The Phanerozoic delta 88/86Sr Record of Seawater: New Constraints on Past Changes in Oceanic Carbonate Fluxes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F14%3A61222" target="_blank" >RIV/60460709:41330/14:61222 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Phanerozoic delta 88/86Sr Record of Seawater: New Constraints on Past Changes in Oceanic Carbonate Fluxes

Popis výsledku v původním jazyce

The isotopic composition of Phanerozoic marine sediments provides important information about changes in seawater chemistry. In particular, the radiogenicstrontium isotope (87Sr/86Sr) system is a powerful tool for constraining plate tectonic processes and their influence on atmospheric CO2 concentrations. However, the 87Sr/86Sr isotope ratio of seawater is not sensitive to temporal changes in the marine strontium (Sr) output flux, which is primarily controlled by the burial of calcium carbonate (CaCO3)at the ocean floor. The Sr budget of the Phanerozoic ocean, including the associated changes in the amount of CaCO3 burial, is therefore only poorly constrained. Here, we present the first stable isotope record of Sr for Phanerozoic skeletal carbonates,and by inference for Phanerozoic seawater (delta 88/86Srsw), which we find to be sensitive to imbalances in the Sr input and output fluxes. This delta 88/86Srsw record varies from ~0,25 to 0,60 (vs. SRM987) with a mean of 0,37. The fracti

Název v anglickém jazyce

The Phanerozoic delta 88/86Sr Record of Seawater: New Constraints on Past Changes in Oceanic Carbonate Fluxes

Popis výsledku anglicky

The isotopic composition of Phanerozoic marine sediments provides important information about changes in seawater chemistry. In particular, the radiogenicstrontium isotope (87Sr/86Sr) system is a powerful tool for constraining plate tectonic processes and their influence on atmospheric CO2 concentrations. However, the 87Sr/86Sr isotope ratio of seawater is not sensitive to temporal changes in the marine strontium (Sr) output flux, which is primarily controlled by the burial of calcium carbonate (CaCO3)at the ocean floor. The Sr budget of the Phanerozoic ocean, including the associated changes in the amount of CaCO3 burial, is therefore only poorly constrained. Here, we present the first stable isotope record of Sr for Phanerozoic skeletal carbonates,and by inference for Phanerozoic seawater (delta 88/86Srsw), which we find to be sensitive to imbalances in the Sr input and output fluxes. This delta 88/86Srsw record varies from ~0,25 to 0,60 (vs. SRM987) with a mean of 0,37. The fracti

Druh

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

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

GEOCHIMICA ET COSMOCHIMICA ACTA

ISSN

0016-7037

e-ISSN

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Svazek periodika

2014

Číslo periodika v rámci svazku

128

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

17

Strana od-do

249-265

Kód UT WoS článku

000331105700017

EID výsledku v databázi Scopus

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