Perovskite-group minerals from the Rio Apa and Amambay regions, NE Paraguay

Geologia USP. Série Científica

Celso de Barros Gomes¹  Piero Comin-Chiaramonti² 

[1] Universidade de São Paulo. Instituto de Geociências. Departamento de Mineralogia e Geotectônica;University of Trieste. Department of Mathematics and Geosciences;

关键词: Perovskite;    Alkaline rocks;    Carbonatites;    Eastern Paraguay;   

DOI  :  10.11606/issn.2316-9095.v15i3-4p55-66

来源: DOAJ

【 摘 要 】

Perovskite-group minerals of alkaline-carbonatitic rocks from the Rio Apa and Amambay regions in Eastern Paraguay are members of the perovskite-lueshite-loparite-latrappite solid-solution series. Strontian-loparite is prevailing in the fenitized trachytic rocks and defines an evolutionary trend represented by an increase of Sr and LREE. The crystallization of the perovskite-group minerals resulted probably from metasomatic processes caused by fluids derived from cognate alkaline or carbonatitic sources, at relatively low temperatures (e.g. 400-700°C)

【 授权许可】

Unknown