Can lithium contents in mica be correctly calculated? Tischendorf´s proposal (Mineralogical Magazine 61/1997) 25 years after

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00578318" target="_blank" >RIV/67985831:_____/23:00578318 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/41601670:_____/23:N0000002 RIV/00216305:26310/23:PU150618

Výsledek na webu

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/abs/can-lithium-contents-in-mica-be-correctly-calculated-tischendorfs-proposal-mineralogical-magazine-611997-25-years-after/B04D143AF804191B9A73DD2BFEF8A3E6" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/abs/can-lithium-contents-in-mica-be-correctly-calculated-tischendorfs-proposal-mineralogical-magazine-611997-25-years-after/B04D143AF804191B9A73DD2BFEF8A3E6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2023.72" target="_blank" >10.1180/mgm.2023.72</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Can lithium contents in mica be correctly calculated? Tischendorf´s proposal (Mineralogical Magazine 61/1997) 25 years after

Popis výsledku v původním jazyce

Micas are the most common hosts of lithium in granitoid igneous rocks. Unfortunately, their Li contents cannot be determined by electron-probe microanalysis (EPMA) which is the most common method of mineral analysis. In an effort to avoid the use of other, technically more complex and expensive methods, several empirical schemes for the estimation of Li-contents from EPMA data have been developed. The methods proposed by Tischendorf (Mineralogical Magazine, 1997) have found the widest application. After 25 years of common usage, we have evaluated these methods by direct Li determination using laser ablation-inductively coupled plasma-mass spectrometry (LA–ICP–MS). Approximately 3000 spot analyses of Li in micas from eight areas worldwide obtained by LA–ICP–MS were compared with the values yielded by the methods of Tischendorf. We conclude that none of the lithium estimation methods can compensate fully for a real local analysis by LA–ICP–MS or secondary-ion mass spectrometry (SIMS). Generally, SiO2-based estimation for trioctahedral micas provides a better match to the analysed values than F-based estimation for dioctahedral micas. The Rb-based estimation for dioctahedral micas does not provide acceptable results. The usage of averaged Si- and F-based estimations can be accepted in common petrological studies for a general characterisation of mica species. Large errors of individual spot estimations preclude their usage in detailed mineralogical studies.

Název v anglickém jazyce

Can lithium contents in mica be correctly calculated? Tischendorf´s proposal (Mineralogical Magazine 61/1997) 25 years after

Popis výsledku anglicky

Micas are the most common hosts of lithium in granitoid igneous rocks. Unfortunately, their Li contents cannot be determined by electron-probe microanalysis (EPMA) which is the most common method of mineral analysis. In an effort to avoid the use of other, technically more complex and expensive methods, several empirical schemes for the estimation of Li-contents from EPMA data have been developed. The methods proposed by Tischendorf (Mineralogical Magazine, 1997) have found the widest application. After 25 years of common usage, we have evaluated these methods by direct Li determination using laser ablation-inductively coupled plasma-mass spectrometry (LA–ICP–MS). Approximately 3000 spot analyses of Li in micas from eight areas worldwide obtained by LA–ICP–MS were compared with the values yielded by the methods of Tischendorf. We conclude that none of the lithium estimation methods can compensate fully for a real local analysis by LA–ICP–MS or secondary-ion mass spectrometry (SIMS). Generally, SiO2-based estimation for trioctahedral micas provides a better match to the analysed values than F-based estimation for dioctahedral micas. The Rb-based estimation for dioctahedral micas does not provide acceptable results. The usage of averaged Si- and F-based estimations can be accepted in common petrological studies for a general characterisation of mica species. Large errors of individual spot estimations preclude their usage in detailed mineralogical studies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

<a href="/cs/project/GX19-29124X" target="_blank" >GX19-29124X: VÝVOJ STAVEB A GEOCHEMICKÉ SIGNATURY KARBONATITŮ V ČASE: VÝZNAM MOBILITY A KONCENTRACE KRITICKÝCH KOVŮ</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

1471-8022

Svazek periodika

87

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

878-886

Kód UT WoS článku

001106453200001

EID výsledku v databázi Scopus

2-s2.0-85172389896