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@proceedings{1412748, author = {Novák, Milan and Prokop, Jiří and Losos, Zdeněk and Macek, Ivo}, booktitle = {CAM-2017 (Conference on Accessory Minerals), Wien}, keywords = {tourmaline;pegmatite;contamination;Moldanubian Zone;serpentinite}, language = {eng}, title = {Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone}, year = {2017} }
TY - CONF ID - 1412748 AU - Novák, Milan - Prokop, Jiří - Losos, Zdeněk - Macek, Ivo PY - 2017 TI - Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone KW - tourmaline;pegmatite;contamination;Moldanubian Zone;serpentinite N2 - 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. ER -
NOVÁK, Milan, Jiří PROKOP, Zdeněk LOSOS a Ivo MACEK. Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone. In \textit{CAM-2017 (Conference on Accessory Minerals), Wien}. 2017.
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