Dear Scott,
I have been using a rather similar X-ray diffraction approach for the
determination of preferred crystallographic orientation of minerals/fabric
in polished rocks slabs : X-ray reflection-intensity ratios of
phyllosilicate reflections on slabs cut in different directions (bedding
and cleavage) as indicators of fabric.
References are :
# H.J. Kisch 1994. XRD intensity ratios of phyllosilicate reflections
in cleavage- and bedding-parallel polished slabs : incipient development of
slaty cleavage in the Caledonides of Jämtland, western central Sweden.
Revista Geológica de Chile 21 (2), 253-267.
# H.J. Kisch 1998. Criteria for incipient slaty and crenulation
cleavage development in Tertiary flysch of the Helvetic zone of the Swiss
Alps. J. structural Geol. 20 (5), 601-615.
# G. Jacob, H.J. Kisch & B.A. van der Pluijm 2000. The relationship of
phyllosilicate orientation, X-ray diffraction intensity ratios, and c/b
fissility ratios in metasedimentary rocks of the Helvetic zone of the Swiss
Alps and the Caledonides of Jämtland, central western Sweden. J.
structural Geol., 22 (2), pp. 245-258.
A paper reporting pon a somewhat similar approach to the detection and
approximate determination of calcite fabrics (which, in the rocks
considered, are much weaker than the phyllosilicate fabrics) has been
submitted and is currently under review. Calcite and quartz should be
rather similar in this regard.
I am continuing work on this, and would be happy to cooperate.
Cheers
Hanan K.
At 17:15 4/5/00, Scott Johnson wrote:
>Hi All,
>
>Our Department has a new Scintag X2 Advanced Diffraction System XRD with a
>half circle attachment. Has anyone found XRDs like this to be useful for
>determining crystallographic preferred orientation in deformed rocks? My
>inherent dislike of universal stage work has kept me out of this arena for a
>long time, but it seems like the pole figures generated by XRD might be
>useful. I would be grateful for any references that might deal with this.
>
>Cheers - Scott
>
>*************************************************************************
>Scott E. Johnson
>Department of Geological Sciences
>5790 Bryand Global Sciences Center
>University of Maine
>Orono, ME 04469-5790
>USA
>email: [log in to unmask]
>phone: (207) 581-2142
>Fax: (207) 581 2202
>http://www.geology.um.maine.edu/user/scott_johnson/HM.html
>*************************************************************************
Prof. Hanan J. Kisch
Department of Geological and Environmental Sciences
Ben-Gurion University of the Negev
P.O.B. 653, Beer-Sheva 84105, Israel
Tel.: +972-7-646 1290; Fax: +972-7-647 2997
E-mail: [log in to unmask]
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