NOVÁK, Milan, Jiří PROKOP, Zdeněk LOSOS and Ivo MACEK. Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone. In CAM-2017 (Conference on Accessory Minerals), Wien. 2017.
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Basic information
Original name Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone
Authors NOVÁK, Milan (203 Czech Republic, belonging to the institution), Jiří PROKOP (203 Czech Republic, belonging to the institution), Zdeněk LOSOS (203 Czech Republic, guarantor, belonging to the institution) and Ivo MACEK (203 Czech Republic, belonging to the institution).
Edition CAM-2017 (Conference on Accessory Minerals), Wien, 2017.
Other information
Original language English
Type of outcome Conference abstract
Field of Study 10504 Mineralogy
Country of publisher Austria
Confidentiality degree is not subject to a state or trade secret
RIV identification code RIV/00216224:14310/17:00095606
Organization unit Faculty of Science
Keywords in English tourmaline;pegmatite;contamination;Moldanubian Zone;serpentinite
Tags International impact, Reviewed
Changed by Changed by: doc. RNDr. Zdeněk Losos, CSc., učo 2470. Changed: 28/3/2018 12:55.
Abstract
Dominant primary solidus and minor subsolidus tourmalines from a variety of granitic pegmatites enclosed in serpentinites of the Moldanubian Zone, Czech Republic were examined, mainly by electron probe micro-analyser, to reveal the degree of external Mg(Ca)-contamination from their host rocks. The rocks include: (i) homogeneous to slightly hetero- geneous nests of plagioclase-tourmaline rocks (group A) of anatectic or metasomatic origin, (ii) subhomogeneous to simply zoned barren pegmatite dikes (group B), and (iii) Li-bear- ing zoned pegmatite dikes of rare-element class (group C). The plagioclase-tourmaline rocks (group A) show spatial relation to pegmatites of the group B. Mostly black primary tourmalines (dravite, oxy-dravite, uvite, schorl, oxy-schorl, fluor-schorl) show extensive Mg- and Ca-contamination (group A), moder- ate Mg- and locally minor Ca-contamination (group B plus the locality Věžná I of the group C) and weak Mg-contamination of the tourmaline solely from outermost pegmatite units (group C); tourmalines from internal units of the pegmatites are typically Mg-free.
Links
GA14-13347S, research and development projectName: Variabilita lehkých prvků (Li, Be, B) ve vybraných horninotvorných a akcesorických minerálech z felsických magmatických a metamorfovaných hornin
Investor: Czech Science Foundation
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