Department of Geological and Environmental Sciences

KISCH, Hanan J.

Born: 1935, Amsterdam, the Netherlands.
D. w. & n.: 1962, University of Amsterdam ; Full Professor 1984; Samuel Sebba Chair in Petrology 1985.

Research Interests: Very-low-grade metamorphism and burial diagenesis : illite 'crystallinity', coalification and maturation, phyllosilicate replacement, fluid inclusion thermometry and -barometry, correlation of indicators, methods.
Development of slaty cleavage - parameters of intensity : X-ray diffraction intensities on oriented slabs, morphology of cleavage fragments, X-ray texture goniometry.
Marginal zones of orogenic belts (Scandinavian Caledonides, Western Alps).
Clay minerals, amphiboles.
Metamorphic microfabrics.

Research projects: Relationship between the morphological, X-ray diffraction, and petrographical parameters of the intensity of incipient slaty cleavage.
Field classification, phyllosilicate orientation and microfabric of the incipient stages of slaty-cleavage development in external zones of orogenic belts (currently under study: Swiss Alps, Tasman belt of eastern Australia, and Hercynides of central Europe).
UV-fluorescence spectra of pollen, spores, and algae, morphology of nannoplankton, and composition of apatite as maturation parameters in Upper-Cretaceous and Lower-Tertiary sedimentary rocks around natural combustion centers in oil shales of the northern Negev.
Investigation of the effect of sample preparation methods (grinding, acid treatment, Ca-saturation) and sample-insertion position of slabs and slides on illite-'crystallinity' values as measured by X-ray diffraction.

Abstracts of current research :
1. Relationship between degree of very-low-grade metamorphism and the development of slaty cleavage.
2. Parameters of intensity of slaty-cleavage fabrics : cleavage morphology (cleavage/bedding fissility ratio), microfabrics, bulk X-ray diffraction intensity ratios of phyllosilicate reflections on cleavage- and bedding-parallel polished slabs, and X-ray texture goniometry (reflected and transmitted modes). Comparison between these criteria of strain and slaty-cleavage intensity in the incipient stages of slaty-cleavage development of the Helvetic zone of the Swiss Alps, Tasman belt of eastern Australia, and central-European Hercynides.
X-ray diffraction intensity ratios of phyllosilicate reflections in cleavage- and bedding-parallel polished slabs and cleavage/bedding fissility ratios in Tertiary flysches of the Helvetic zone of the Swiss Alps:
For a series of Tertiary flysches, the two criteria of incipient slaty cleavage intensity criteria, (a) X-ray diffraction intensity ratios of phyllosilicate 001 reflections in cleavage- and bedding parallel slabs, and (b) cleavage/bedding fissility ratios, show a roughly linear relationship but with a wide scatter. The fits are appreciably better if populations showing different cleavage morphology (closely- vs widely-spaced cleavage; crenulation vs non-crenulation cleavage) and lithology (silt- and fine-sand size quartz content) are plotted separately. The lack of correspondence shows that the cleavage/bedding fissility ratio is not only dependent on the phyllosilicate orientation, but also on the fabric, in particular the morphology of the cleavage domains; the relationship between the two parameters can provide a useful indication of the type of incipient cleavage fabric developed. Additional use of the intersection/bedding fissility ratio i/b is likely to help in adressing the effect of lithology, particularly the effect of the initial bedding anisotropy.
3. Differences between the chemical composition of phengite/illite and chlorite in cleavage domains, microlithons, and chlorite-mica 'stacks' in slates.
4. UV-fluorescence spectra of pollen, spores and algae; morphology of nannoplankton; and composition of apatite as maturation parameters in Upper-Cretaceous and Lower-Tertiary sedimentary rocks around natural combustion hearths in the northern Negev.
5. Effect of sample-preparation methods (grinding, acid treatment, Ca-saturation) and sample-insertion position in X-ray diffractometer on illite-'crystallinity' values.

Recent publications

DURNEY, D.W. and KISCH, H.J. A field classification and intensity scale for first-generation cleavages. AGSO Journal of Australian Geology and Geophysics (Canberra) 15 (3), 257-295, 1994.
KISCH, H.J. Incipient development of slaty cleavage : XRD intensity ratios of phyllosilicate reflections in cleavage- and bedding-parallel polished slabs. In: Wu Hanquan, Tian Bai & Liu Yiqun (eds) IGCP Project 294 International Symposium Very Low Grade Metamorphism: Mechanisms and Geological Applications. Seismological Press, Beijing, pp. 19-41, 1994.
KISCH H.J. 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, 1994.
LEAKE, B.E. and 21 others 1997. Nomenclature of amphiboles: report of the subcommittee on amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names. Mineralogical Magazine 61, 295-321, 1997.

Key words: Metamorphism, very-low-grade, illite 'crystallinity', slaty cleavage, fluid inclusions, coal rank, anchimetamorphism, orogenic belts, X-ray powder diffraction, organic metamorphism.

Phone: +972-7-646 12 90
Fax: +972-7-647 29 97

E.Mail: kisch@bgumail.bgu.ac.il