Structural changes in amber due to uranium mineralization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F16%3A00463518" target="_blank" >RIV/67985891:_____/16:00463518 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/16:00463902

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jenvrad.2016.04.004" target="_blank" >http://dx.doi.org/10.1016/j.jenvrad.2016.04.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jenvrad.2016.04.004" target="_blank" >10.1016/j.jenvrad.2016.04.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural changes in amber due to uranium mineralization

Popis výsledku v původním jazyce

The presence of uranium, with a bulk mass fraction of about 1.5 wt% and radiolytic alterations are a feature of Cenomanian amber from Krizany, at the northeastern edge of the North Bohemian Cretaceous uranium ore district. Pores and microcracks in the amber were filled with a mineral admixture, mainly in the form of Zr-Y-REE enriched uraninite. As a result of radiolytic alterations due to the presence of uranium, structural changes were observed in the Krizany amber in comparison with a reference amber from Nove Straseci in central Bohemia; this was of similar age and botanical origin but did not contain elevated levels of uranium. Structural changes involved an increase in aromaticity due to dehydroaromatization of aliphatic cyclic hydrocarbons, loss of oxygen functional groups, an increase in the degree of polymerization, crosslinking of C-C bonds, formation of a three-dimensional hydrocarbon network in the bulk organic matrix, and carbonization of the organic matrix around the uraninite infill.

Název v anglickém jazyce

Structural changes in amber due to uranium mineralization

Popis výsledku anglicky

The presence of uranium, with a bulk mass fraction of about 1.5 wt% and radiolytic alterations are a feature of Cenomanian amber from Krizany, at the northeastern edge of the North Bohemian Cretaceous uranium ore district. Pores and microcracks in the amber were filled with a mineral admixture, mainly in the form of Zr-Y-REE enriched uraninite. As a result of radiolytic alterations due to the presence of uranium, structural changes were observed in the Krizany amber in comparison with a reference amber from Nove Straseci in central Bohemia; this was of similar age and botanical origin but did not contain elevated levels of uranium. Structural changes involved an increase in aromaticity due to dehydroaromatization of aliphatic cyclic hydrocarbons, loss of oxygen functional groups, an increase in the degree of polymerization, crosslinking of C-C bonds, formation of a three-dimensional hydrocarbon network in the bulk organic matrix, and carbonization of the organic matrix around the uraninite infill.

Druh

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

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Journal of Environmental Radioactivity

ISSN

0265-931X

e-ISSN

—

Svazek periodika

158-159

Číslo periodika v rámci svazku

JUL

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

89-101

Kód UT WoS článku

000376699100011

EID výsledku v databázi Scopus

2-s2.0-84962905866