Publication details
Pb-bohatý turmalín v pegmatitu z Minh Tien, Vietnam
| Title in English | Pb-dominant tourmaline in pegmatite from Minh Tien, Vietnam |
|---|---|
| Authors | |
| Year of publication | 2019 |
| Type | Article in Proceedings |
| Conference | Študentská vedecká konferencia PriF UK 2019 : Zborník recenzovaných príspevkov |
| Citation | |
| web | https://fns.uniba.sk/fileadmin/prif/svk/zborniky/Zbornik2019.pdf |
| Keywords | Minh Tien, tourmaline, Pb-dominant tourmaline, fluor -liddicoatite, fluor-elbaite |
| Description | Tourmaline samples from Minh Tien in North Vietnam were studied using advanced analytical methods such as optical microscopy and electron microprobe. The samples come from a granitic pegmatite, where tourmaline occurs associated with amazonite K-feldspar. This tourmaline is specific as it contains high amounts of Ca and Pb in its structure. The chemical analyses of various coloured tourmaline showed occurrence of fluor-liddicoatite, and fluor-elbaite, and rarely also a new Pb-dominant mineral of tourmaline group. Tourmaline occurs in four generations.The lead enrichment is obviously related to alteration of amazonite. Textural relations show that the primary Pb-rich tourmaline forms contemporarily with lepidolite during metasomatism albitization of K-feldspar and others three generations forms during hydrothermal reaction Li,B,F-rich fluid with primary tourmaline, K-feldspar and albite. |