Paired δ34S data from carbonate-associated sulfate and chromium-reducible sulfur across the traditional Lower–Middle Cambrian boundary of W-Gondwana

Wotte, Thomas; Strauß, Harald; Fugmann, Artur; Garbe‐Schönberg, Dieter

doi:10.1016/j.gca.2012.02.013

Cited by 42 publications

(21 citation statements)

References 70 publications

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“…The evolution towards more positive δ S values could reflect the development of closed system conditions in the early burial environment with respect to sulfate availability in the pore water realm. Comparably S enriched pyrite sulfur isotope values and a somewhat similar variation across this stratigraphic transition have been observed in other sections of northwest Spain (Wotte et al, 2012), southern France (Wotte et al, 2012), the Siberian Platform (Wotte et al, 2011), the USA (Wotte et al, 2011), and Mexico (Loyd et al, 2012).…”

Section: Sulfur Isotope Chemostratigraphysupporting

confidence: 76%

Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China

Zhao¹,

Yuan²,

Babcock³

et al. 2019

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Section: Sulfur Isotope Chemostratigraphysupporting

confidence: 76%

Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China

Zhao¹,

Yuan²,

Babcock³

et al. 2019

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“…It may be responsible for the absence of short-term excursions in our Phanerozoic [SO 2− 4 ] SW curve (Fig. 3a), since a number of short (< 2 Myr) intervals of strongly elevated ∂δ 34 S SO4 / ∂t rates have been documented for the Phanerozoic (Wortmann and Chernyavsky, 2007;Adams et al, 2010;Gill et al, 2011a,b;Newton et al, 2011;Wotte et al, 2012;Owens et al, 2013;Song et al, 2014;see Sect. 4.3).…”

Section: Cambrian Although the Maximum [So 2−mentioning

confidence: 80%

Reconstruction of secular variation in seawater sulfate concentrations

et al. 2015

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Abstract. Long-term secular variation in seawater sulfate concentrations ([SO42−]SW) is of interest owing to its relationship to the oxygenation history of Earth's surface environment. In this study, we develop two complementary approaches for quantification of sulfate concentrations in ancient seawater and test their application to late Neoproterozoic (635 Ma) to Recent marine units. The "rate method" is based on two measurable parameters of paleomarine systems: (1) the S-isotope fractionation associated with microbial sulfate reduction (MSR), as proxied by Δ34SCAS-PY, and (2) the maximum rate of change in seawater sulfate, as proxied by &partial; δ 34SCAS/∂ t(max). The "MSR-trend method" is based on the empirical relationship of Δ34SCAS-PY to aqueous sulfate concentrations in 81 modern depositional systems. For a given paleomarine system, the rate method yields an estimate of maximum possible [SO42−]SW (although results are dependent on assumptions regarding the pyrite burial flux, FPY), and the MSR-trend method yields an estimate of mean [SO42−]SW. An analysis of seawater sulfate concentrations since 635 Ma suggests that [SO42−]SW was low during the late Neoproterozoic (<5 mM), rose sharply across the Ediacaran–Cambrian boundary (~5–10 mM), and rose again during the Permian (~10–30 mM) to levels that have varied only slightly since 250 Ma. However, Phanerozoic seawater sulfate concentrations may have been drawn down to much lower levels (~1–4 mM) during short (

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“…Carbonate-associated sulfate (CAS) was extracted from dolostone (n = 6) and limestone (n = 2) using the sequential leaching method described by Wotte et al (2012). Powdered samples (91-278 g) were leached with a 10% NaCl solution in order to remove non-CAS components such as secondary sulfates.…”

Section: Stable Isotopesmentioning

confidence: 99%

The role of bacterial sulfate reduction during dolomite precipitation: Implications from Upper Jurassic platform carbonates

et al. 2015

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Paired δ34S data from carbonate-associated sulfate and chromium-reducible sulfur across the traditional Lower–Middle Cambrian boundary of W-Gondwana

Cited by 42 publications

References 70 publications

Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China

Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China

Reconstruction of secular variation in seawater sulfate concentrations

The role of bacterial sulfate reduction during dolomite precipitation: Implications from Upper Jurassic platform carbonates

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