Geochemistry of minerals from Li-bearing granitic aplite-pegmatite veins of Segura area (Castelo Branco, Portugal)

Li-bearing granitic aplite-pegmatite veins containing muscovite, montebrasite, natromontebrasite, lepidolite, topaz,cassiterite and manganocolumbite crop out in Segura area. Primary lepidolite contains more F, Rb and less Al than primary muscovite. Primary natromontebrasite has more Na, F and less L...

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Bibliographic Details
Main Author: Antunes, I.M.H.R. (author)
Other Authors: Neiva, A.M.R. (author), Silva, M.M.V.G. (author)
Format: conferenceObject
Language:eng
Published: 2011
Subjects:
Li-bearing
Aplite-pegmatites
Lipedolite
Montebrasite
Natromontebrasite
Cassiterite
Manganocolumbite
Online Access:http://hdl.handle.net/10400.11/763
Country:Portugal
Oai:oai:repositorio.ipcb.pt:10400.11/763
Description
Summary:Li-bearing granitic aplite-pegmatite veins containing muscovite, montebrasite, natromontebrasite, lepidolite, topaz,cassiterite and manganocolumbite crop out in Segura area. Primary lepidolite contains more F, Rb and less Al than primary muscovite. Primary natromontebrasite has more Na, F and less Li and OH than montebrasite. Cassiterite is zoned showing sequences of alternating parallel darker and lighter zones. The darker zones are strongly pleochroic, oscillatory zoned, show exsolved Manganocolumbite and have more Nb and Ta than the lighter zones. Manganocolumbite is oscillatory zoned.

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