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Fibrous clay minerals as lithostratigraphic markers in a Cenozoic continental basin (Sado Basin, Portugal).
- Source :
-
Applied Clay Science . Jan2016 Part 2, Vol. 119, p441-448. 8p. - Publication Year :
- 2016
-
Abstract
- The Sado Basin is located in the southwestern part of the Iberian Massif. In order to improve the lithostratigraphic and palaeoenvironmental knowledge of this Cenozoic basin, mineralogical and geochemical profiles were assessed on three lithostratigraphic units: Ervidel and Vale do Guizo (Eocene) formations and Esbarrondadoiro (Miocene) Formation. Samples representative of the most exposed outcrops of these units were collected and analyzed by XRD, XRF and SEM–EDAX. Mineralogical and chemical results were analyzed statistically using PERMANOVA, principal components analysis and factor analysis. SEM–EDAX was used to calculate the chemical formula of palygorskite. Clay mineral associations were used as stratigraphic markers as well as for palaeoenvironmental reconstructions and diagenetic analyses. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01691317
- Volume :
- 119
- Database :
- Academic Search Index
- Journal :
- Applied Clay Science
- Publication Type :
- Academic Journal
- Accession number :
- 111302089
- Full Text :
- https://doi.org/10.1016/j.clay.2015.11.006