Coupled sulfur, iron and molybdenum isotope data from black shales of the Teplá-Barrandian unit argue against deep ocean oxygenation during the Ediacaran

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F15%3A00000168" target="_blank" >RIV/00025798:_____/15:00000168 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/journal/00167037/171" target="_blank" >http://www.sciencedirect.com/science/journal/00167037/171</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.gca.2015.08.022" target="_blank" >10.1016/j.gca.2015.08.022</a>

Result language
angličtina
Original language name
Coupled sulfur, iron and molybdenum isotope data from black shales of the Teplá-Barrandian unit argue against deep ocean oxygenation during the Ediacaran
Original language description
Here we present the major and trace element composition as well as Mo, S and Fe isotopic data of organic-rich black shales from the Teplá-Barrandian unit, Czech Republic . New in situ zircon U-Pb age constraints provide a maximum depositional age of 559.8 ? 3.8 million years. Black shales with strongest metal enrichment show low ?56Fe values due to the excess of authigenic pyrite-Fe with ?56Fe values around -0.6 ? over detrital Fe with ?56Fe values around 0.1 ?. Periods of reduced authigenic metal enrichment show relatively lower Mo/TOC ratios and increasing ?34S values, which could reflect basinal restriction and longer seawater renewal times. Similar to the modern Black Sea, the accompanied depletion of basinal Moaq due to near quantitative Mo removal might have enabled the preservation of the seawater ?98Mo in respective black shales. Our best estimate for this seawater Mo isotopic composition ;560 million years ago is +1.2 ? in ?98Mo, which is nearly identical to inferred seawater
Czech name
—
Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DD - Geochemistry
OECD FORD branch
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Project
<a href="/en/project/GA13-15390S" target="_blank" >GA13-15390S: Re-Os geochronology of ore mineralizations from the Bohemian Massif with possible metallogenic implications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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