| Numéro |
J. Phys. IV France
Volume 123, March 2005
|
|
|---|---|---|
| Page(s) | 71 - 74 | |
| DOI | https://doi.org/10.1051/jp4:2005123011 | |
J. Phys. IV France 123 (2005) 71-74
DOI: 10.1051/jp4:2005123011
Petrological and physico-chemical investigations on an Tunisian glauconitic deposit
L. Erraioui1, E. Srasra2, F. Zargouni3 and K. Tajeddine41 Faculté des Sciences de Kénitra, 133, Kénitra, Maroc
2 Institut National de Recherche Scientifique et Technique, 2050 Hammam-Lif, 95, Tunisie
3 Faculté des Sciences de Tunis, 1060 Belvedère, Tunis, Tunisie
4 Faculté des Sciences Semlalia, BP. S15, Marrakech, Maroc
Abstract
The glauconite bearing rocks occurring in lower Eocene deposit of
North-East of Tunisia were examined to study the composition and association
of glauconite with different minerals. The study was carried out by
petrographic investigation, X-ray powder diffraction, Scanning Microscopy
with an Energy Depressive System methods.
Green grains are a conspicuous component of the studied material. Although resembling glauconitic minerals in thin-section, electron microprobe analyses and acid treatment indicate that the green grains are formed by glauconite core and phosphate rim.
The nature of (001), (002) and (003) spacing as found in the XRD patterns obtained for purified sample suggest the presence of glauconite mica mineral. XRD identification is amply supported by results of chemical analyses. Those revel high K and Fe contents in purified sample.
© EDP Sciences 2005