The object of this study is magnesian clay minerals present in carbonate rocks of the post-rift
phase of the pre-salt in the Santos Basin. These rocks developed in an Aptian-age alkaline�…

The characterization of Mg-clays in rock samples (well P1) from the Barra Velha Formation
(Early Cretaceous) allowed the establishment of mineral assemblages on the basis of their�…

Since the discovery of giant Aptian pre-salt reservoirs in Brazilian margin basins, the study of
lacustrine carbonates has drawn great attention from the scientific community�…

The compositional and textural characterization of authigenic Mg-clays from the Barra Velha
Formation (Early Cretaceous) samples (well P1) was performed. The Mg-clay mineral�…

The genesis of clays in Pantanal soils is influenced by parent material, water seasonality
and elevated temperatures, resulting in soils with attributes not so common in other tropical�…

Mg clay minerals are usually associated with carbonates in alkaline-saline environments,
precipitated from solution and/or transformation from other minerals. The aim of this research�…

The discovery of huge oil accumulations in the South Atlantic Pre-Salt carbonate lacustrine
deposits has attracted much exploration and research interest on these challenging�…

Marine carbonate reservoir formation evaluation is typically not concerned about the
presence of clays, provided that the deposition of good quality carbonate platform facies is�…

Abstract The Cod� Formation is an Aptian marine-influenced lacustrine depositional system
in the Parna�ba Basin (Brazil). This unit is an important sedimentary succession because of�…

Kaolin samples from the Jari deposit (Amazon region) were studied using various
techniques to characterize its structural and crystallochemical aspects, and to establish its�…