English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Eastern Brazilian Pegmatite Province encompasses a region near 150,000km2 large, mainly in the Minas Gerais State. In this context, the Conselheiro Pena pegmatite district in middle Doce River basin covers part of the Conselheiro Pena and Galiléia counties. Such district is inserted in the domains of Araçuaí fold belt, developed in the eastern margin of the São Francisco craton during the Brasiliano orogenic cycle (630-490My); main regional rocks are proterozoic metasediments of the Rio Doce Group intruded by several granitic suites of Neoproterozoic to Cambrian ages. Pegmatite bodies generally display a complex zoning and diversified mineralogy, where their lithium minerals occur in two groups related to a montebrasite and triphylite primary mineralogy. Triphylite-bearing pegmatites developed secondary phosphates replacing partially/completely the triphylite-lithiophylite assemblage, comprising mainly iron and manganese phosphates, resulting in a complex mineralogical paragenesis that include sicklerite-ferrisickerite, heterosite-purpurite, frondelite-rockbrigeite, hureaulite, reddingite, barbosalite, gormanite, phosphosiderite-strengite, variscite, cyrilovite and vivianite. In relation to the montebrasite-rich pegmatites, the primary mineral occurs associated with 1 Departamento de Geologia, Escola de Minas, UFOP, Ouro Preto, Brasil; r_scholz_br@yahoo.com 2 Departamento de Geologia, Instituto de Geociências, UFMG, Belo Horizonte, Brasil; mchaves@ufmg.br 3 Universidade Federal de Itajubá, Campus Itabira, Itabira, Brasil; fbelotti2004@yahoo.com.br 4 Departamento de Engenharia de Minas, Escola de Minas, UFOP, Ouro Preto, Brasil; mauro_engminas@hotmail.com 27 262 fluorapatite, hydroxylherderite, brazilianite, beryllonite, eosphorite, siderite, greinfeinstenite, zanazziite, goyazite and crandalite. Other two types of secondary montebrasite also can be found in substitution bodies, showing lower-F content. Such pegmatite groups are mainly related to the Urucum granitic suite that composes the G2 granitic “supersuite”; they are distributed in a north-south trend around the Urucum pluton, in central portion of the district. The distribution of pegmatites of triphylite or montebrasite groups seems to be related to differentiation process, and can be used as a prospective guide for lithium minerals.

The secondary phosphate minerals from Conselheiro Pena Pegmatite District (Minas Gerais, Brazil): substitutions of triphylite and montebrasite