Dear all,

in Caen (France) the Daniel Chateigner's group (http://www.ecole.ensicaen.fr/~chateign/danielc/ 
) is also very active in studying rocks and other materials.
We did some works on rocks Quantitative Texture Analysis comparing X- 
ray and Neutron data and large scale geodynamics:

- Camana, G., Chateigner, D., Zucali, M., and Artioli, G. 2002. The  
grid-work texture of authigenic microcrystalline quartz in siliceous  
crust-type (SCT) mineralized horizons. American Mineralogist 87,  
1128-1138.
- Zucali, M., Chateigner, D., Dugnani, M., Lutterotti, L., and  
Ouladdiaf, B. 2002 Quantitative texture analysis of naturally deformed  
hornblendite under eclogite facies conditions (Sesia-Lanzo Zone,  
Western Alps): comparison between x-ray and neutron diffraction  
analysis. In Deformation Mechanisms, Rheology and Tectonics: Current  
Status and Future perspectives. 200, S. De Meer, M. R. Drury, J. H. P.  
De Bresser, and G. M. Pennock,Eds 239-253.
- Zucali, M., Barberini, V., Chateigner, D., Ouladdiaf, B., and  
Lutterotti, L. 2010 Brittle plus plastic deformation of gypsum  
aggregates experimentally deformed in torsion to high strains:  
quantitative microstructural and texture analysis from optical and  
diffraction data. In From: SPALLA, M. I., MAROTTA, A. M. & GOSSO, G.  
(eds) Advances in Interpretation of Geological Processes: Refinement  
of Multi-scale Data and Integration in Numerical Modelling. Geological  
Society, London, Special Publications, 332, 	
- Spalla, Gosso, Marotta, Zucali, Salvi, in press. Analysis of natural  
tectonic systems coupled with numerical modeling in the polycyclic  
continental lithosphere of the Alps. International Geology Review.  
Special Volume "Eastern Mediterranean Geodynamics".

I may provide you pdfs.

Ciao
Michele

On 17 Apr 2010, at 20:09, Sam Haines wrote:

Dear Sebastian,


X-ray texture goniometry (XTG) is used primarily for the  
quantification of
fabric intensity in clay-rich rocks, as it provides information for the
orientation of large numbers of very small particles in three  
dimensions. As
clay minerals are too small to measure conveniently by optical or EBSD  
methods,
measuring the relative intensity of a single clay XRD peak, while  
continuously
changing the orientation of the sample relative to the beam provides
information both about the orientation of clays within a sample, and the
intensity of that orientation. The technique is normally used to look at
structural problems in clay-rich rocks such as the relative roles of  
grain
rotation and new clay growth during diagenesis in sedimentary basins,  
the
mechanisms involved in the shale-slate transition, and clay fabric  
orientation
and intensity in clay-rich fault gouges and experimentally-sheared  
materials.

Haines et al., (2009), JGR B vol. 114,  doi:10.1029/2008JB005866 has a  
summary
of the technique and some it's applications to clay-rich rocks,  
primarily fault
gouges. van der Pluijm et al., (1994) J. Struct. Geol. vol.16, pp.   
1029-1032
gives details of the analytical technique and discusses sample  
preparation. Let
me know if you would like .pdf's. The 2ed edition of Passchier and  
Trouw's
Micro-tectonics (2005) also contains a useful summary somewhere in  
Chapter 10.

Although very useful, the technique is unfortunately not widely used,  
owing to
the fact that XTG machines are usually 'home-modified' XRD units,  
rather than
'off-the-shelf' purchased machines. Ben van der Pluijm at Michigan has  
one, so
does Hans Wenk at UCLA, and Manuel Sintubin at Leuven in Belgium has  
one.
Workers interested in using the technique usually collaborate with one  
of these
labs, with the Michigan lab the most active in the last few years. Are  
list
members aware of any other XTG units?

Best,


Sam
---------------------------------------------
Sam Haines
Post-Doctoral Fellow
Department of Geosciences
Pennsylvania State University
510 Deike Bldg.
University Park, PA, 16802
USA/EE UU

+1-814 865-1527 (Office phone)
+1-814 863-7823 (Office fax)
+1-734-646-0512 (Mobile)

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Hoc tu mane bibas iterum, et fuerit medicina


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Via Mangiagalli 34 - I 20133 - Milano (Italy)
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