Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F12%3A51803" target="_blank" >RIV/60460709:41330/12:51803 - 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

Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite

Popis výsledku v původním jazyce

Refractory inclusions in primitive meteorites are the oldest objects formed in the Solar System. They exhibit large mass-dependent isotopic effects in many elements, including Si, Mg and Ca, indicative of their complex origin. We report data for both mass dependent (d) and mass-independent (e) Ca isotopic effects, and rare earth element (REE) abundances in six refractory inclusions from the Allende meteorite. Data reveal mass-dependent Ca isotopic effects in these refractory inclusions, with d44/40Ca ranging from -5.60 to +0.35, which are significantly lower than that of the bulk silicate Earth. Importantly, d44/40Ca is correlated with REE patterns: refractory inclusions with Group II REE patterns have lighter Ca isotope compositions compared to thosewith Group I REE patterns. The studied refractory inclusions form negative 44Ca/40Ca-Tm/Er trends, implying segregation of up to 3% of an ultrarefractory evaporation residue from a chondritic reservoir prior to the formation of refractory

Název v anglickém jazyce

Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite

Popis výsledku anglicky

Refractory inclusions in primitive meteorites are the oldest objects formed in the Solar System. They exhibit large mass-dependent isotopic effects in many elements, including Si, Mg and Ca, indicative of their complex origin. We report data for both mass dependent (d) and mass-independent (e) Ca isotopic effects, and rare earth element (REE) abundances in six refractory inclusions from the Allende meteorite. Data reveal mass-dependent Ca isotopic effects in these refractory inclusions, with d44/40Ca ranging from -5.60 to +0.35, which are significantly lower than that of the bulk silicate Earth. Importantly, d44/40Ca is correlated with REE patterns: refractory inclusions with Group II REE patterns have lighter Ca isotope compositions compared to thosewith Group I REE patterns. The studied refractory inclusions form negative 44Ca/40Ca-Tm/Er trends, implying segregation of up to 3% of an ultrarefractory evaporation residue from a chondritic reservoir prior to the formation of refractory

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

2012

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

2012

Číslo periodika v rámci svazku

77

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

14

Strana od-do

252-265

Kód UT WoS článku

000299010400017

EID výsledku v databázi Scopus

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