Combined Li?He isotopes in Iceland and Jan Mayen basalts and constraints on the nature of the North Atlantic mantle

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F11%3A00000004" target="_blank" >RIV/00025798:_____/11:00000004 - 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

Combined Li?He isotopes in Iceland and Jan Mayen basalts and constraints on the nature of the North Atlantic mantle

Popis výsledku v původním jazyce

Basaltic glasses from the Hengill fissure system, Iceland, define an inverse trend in d7Li vs. 3He/4He space. The highest 3He/4He of 20 RA is associated with ?normal? mantle d7Li of 3.8?. Despite light O isotope compositions and positive Eu and Nb anomalies, the high-3He/4He component carries no evident Li isotope trace of being the product of recycling of altered slab or wedge material. The high d7Li (>6.9?) component with lower 3He/4He includes samples with elevated Nb/U, Sr/Nd and excess Eu providingevidence of a cumulate enriched source that may also be part of an ancient altered ocean floor slab. Jan Mayen basalts (d7Li=3.9?4.7?) are characterized by large degrees of enrichment in ITE providing evidence for a third source with EM-like characteristics. Therefore, oceanic basalts can display a wide range in He isotope compositions, and trace element compositions, associated with recycled components whilst exhibiting no sign of surface-altered slab or wedge material from the Li isot

Název v anglickém jazyce

Combined Li?He isotopes in Iceland and Jan Mayen basalts and constraints on the nature of the North Atlantic mantle

Popis výsledku anglicky

Basaltic glasses from the Hengill fissure system, Iceland, define an inverse trend in d7Li vs. 3He/4He space. The highest 3He/4He of 20 RA is associated with ?normal? mantle d7Li of 3.8?. Despite light O isotope compositions and positive Eu and Nb anomalies, the high-3He/4He component carries no evident Li isotope trace of being the product of recycling of altered slab or wedge material. The high d7Li (>6.9?) component with lower 3He/4He includes samples with elevated Nb/U, Sr/Nd and excess Eu providingevidence of a cumulate enriched source that may also be part of an ancient altered ocean floor slab. Jan Mayen basalts (d7Li=3.9?4.7?) are characterized by large degrees of enrichment in ITE providing evidence for a third source with EM-like characteristics. Therefore, oceanic basalts can display a wide range in He isotope compositions, and trace element compositions, associated with recycled components whilst exhibiting no sign of surface-altered slab or wedge material from the Li isot

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

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2011

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

75

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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