Djordje Grujic Geologisches Institut Albertstr. 23-B D-79104 Freiburg i. Br. Tel.: +49 (0)761 - 203 6499 Fax: +49 (0)761 - 203 6496 email: dgrujic@dal.ca

RESEARCH INTERESTS

• Analogue Scale Modelling Experiments

A new analogue model deformation lab, specially designed for thermomechanical modelling of crustal processes is being finished at the Geologisches Institut. The forthcoming experimental studies will be focused on two projects:
• Studies of mechanisms of verical ductile extrusion, and exhumation in continental collision zones supported by a case study in Himalayas. The extrusion processes will be studied by means of scaled analogue modelling using ductile material with temperature-sensitive viscosity.

Together with Elmar Wosnitza
• Partial melt formation and segregation in deforming rocks. In our experiments we will be deforming two- or three-phase, scaled analogue models to study the development of structures as a function of different flow laws of the matrix and the melt, and their various volume proportions.

Together with Marcus Lang
• Earlier and still ongoing work at the ETH-Zürich is on the experimental studies of superposed folding, folding parallel to stretching, relation between melt and deformation.

Together with Neil S. Mancktelow  and Thomas Walter

• Bhutan Himalaya
Regional field study of the relation between deformation, inverted metamorphism and intrusion of leucogranites in the Higher Himalayan Crystalline. Dating of deformation, magmatism and exhumation.

In collaboration with: Cameron Davidson, Lincoln S. Hollister, Keith Klepeis, Randall R. Parrish, Stefan M. Schmid, and Diane Seward.
 
 

• Central Alps
Regional field study of the geometry and kinematics of Alpine deformation in the Lower Pennine Nappes (Tessin, Switzerland)

In collaboration with Neil S. Mancktelow.
 
 

• Madagascar
Regional field study of kinematics of late Pan-African shear zones and of the "stratoid" granitoid intrusions. Correlation of large Pan-African structures on Madagascar, East Africa and Southern India, and the mechanism of break-up of Gondwana. Thermotectonic evolution of the Madagascan crust since the break-up of Gondwana.

In collaboration with: Guido Schreurs and Diane Seward.

Mapping of the "Andringitra protected zone", south Madagascar.
In collaboration with: WWF-Madagascar, and research students: Jürgen Bäuerle, Sanna Mrkwiczka.
 
 

• Petrofabric and crystallographic texture analysis
Application of quartz textures (optical and X-ray, and Neutrone time-of-flight diffraction measurements) to solve regional kinematics.

• Scanning Electron Microscopy
Application of SEM techniques to decipher various geological problems.

Tektonische Arbeitsmethoden I (Introductory Structural Geology). Winter Semester.

Tektonische Arbeitsmethoden II (Advanced Structural Geology - Tectonics). Summer Semester.

Oberseminar: "Geologische Prozesse in Kollisionszonen". Winter Semester.

EXCURSIONS

Sognefjord transect (Oslo-Bergen).

PUBLICATIONS:

Grujic, D. 1985. Analysis of Faults in Ravanica Gorge (East Serbia), Extrait des Comptes Rendus des Séances de la Société Serbe de Géologie pour l'anné 1984, 211-216.

Grujic, D. 1988. Pencil structures and rotation of décollement sheets in Sirogojno area, Annales Géologiques de la Péninsule Balkanique, 51, 287-291.

Grujic, D. 1993. The influence of initial fold geometry on Type 1 and Type 2 interference patterns, an experimental approach. J. Struct. Geol. 15, 293-307.

Grujic, D. & Mancktelow, N. S. 1995.Folds with axes parallel to the extension direction: an experimental study, J. Struct. Geol. 17, 279-291.

Gardien, V., Thompson, A.B., Grujic, D. & Ulmer, P. 1995. Experimental melting of biotite + plagioclase + quartz ± muscovite assemblages and implication for crustal melting. J.Geophys.Res. 100, 15,581-15,591.

Vasconcelos, C., McKenzie, J. A., Bernasconi, S., Grujic, D. & Tien, A.J. 1995. Microbial mediation as a possible mechanism for natural dolomite formation at low temperatures. Nature. 377, 220-222.
 

Grujic, D. & Mancktelow,N. S. 1996. Structure of the northern Maggia and Lebendun Nappes, Lepontine Alps, Switzerland, Eclogae geol. Helv. 89/1, 461-504.

Grujic, D., Casey, M., Davidson, C., Hollister, L., Kündig, R., Pavlis, T. & Schmid, S. 1996. Ductile extrusion of the Higher Himalayan Crystalline in Bhutan: evidence from quartz microfabrics, Tectonophysics.260, 21-44.

Davidson, D., Grujic, D., Hollister, L.S., Schmid, S.M. 1997. Metamorphic reactions related to decompression and synkinematic intrusion of leucogranite, High Himalayan Crystallines, Bhutan.,Journal of Metamorphic Geology. 15, 593-612.

Grujic, D. & Mancktelow, N.S.1998. Melt-bearing shear zones: analogue experiments and comparison with examples from southern Madagascar. Journal of Structural Geology,20, 673-680.

Mancktelow, N.S., Grujic, D. & Johnson, E.L. 1998. An SEM study of porosity and grain boundary microstructure in quartz mylonites, Simplon Fault Zone, Central Alps. Contribution to Mineralogy and Petrology, 131, 71-85.

Grujic, D., Schreurs, G. & Seward. D. in press. Long-time geologic stability of Andringitra massif: evidence from Apatite fission-track thermochronology.Akon'nyAla.

Photo articles:

Grujic, D. 1990. Pamir, Galaksija, 224, 34-39. Belgrade.

Grujic, D. 1991. Cappadocia, Galaksija, 225, 42-47. Belgrade.

Grujic, D. & Schreurs, G. 1996. The Quest for Sapphires, Earth,5,76-79.

Grujic, D. 1996. Bhutan - geology in Shangrila -, Himalayan Notes, 7&8, 19-23. Tempe, AZ.

Grujic, D. in press Aufstieg und Niedergang des Himalaya am Beispiel Bhutans, Die Alpen., Bern

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