Garnet plasticity in the lower continental crust: Implications for deformation mechanisms based on microstructures and SEM-electron channeling pattern analysis

Journal of Structural Geology

Volumn 22, Issue 6, 2000, Pages 795-809

  Kleinschrodt, R ^a   Mcgrew, A ^b  

^a UNIVERSITY OF COLOGNE   (Germany)

^b UNIVERSITY OF DAYTON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON CHANNELING PATTERN ANALYSIS;

ANNEALING; CRYSTAL MICROSTRUCTURE; CRYSTAL ORIENTATION; DISLOCATIONS (CRYSTALS); GARNETS; GRAIN SIZE AND SHAPE; PLASTICITY; SCANNING ELECTRON MICROSCOPY; STRUCTURAL GEOLOGY;

QUARTZ;

CONTINENTAL CRUST; DEFORMATION MECHANISM; GARNET; LOWER CRUST;

SRI LANKA;

EID: 0034023409     PISSN: 01918141     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0191-8141(00)00010-9     Document Type: Article

References (34)

1. Blackburn W.H., Dennen W.H. Flattened garnets in strongly foliated gneisses from the Grenville Series of the Gananoque area, Ontario. American Mineralogist. 53:1968;1386-1393.
2. Dalziel I.W., Bailey S.W. Deformed garnets in a mylonitic rock from the Grenville front and their tectonic significance. American Journal of Science. 266:1968;542-562.
3. den Brok B., Kruhl J. Ductility of garnet as an indicator of extremely high temperature deformation: Discussion. Journal of Structural Geology. 18:1996;1369-1373.
4. Freeman B., Lisle R.J. The relationship between tectonic strain and the three-dimensional shape fabric of pebbles in deformed conglomerates. Journal of the Geological Society of London. 144:1987;635-639.
5. Gleason G.C., Tullis J. A flow law for dislocation creep of quartz aggregates determined with the molten salt cell. Tectonophysics. 247:1995;1-23.
6. Gregg W. The production of tabular grain shapes in metamorphic rocks. Tectonophysics. 49:1978;T19-T24.
7. Hölzl S., Hofmann A.W., Todt W., Köhler H. U-Pb geochronology of the Sri Lankan basement. Precambrian Research. 66:1994;123-149.
8. Ji S., Martignole J. Ductility of garnet as an indicator of extremely high temperature deformation. Journal of Structural Geology. 16:1994;985-996.
9. Ji S., Martignole J. Ductility of garnet as an indicator of extremely high temperature deformation: Reply. Journal of Structural Geology. 18:1996;1375-1379.
10. Karato S., Wang Z., Liu B., Fujino K. Plastic deformation of garnets: systematics and implications for the rheology of the mantle transition zone. Earth and Planetary Science Letters. 130:1995;13-30.
11. Kleinschrodt R. Large scale thrusting in the lower crustal basement of Sri Lanka. Precambrian Research. 66:1994;39-57.
12. Kleinschrodt R. Strain localization and large scale block rotation in the lower continental crust, Kataragama area. Sri Lanka. Terra Nova. 8:1996;236-244.
13. Kleinschrodt R. Plastical deformation of garnet under crustal conditions. European Journal of Mineralogy. 8:1996;143.
14. Kleinschrodt R., McGrew A.J. Garnet plasticity in the lower continental crust: Constraints on deformation mechanisms from microstructural and textural data. Joural of the Czech Geological Society, C. 40:(3):1995;104.
15. Kleinschrodt R., Voll G. Deformation and metamorphic evolution of a large-scale fold in the lower crust: the Dumbara synform, Sri Lanka. Journal of Structural Geology. 16:1994;1495-1507.
16. Kleinschrodt R., Voll G., Kehelpannala W. A layered basic intrusion, deformed and metamorphosed in granulite facies of the Sri Lanka basement. Geologische Rundschau. 80:1991;779-800.
17. Kröner A., Cooray P.G., Vitanage P.W. Lithotectonic subdivision of the Precambrian basement of Sri Lanka. Kröner A. The Crystalline Crust of Sri Lanka, Part I. Geological Survey Department Professional Paper. 5:1991;5-21.
18. Lister G.S. The effect of the basal-prism mechanism switch on fabric development during plastic deformation of quartzite. Journal of Structural Geology. 3:1981;67-76.
19. Lister G.S. Fabric transitions in plastically deformed quartzites: competition between basal, prism and rhomb systems. Bulletine de Mineralogie. 102:1979;232-241.
20. Lloyd G.E. Atomic number and crystallographic contrast images with the SEM: A review of backscattered techniques. Mineralogical Magazine. 51:1987;3-19.
21. Lloyd G.E. An appreciation of the SEM electron channeling technique for petrofabric and microstructural analysis of geological material. Bunge H.J., Siegesmund S., Skrotzki W., Weber K. Textures of Geological Materials. 1994;109-126 DGM-Informationsgesellschaft, Germany.
22. Mons W., Paulitsch P. Garnet orientations in different metamorphic facies. Paulitsch P. Experimental and natural rock deformation. 1969;100-108 Springer.
23. Prior D.J., Trimby P.W., Weber U.D., Dingely D.J. Orientation contrast imaging of microstructures in rocks using forescatter detectors in the scanning electron microscope. Mineralogical Magazine. 60:1996;859-869.
24. Prior D.J., Boyle A.P., Brenker F.E., Harte B., Speiss R., Weber U., Wheeler J. The hidden life of garnet. EOS Transactions, American Geophysical Union spring meeting supplement. 79:(17):1998;S356.
25. Pryer L.L., Lloyd G.E., Robin P.Y.F. An SEM electron-channeling study of flame perthite from the Killarney Granite, Southwestern Grenville Front, Ontario. The Canadian Mineralogist. 33:1995;333-347.
26. Ross J.V. Mylonitic rocks and flattened garnets in the southern Okanagan of British Columbia. Canadian Journal of Earth Science. 10:1973;1-17.
27. Schmidt N.-H., Olesen N. Computer-aided determination of crystal-lattice orientation from electron-channeling patterns in the SEM. Canadian. Mineralogist. 27:1989;15-22.
28. Schumacher R., Schenk V., Raase P., Vitanage P.W. Granulite facies metamorphism of metabasic and intermediate rocks in the Highland Series of Sri Lanka. Ashworth J.R., Brown M. High-Grade Metamorphism and Crustal Anatexis. 1990;235-271 Allen and Unwin.
29. Schumacher R., Faulhaber S. Summary and discussion of P-T estimates from garnet-pyroxene-plagioclase-quartz-bearing granulite-facies rocks from Sri Lanka. Precambrian Research. 66:1994;295-308.
30. Shelton G.L., Tullis J. Experimental flow laws of crustal rocks. EOS. Transactions of the American Geophysical Union. 62:1981;396.
31. Voegele V., Ando J.I., Cordier P., Liebermann R.C. Plastic deformation of silicate garnet I. High-pressure experiments. Physics of the Earth and Planetary Interiors. 108:1998;305-318.
32. Voll G., Evangelakakis C., Kroll H. Revised two-feldspar geothermometry applied to Sri Lankan feldspars. Precambrian Research. 66:1994;351-378.
33. Wang Z., Ji S. Deformation of silicate garnets: Brittle ductile transition and its geological implications. The Canadian Mineralogist. 37:1999;525-541.
34. Weber, U.D., 1997. Mikrostrukturen und Texturen in natürlich deformiertem Eklogit: Entwicklung und Anwendung neuer Techniken mit dem Rasterelektronenmikroskop. Diploma Thesis, University of Giessen.