Macrocrystic corundum and Fe?Ti oxide minerals entrained in alkali basalts from the Eger (Ohře) Rift: MgFe3+-rich ilmenite as tracer of an oxidized upper mantle

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F14%3A00432618" target="_blank" >RIV/67985831:_____/14:00432618 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00710-014-0324-8" target="_blank" >http://dx.doi.org/10.1007/s00710-014-0324-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00710-014-0324-8" target="_blank" >10.1007/s00710-014-0324-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Macrocrystic corundum and Fe?Ti oxide minerals entrained in alkali basalts from the Eger (Ohře) Rift: MgFe3+-rich ilmenite as tracer of an oxidized upper mantle

Popis výsledku v původním jazyce

Macrocrysts of corundum, ilmenite, and spinel-group minerals from alluvial deposits of the Eger Rift were studied for composition, texture, and mineral inclusions. All macrocrysts show usually magmatic corrosion textures indicating disequilibrium with the transporting alkali-basalt magma. Corundum grains, exclusively sapphires, were classified by trace-element signatures as magmatic and metamorphic types. Some sapphire grains show erratic compositions that may have resulted from a metasomatic overprint.The inclusion inventory of magmatic corundum suggests crystallization from a differentiated alkaline silicate melt. Corundum itself was never observed as an inclusion mineral. Magnesium- and Fe3+-rich ilmenite, described as typical mantle-derived species, is the dominant heavy mineral in almost all alluvial deposits of the Eger Rift. Most discrete macrocrysts are similar in appearance and composition to kimberlite- and basanite-related ilmenite. Ilmenite included in alluvial corundum an

Název v anglickém jazyce

Macrocrystic corundum and Fe?Ti oxide minerals entrained in alkali basalts from the Eger (Ohře) Rift: MgFe3+-rich ilmenite as tracer of an oxidized upper mantle

Popis výsledku anglicky

Macrocrysts of corundum, ilmenite, and spinel-group minerals from alluvial deposits of the Eger Rift were studied for composition, texture, and mineral inclusions. All macrocrysts show usually magmatic corrosion textures indicating disequilibrium with the transporting alkali-basalt magma. Corundum grains, exclusively sapphires, were classified by trace-element signatures as magmatic and metamorphic types. Some sapphire grains show erratic compositions that may have resulted from a metasomatic overprint.The inclusion inventory of magmatic corundum suggests crystallization from a differentiated alkaline silicate melt. Corundum itself was never observed as an inclusion mineral. Magnesium- and Fe3+-rich ilmenite, described as typical mantle-derived species, is the dominant heavy mineral in almost all alluvial deposits of the Eger Rift. Most discrete macrocrysts are similar in appearance and composition to kimberlite- and basanite-related ilmenite. Ilmenite included in alluvial corundum an

Druh

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

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Mineralogy and Petrology

ISSN

0930-0708

e-ISSN

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Svazek periodika

108

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

18

Strana od-do

645-662

Kód UT WoS článku

000342415400004

EID výsledku v databázi Scopus

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