Geochemistry and mineralogy as indicators of parental affinity for Cenozoic Bentonites: a case study from S. Croce di Magliano (southern Apennines, Italy)
- LAVIANO R
- MONGELLI, Giovanni
Publication date
January 1996
DOI Publisher
Mineralogical Society of Great Britain:41 Queens Gate, Kensington London SW7 5HR United Kingdom:011 44 2 0 75847516, EMAIL: info@minersoc.org, INTERNET: http://www.minersoc.org, Fax: 011 44 20 78238021 ISSN
0009-8558 Citation count (estimate)
6Abstract
The major and trace element contents and mineralogical composition of Cenozoic bentonites from the southern Apennines (Italy) have been determined, for the whole-rocks and the <2 ~tm size-fractions, in order to constrain parental affinities. The main mineralogical and chemical differences have been recognized in eleven samples allowing them to be grouped into two distinct subsets. The differences are based on smectite abundance, occurrence or lack of detrital clay phases, different contents of Ti, Fe, Mn, K, P, Rb, Sc, V, Cr and Ni and differences in the Eu/Eu* and Ti/AI elemental ratios. These ratios indicate an affinity for felsic volcanics for the subset showing high smectite contents. The low smectite subset shows, instead, an af...
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