Publication details
Revize zeolitů v alpské paragenezi z historické lokality Oslavany (Česká republika)
| Title in English | Revision of zeolites in Alpine paragenesis from the historical locality Oslavany (Czech Republic) |
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| Authors | |
| Year of publication | 2014 |
| Type | Article in Periodical |
| Magazine / Source | Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze |
| MU Faculty or unit | |
| Citation | |
| Field | Geology and mineralogy |
| Keywords | zeolites; natrolite; stilbite-Ca; analcime; heulandite-K; alpine veins; amphibolite Oslavany; Czech Republic |
| Description | Zeolite mineral assemblages from historical locality of Oslavany has been recently studied. Mineralization is developed on the fissures of amphibolite from the Svratka crystalline complex in the immediate contact of the Olešnice unit, Moravosilesian Zone. The most common zeolites are natrolite along with red-brown stilbite-Ca. Analcime occurs along with prehnite as pseudomorphs after laumontite. The most interesting mineral in the association is heulandite-K, a very rare end-member of heulandite series in the world known only from a few localities. This alpine paragenesis is characterized by a high content of Ca and was formed at low temperatures. High activity of K (heulandite-K) in the early stage and high activity of Na (analcime, natrolite) in the later stage are accompanied by overall high activity of Ca during the entire process. |