Publication details
Unusual Na,Mg enriched beryl and its breakdown products (beryl II, bazzite, bavenite) from euxenite type NYF pegmatite related to the orogenic ultrapotassic Třebíč Pluton, Czech Republic
| Authors | |
|---|---|
| Year of publication | 2010 |
| Type | Article in Periodical |
| Magazine / Source | The Canadian Mineralogist |
| MU Faculty or unit | |
| Citation | |
| Field | Geology and mineralogy |
| Keywords | Beryl bazzite bavenite electron microprobe Mössbauer spectroscopy granitic pegmatite Třebíč Pluton Czech Republic |
| Description | Intragranitic, euxenite type NYF pegmatite Kožichovice II derived from ultrapotassic orogenic Třebíč Pluton (syenogranite) contains pale green prismatic crystals of primary beryl Ienclosed in massive quartz. Beryl I is locally altered to the secondary mineral assemblage beryl II + bavenite + bazzite + smectite. Secondary mineral assemblage after beryl I including common bavenite and elevated Ca in bazzite suggest high activity of Ca in late fluids. The temperature slightly below 250 to 350 C and neutral to slightly alkaline conditions for the formation of the secondary assemblage are suggested. |
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