Introduction
Periodicals
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
2011/19/1
Chemické složení zlata, wolframitu a scheelitu z rozsypů lokality Trucbaba - Valcha u Humpolce
Chemické složení zlata, wolframitu a scheelitu z rozsypů lokality Trucbaba - Valcha u Humpolce
Zbyněk Buřival, Zdeněk Losos, Lenka Losertová
| Pages | 88-93 |
|---|---|
| Citation | BUŘIVAL, Zbyněk, LOSOS, Zdeněk a LOSERTOVÁ, Lenka. Chemické složení zlata, wolframitu a scheelitu z rozsypů lokality Trucbaba - Valcha u Humpolce. Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2011, 19(1), 88-93. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/19-1/chemicke-slozeni-zlata-wolframitu-a-scheelitu-z-rozsypu-lokality-trucbaba-valcha-u-humpolce |
Chemical analyses of gold, wolframite and scheelite from stream sediments from locality Trucbaba - Valcha near Humpolec, Czech Republic, are presented. Three gold grains were analyzed and revealed as very pure gold with 85 - 99 % Au. Unusual porous structures of gold grains, inclusions of native bismuth and sporadic veinlets of electrum are characteristic for the locality. Common wolframite (80 - 87 % ferberite) with higher content both MgWO4 (7 - 10 %) and MnWO4 components (4 - 9 %) on this locality as a new mineral is described. In comparison with wolframites from other localities in Moldanubicum surroundings has wolframite studied high Mg/Mn ratio. Scheelite composition is very poor in Mo. Also monazite, xenotime, magnetite, ilmenite, zircon, apatite, garnet and rutile further were identified among heavy minerals.
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