The São Luís de Montes Belos vermiculite deposit, central Brazil: Hydrothermal mineralization associated with intracontinental strike slip zones

•New mineral chemistry and isotopic data for the ultramafic SLMB Suite, which hosts an important vermiculite deposit.•The SLMBS rocks were affected by hydrothermalism, but detailed studies enabled the distinction of igneous rocks.•Two types of vermiculite with relatively distinct mineral chemistry h...

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Bibliographic Details
Published in:Journal of South American earth sciences 2018-12, Vol.88, p.459-479
Main Authors: Macedo, Hammel Assunção Oliver, Della Giustina, Maria Emilia Schutesky, de Oliveira, Claudinei Gouveia, Praxedes, Igor Fernandes
Format: Article
Language:English
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Summary:•New mineral chemistry and isotopic data for the ultramafic SLMB Suite, which hosts an important vermiculite deposit.•The SLMBS rocks were affected by hydrothermalism, but detailed studies enabled the distinction of igneous rocks.•Two types of vermiculite with relatively distinct mineral chemistry have been recognized.•Vermiculite formed, mainly, by weathering, but the “vermiculization” process probably started at the hydrothermal process.•The SLMB Suite rocks emplacement may have occurred at the final kinematic stage of Brasilia Belt.
ISSN:0895-9811
1873-0647
DOI:10.1016/j.jsames.2018.08.012