diagenetic event? Insights from methane-derived authigenic carbonates in the uppermost Doushantuo Formation, South China

et al. 2017

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“…While the thickness and lithology vary in different depositional facies, the Doushantuo Formation in slope/basinal facies (e.g., the Siduping section in Hunan Province and the Wuhe section in Guizhou Province, as well as the Lantian Formation in southern Anhui Province) can be easily correlated with the Doushantuo Formation in the Yangtze Gorges area (i.e., Jiulongwan section) (Jiang et al, 2007;Wang et al, 2016Wang et al, , 2017aYuan et al, 2011). This correlation is further supported by numerous C and Sr isotope chemostratigraphic studies (Jiang et al, 2007;Lu et al, 2013;Wang et al, 2016;Zhu et al, 2007Zhu et al, , 2013.…”

Section: Stratigraphic Correlation Of the Doushantuo Formation Betweementioning

confidence: 65%

Acanthomorphic acritarchs of the Doushantuo Formation from an upper slope section in northwestern Hunan Province, South China, with implications for early–middle Ediacaran biostratigraphy

Ouyang

Guan

Zhou

et al. 2017

Precambrian Research

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a b s t r a c t Doushantuo-Pertatataka acritarchs (DPAs) are abundant and well preserved in the Ediacaran Doushantuo Formation in South China. Not only do they provide insights into the marine ecosystem immediately after a Neoproterozoic global glaciation, they also afford us an ideal tool for Ediacaran stratigraphic subdivision and correlation. However, previous reports of DPAs in South China are mostly from the Yangtze Gorges area in intra-shelf basin and from Weng'an in shelf margin environments, while data from localities in slope and basinal facies are lacking. Here we present lithostratigraphy, carbon and strontium isotope chemostratigraphy, and acritarch biostratigraphy of the Doushantuo Formation from an upper slope section at Lujiayuanzi in northwestern Hunan Province, South China. Five DPA genera and eight species are preserved in the Doushantuo Formation chert nodules, with the uppermost two DPA horizons occurring above a d 13 C negative excursion that is correlated with the EN3/Shuram excursion based on integrated litho-and chemostratigraphic correlation. Our new findings reveal a broader temporal and spatial distribution of DPAs in South China, and further support their biostratigraphic potential in the early-middle Ediacaran subdivision and correlation.

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Ediacaran microfossils from the Doushantuo Formation chert nodules in the Yangtze Gorges area, South China, and new biozones

Moczydłowska

2019

Fossils and Strata

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The DOUNCE event at the top of the Ediacaran Doushantuo Formation, South China: Broad stratigraphic occurrence and non-diagenetic origin

Cited by 114 publications

References 60 publications

Was the Ediacaran Shuram Excursion a globally synchronized early diagenetic event? Insights from methane-derived authigenic carbonates in the uppermost Doushantuo Formation, South China

Was the Ediacaran Shuram Excursion a globally synchronized early diagenetic event? Insights from methane-derived authigenic carbonates in the uppermost Doushantuo Formation, South China

Acanthomorphic acritarchs of the Doushantuo Formation from an upper slope section in northwestern Hunan Province, South China, with implications for early–middle Ediacaran biostratigraphy

Ediacaran microfossils from the Doushantuo Formation chert nodules in the Yangtze Gorges area, South China, and new biozones

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