Mineralogical charaterization of the clays of the Santa Elena Peninsula, Ecuador

被引：0
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作者：
Morales Carrera, Ana Mercedes [1 ]
Drummond Chicarino Varajao, Anglica Fortes [2 ]
Goncalves, Marcos Andrade [3 ]
机构：
[1] Univ Fed Ouro Preto, DEGEO, Ouro Preto, Brazil
[2] Univ Fed Ouro Preto, Dept Geol, Ouro Preto, MG, Brazil
[3] Univ Fed Ouro Preto, ICEB, Ouro Preto, MG, Brazil
来源：
REM-REVISTA ESCOLA DE MINAS | 2008年 / 61卷 / 01期
关键词：
Clay; montmorillonite; bentonite; Santa Elena Peninsula; Ancon Group; Tosagua Formation;
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摘要：
The Santa Elena Peninsula, located in the southwest of the Ecuadorian coast, consists of igneous and sedimentary rocks from the Cretaceous to the Quaternary era. The sampled clays originated from the alteration of Andean volcanic ashes found inserted in the clay rocks, of the Eocene Medium to Miocene Medium (Ancon Group and, Tosagua and Progreso Formations). Mineralogical analysis (XDR, ATG and ATD), textural analysis (grain size distribution, specific surface and morphological analysis by SEM), and chemical analysis (X-ray fluorescence and CEC), have permitted the selection of four deposits that have iron-montmorillonite as their main clay mineral, in association with kaolinite and traces of mica. Clays of theses deposits have been characterized as calcic bentonites.
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页码：97 / 105
页数：9
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