Microanalysis of carbonate cement δ18O in a CO2-storage system seal: Insights into the diagenetic history of the Eau Claire Formation (Upper Cambrian), Illinois Basin

Śliwiński, Maciej G.; Kozdon, Reinhard; Kitajima, Kouki; Denny, Adam; Valley, John W.

doi:10.1306/02031615065

Cited by 15 publications

(5 citation statements)

References 48 publications

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“…More detailed studies that combine petrographic, mineralogical, and fabric-specific geochemical investigations (e.g., Talbot and Kelts, 1986;Kozdon et al, 2013;Bojanowski et al, 2015;Lash, 2015;Godet et al, 2016;Śliwiński et al, 2016;Thomazo et al, 2016;Zhao et al, 2016) are needed to test these hypotheses for δ 13 C excursions throughout Earth's history.…”

Section: Beyond the Shuram Excursionmentioning

confidence: 99%

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: Beyond the Shuram Excursionmentioning

confidence: 99%

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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“…Secondary ion mass spectrometry (SIMS) or Nano secondary ion mass spectrometry (Nano-SIMS) are the effective methods for in situ oxygen isotope analysis of carbonate or quartz cements, which are characterized by high-precision, high-accuracy, high-spatial resolution in isotope analysis (Harwood et al, 2013;Śliwiński et al, 2016). When using this method for isotope analysis, the samples are prepared as thin sections firstly.…”

Section: Nano Secondary Ion Mass Spectrometry (Nano Sims) In Carbonatmentioning

confidence: 99%

Applications of Light Stable Isotopes (C, O, H) in the Study of Sandstone Diagenesis: A Review

Cao

Lin

et al. 2019

Acta Geologica Sinica (Eng)

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This article reviews the applications of light stable isotope, including carbon, oxygen and hydrogen, in the studies on origin and formation temperature of authigenic carbonate, quartz and clay minerals. Theoretical knowledge and analytical methods for major light stable isotopes are introduced in detail. Negative and positive δ 13 C values indicate significant differences on the origin of carbonate cements. The δ 18 O value is an effective palaeotemperature scale for authigenic minerals formation. Various fractionation equations between δ 18 O and temperature are proposed for carbonate cements, quartz cements and clay minerals, whose merit and demerit, applicable conditions are clarified clearly. Clumped isotope analysis can reconstruct the temperature of carbonate precipitation with no requirement on the δ 18 O of initial waters, which makes temperature calculation of carbonate cements formation more convenient and accurate. Hydrogen and oxygen isotopes mainly reflect the origin of diagenetic fluid for clay mineral formation, providing reliable evidence for diagenetic environment analysis. This work aims at helping researchers for better understanding the applications of light stable isotope in sandstone diagenesis.

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“…Within the diverse suite of lithofacies that comprise the Eau Claire shale, carbonate cements are generally abundant, although somewhat heterogeneously distributed (e.g., Finley, 2005;Neufelder et al, 2012;Palkovic, 2015;Śliwiński et al, 2016). Carbon mineralization reactions are especially anticipated to occur along the reservoir-caprock interface where reactive Fe-rich clay minerals and carbonate cements occur in abundance (Finley, 2005).…”

Section: Part I: Relevance To the Illinois Basin Decatur Projectmentioning

confidence: 99%

In situ δ13C and δ18O microanalysis by SIMS: A method for characterizing the carbonate components of natural and engineered CO2-reservoirs

Śliwiński

Kitajima

Kozdon

et al. 2017

International Journal of Greenhouse Gas Control

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This work addresses the potential utility of in situ carbon and oxygen isotope microanalysis (δ 13 C and δ 18 O) by secondary ion mass spectrometry (SIMS) in carbon sequestration research. A desirable long-term consequence of CO 2-injection into underground rock formations at prospective sequestration sites (such as deep saline sandstone aquifers capped by impermeable strata) is the precipitation of carbonate mineral cements, the isotopic fingerprinting of which is a central theme here. More specifically, we focus on the unique advantage of the SIMS technique, which lies in the capability of analyzing very small sample volumes that are otherwise inaccessible to sampling techniques in conventional isotope ratio mass spectrometry (IRMS). For example, single carbonate crystallites as small as 3-10 µm across can be readily analyzed by SIMS with sub per-mil (‰) accuracy and precision. Importantly, the ability to perform micrometer-scale measurements in situ from either thin sections or 1-inch (25 mm) diameter polished core plugs preserves the petrographic context of measured carbonate δ 18 O and δ 13 C values. We provide a preliminary characterization of the pre-injection mineralogy and isotopic fingerprints of carbonate cements in the Mount Simon Sandstone reservoir and the overlying shaly caprock (the Eau Claire Formation) at the Illinois Basin Decatur Project, a demonstration and research site for exploring the feasibility of long-term CO 2 storage in a deep saline aquifer. By drawing upon published data on ambient reservoir conditions and the isotopic composition of the injected CO 2 , we make simple predictions regarding possible δ 13 C values of calcite, dolomite-ankerite, and siderite cements that may form in response to long-term CO 2 storage.

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Microanalysis of carbonate cement δ18O in a CO2-storage system seal: Insights into the diagenetic history of the Eau Claire Formation (Upper Cambrian), Illinois Basin

Cited by 15 publications

References 48 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

Applications of Light Stable Isotopes (C, O, H) in the Study of Sandstone Diagenesis: A Review

In situ δ13C and δ18O microanalysis by SIMS: A method for characterizing the carbonate components of natural and engineered CO2-reservoirs

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