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Geology and geochemistry of paleoproterozoic magnesite deposits (-1.8Ga), State...

Parente, Clóvis Vaz; Ronchi, Luis Henrique; Sial, Alcides Nóbrega; Guillou, Jean Jacques; Arthaud, Michel Henri; Fuzikawa, Kazuo

Five important magnesite mines and small occurrences in the state of Ceara form a sequence of lenses that extend, discontinuously, for over 140km. The magnesite rocks are hosted by metadolomites with lutecite, sulphate nodules pseudomorphosed by fiber-radiated quartz, scapolite and dissolution breccias. This metacarbonate sequence is more voluminous and more calcic in the southwestern extremity ofthe belt, but ...

Date: 2022   |   Origin: Oasisbr
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