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Sc redistribution during post-magmatic processes in the Cinovec/Zinnwald deposit

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HREUS Sebastián VÝRAVSKÝ Jakub CEMPÍREK Jan GALIOVA M.V.

Rok publikování 2019
Druh Článek ve sborníku
Konference LIFE WITH ORE DEPOSITS ON EARTH, PROCEEDINGS OF THE 15TH SGA BIENNIAL MEETING, 2019, VOLS 1-4
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://www.dropbox.com/s/h4ytqkelp0tu7om/eVolume%204.pdf?dl=0
Klíčová slova ZINNWALD GRANITE CUPOLA; W-LI DEPOSIT; ACCESSORY MINERALS
Popis Post-magmatic processes on Li-Sn-W deposit Cinovec/Zinnwald were studied in order to assess Sc behaviour during alteration of Sc-enriched phases and other mineralogical changes. Focussing on the main rock types of the deposit, we describe several different alteration mechanisms that affect the most important carriers of scandium - zircon, columbite, woiframite, ixiolite, scheelite, zinnwaldite, and muscovite. The alterations include: 1) replacement of zinnwaldite (avg 63 ppm Sc) by muscovite (avg. 25 ppm Sc) 2) sheelitization of Sc-rich wolframite (0.58 wt% Sc2O3). The scheelite contains low Sc and is spatially associated with Sc-rich (up to 4.87 wt% Sc2O3) ixiolite. 3) Alteration of zircon possibly leading to Sc-enrichment 4) Replacement of wolframite I by Mn-dominant Sc-poor wolframite II. From above listed minerals, only wolframite and its Sc-bearing breakdown products are the most likely to have possible economic significance for Sc extraction.
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