Our aim in this work is (1) to characterize mineralogically and geochemically the brown amphibole and other minerals filling millimetric veins in the Cóbdar metabasalts of the Betic ophiolites in southern Spain, and (2) to deduce their genetic conditions, mainly with the aid of the optical microscopy and analytical electron-microprobe analysis, complemented by transmission and analytical electr...

The research of organoclays has been occurring for many years to develop and add value these inorganic materials several industrial applications, such as pollutant absorbers or impermeable plastics. organoclay applications are intrinsically related organo-modification the structure clays. This study shows preparation characterization produced by a nontronite type clay (calcic bentonite) from To...

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Brownfield areas are important targets of exploration; however, the extensive drilling present in these has not fully exploited their prospective potential. The appropriate use drill hole cores can play an role deep exploration. We a case study iron oxide-copper-gold (IOCG) Furnas Southeast deposit, located Carajás Mineral Province, Brazil. This deposit disseminated chalcopyrite, bornite and go...

This work presents a considerable volume of new and compiled data indicating that arc magmatism in the western paleomargin Gondwana began Carboniferous continued during Permian Early Triassic. Subsequently, reactivated Middle Jurassic due to subduction Farallon Plate under continental paleomargin. The pluton belts are distributed from edge toward interior continent same orientation as slab (wes...

In arid and semi-arid climates, soil development is strongly influenced by seasonal patterns biogenic activity, often results in pervasive pedogenic horizons consisting of highly concentrated carbonate. Brazil, such enriched calcium carbonate are common relatively well-studied paleosols the Upper Cretaceous Marília Formation. However, detailed analyses on sequence mineral precipitation phases r...