Mineralogical and geochemical characterization of palygorskite from Gabasa (NE Spain). Evidence of a detrital precursor
- 1 March 1996
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 31 (1), 33-44
- https://doi.org/10.1180/claymin.1996.031.1.03
Abstract
A mineralogical and geochemical study of the Gabasa outcrop (Huesca, NE Spain) was undertaken. It consists of Early Oligocene marly and clayey fluvial and lacustrine (playa-lake) sediments. The phases detected were quartz, amorphous silica, calcite, dolomite, palygorskite, illite, interstratified illite-smectite, Al-smectite and Mg-smectite. The palygorskite expands with ethyleneglycol. Statistical analysis of the geochemical data shows that the rare earth elements and transition trace elements are basically associated with the detrital phyllosilicates, although a considerable amount of the latter is contained in the palygorskite (ΣREE = 60–70 ppm, Cr+Co+Ni+V+Zn+Cu = 120–150 ppm), in contrast to the normally low values for neoformed minerals. This fact, together with the significant presence of Al and Fe in the palygorskite, suggest genesis involving alteration by dissolution of the 2:1 structure of the illite and/or Al-smectite, followed by re-ordering in a fibrous structure.Keywords
This publication has 17 references indexed in Scilit:
- Evidence of a Precursor in the Neoformation of Palygorskite — New Data by Analytical Electron MicroscopyClay Minerals, 1994
- Analyses of Palygorskites and Associated Clays from the Jbel Rhassoul (Morocco): Chemical Characteristics and Origin of FormationClays and Clay Minerals, 1993
- Carbon dioxide in the atmosphere; evidence from Cenozoic and Mesozoic PaleosolsAmerican Journal of Science, 1991
- Oxygen isotopes in meteoric calcite cements as indicators of continental paleoclimateGeology, 1991
- Expandable Palygorskite from the Cretaceous-Tertiary Boundary, Mangyshlak Peninsula, U.S.S.R.Clays and Clay Minerals, 1987
- The stable isotopic composition of modern soil carbonate and its relationship to climateEarth and Planetary Science Letters, 1984
- Mineralogía de los materiales terciarios del área de Tarazona Borja-Ablitas (depresión del Ebro)Estudios Geológicos, 1984
- Control of seawater compositionNature, 1979
- Stable carbon isotope ratios and the existence of a gas phase in the evolution of carbonate ground watersGeochimica et Cosmochimica Acta, 1974
- Reaction rates and δO18 variation for the carbonate-phosphoric acid preparation methodGeochimica et Cosmochimica Acta, 1972