samples from thin sections (van tort et al., 1994), so that micromorphology and analytical transmission electron microscopy (ATEM) can be performed on the.
Clays and Clay Minerals, Vol. 47, No. 5, 637-646, 1999,
T R A N S M I S S I O N X - R A Y D I F F R A C T I O N OF U N D I S T U R B E D SOIL M I C R O F A B R I C S O B T A I N E D B Y M I C R O D R I L L I N G IN THIN S E C T I O N S L. DENAIX, 1 E VAN tORT, 2 M. PERNES,2 AND A.G. JONGMANS3 i Unit6 d'Agronomie INRA, Domaine de la Grande Ferrade, BP 81, 33883 Villenave d'Ornon Cedex, France 2 Unit6 de Science du Sol, INRA, Route de St.-Cyr, 78026 Versailles Cedex, France 3 Department of Soil Science and Geology, Agricultural University, RO. Box 37, 6700 AA Wageningen, The Netherlands Abstract--Clay mineralogical studies by X-ray diffraction performed on extracted 180 150 >100
640
Denaix, van Oort, Pernes, and Jongmans
Clays and Clay Minerals
Vol. 47, No. 5, 1999
TXRD on undisturbed microportions of soil thin sections
641
g 2800 2400 2000
-
.~1600 j 1200 800
~-o
~
400
o
_
0 tO
tO
tt) r
IO e0
t~ '~"
tO tO
tO ID
2 theta (degrees)
Figure 4. TXRD pattern in scanning mode from Morne&-Louis samples, 5-65 ~ range, (a) microsample of groundmass (-7.5 p~g) and (b)
