The Homerian (late Wenlock, Silurian) carbon isotope excursion from Perunica: does dolomite control the magnitude of the carbon isotope excursion?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F16%3A70661" target="_blank" >RIV/60460709:41330/16:70661 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1139/cjes-2015-0188" target="_blank" >http://dx.doi.org/10.1139/cjes-2015-0188</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1139/cjes-2015-0188" target="_blank" >10.1139/cjes-2015-0188</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Homerian (late Wenlock, Silurian) carbon isotope excursion from Perunica: does dolomite control the magnitude of the carbon isotope excursion?

Popis výsledku v původním jazyce

The delta13Ccarb records from two geographically close sections of the shallow-water Kozel Limestone Member (late Wenlock Motol Formation, Perunica microplate) significantly differ in the magnitude of the Homerian carbon isotope excursion as well as in their dolomite content. The present paper tests a hypothesis as to whether a difference of about 0,2% in the magnitude of the delta13Ccarb anomaly is caused by the different content of dolomite, which could be enriched in both 13C and 18O relative to coexisting calcite, as has been suggested by experimental data. The new data obtained reveal that the ?18O composition of calcite and dolomite was probably controlled by the pore fluid composition during limestone diagenesis and that both carbonates seem to be close to equilibrium in oxygen isotope composition. On the other hand, the delta13C values of dolomite are similar to those of calcite and thus the carbon isotope composition of both carbonates was probably determined by the precursor carbonate compo

Název v anglickém jazyce

The Homerian (late Wenlock, Silurian) carbon isotope excursion from Perunica: does dolomite control the magnitude of the carbon isotope excursion?

Popis výsledku anglicky

The delta13Ccarb records from two geographically close sections of the shallow-water Kozel Limestone Member (late Wenlock Motol Formation, Perunica microplate) significantly differ in the magnitude of the Homerian carbon isotope excursion as well as in their dolomite content. The present paper tests a hypothesis as to whether a difference of about 0,2% in the magnitude of the delta13Ccarb anomaly is caused by the different content of dolomite, which could be enriched in both 13C and 18O relative to coexisting calcite, as has been suggested by experimental data. The new data obtained reveal that the ?18O composition of calcite and dolomite was probably controlled by the pore fluid composition during limestone diagenesis and that both carbonates seem to be close to equilibrium in oxygen isotope composition. On the other hand, the delta13C values of dolomite are similar to those of calcite and thus the carbon isotope composition of both carbonates was probably determined by the precursor carbonate compo

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA15-13310S" target="_blank" >GA15-13310S: Stopování kontinentálního zvětrávání pomocí izotopů Cr ve středním paleozoiku: implikace pro přínos živin a jejich vliv na mořskou evoluci</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

CANADIAN JOURNAL OF EARTH SCIENCES

ISSN

0008-4077

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

693-701

Kód UT WoS článku

000372381500017

EID výsledku v databázi Scopus

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