Microstructural tectonometamorphic processes and the development of gneissic layering: A mechanism for metamorphic segregation

Journal of Metamorphic Geology

Volumn 18, Issue 1, 2000, Pages 41-57

  Williams, M L ^a   Melis, E A ^a   Kopf, C F ^a   Hammer, S ^b  

^a UNIVERSITY OF MASSACHUSETTS   (United States)

^b GEOLOGICAL SURVEY OF CANADA   (Canada)

Author keywords

Gneiss; Granulite; Lower crust; Metamorphic segregation

Indexed keywords

GNEISS; LOWER CRUST; METAMORPHISM; TECTONICS; TEXTURE;

CANADA;

EID: 0034058585     PISSN: 02634929     EISSN: None     Source Type: Journal    
DOI: 10.1046/j.1525-1314.2000.00235.x     Document Type: Article

References (48)

1. Berman, R. G., 1991. Thermobarometry using multi-equilibrium calculations: a new technique, with petrological applications. Canadian Mineralogist. 29, 833-855.
2. Berman, R. G., 1992. Thermobarometry with estimation of equilibration state (TWEEQU): an IBM-compatible software package. Geological Survey of Canada Open File 2534.
3. Berthé, D., Choukroune, P. & Jegouzo, P., 1979. Orthogneiss, mylonite and noncoaxial deformation of granites: the example of the South Armorican Shear Zone. Journal of Structural Geology, 1, 31-42.
4. Bowes, D. R. & Park, R. G., 1966. Metamorphic segregation banding in the Loch Kerry Bastie sheet from the Lewisian of Gairloch, Ross-shire Scotland. Journal of Petrology, 7, 306-330.
5. Davidson, A., 1984. Identification of ductile shear zones in the southwestern Grenville Province of the Canadian Shield. In: Precambrian Tectonics Illustrated (eds Kroner, A. & Greiling, R.), pp. 207-235. E. Schweitz Verlag, Stuttgart.
6. Elkins, L. T. & Grove, T. L., 1990. Ternary feldspar experiments and thermodynamic models. American Mineralogist, 75, 544-559.
7. Fuhrman, M. L. & Lindsley, D. H., 1988. Ternary-feldspar modeling and thermometry. American Mineralogist, 73, 201-215.
8. Ghiorso, M. S., 1984. Activity/composition relations in the ternary feldspars. Contributions to Mineralogy and Petrology, 87, 282-296.
9. Giret, A., Bonin, B. & Leger, J. M., 1980. Amphibole compositional trends in oversaturated and undersaturated alkaline plutonic ring-complexes. Canadian Mineralogist, 18, 481-195.
10. Goodacre, A. K., Grieve, R. A. F., Halpenny, J. F. & Sharpton, V. L., 1987. Horizontal gradient of the Bouguer gravity anomaly map of Canada. Geological Survey of Canada, Canadian Geophysical Atlas, Map 5, scale 1 : 10,000,000.
11. Green, D. H. & Ringwood, A. E., 1967. An experimental investigation of the gabbro to eclogite transformation and its petrological applications. Geochimica et Cosmochimica Acta, 31, 767-833.
12. Grove, T. L., Baker, M. B. & Kinzler, R. J., 1984. Coupled CaAl-NaSi diffusion in plagioclase feldspar: experiments and applications to cooling rate speedometry. Geochimica et Cosmochimica Acta. 48, 2113-2121.
13. Hanmer, S., 1994. Geology, East Athabasca mylonite triangle, Saskatchewan. Geological Survey of Canada Map 1859A, scale 1 : 100,000.
14. Hanmer, S. & Kopf, C., 1993. The Snowbird tectonic zone in District of Mackenzie, Northwest Territories. Geological Survey of Canada, Current Research, 93-1C, 41-52.
15. Hanmer, S. & Passchier, C. W., 1991. Shear-sense indicators: a review. Geological Survey of Canada Paper, 90-17.
16. Hanmer, S., Darrach, M. & Kopf, C., 1992. The East Athabasca mylonite zone: an Archean segment of the Snowbird tectonic zone in Northern Saskatchewan. Geological Survey of Canada, Current Research, 92-1C, 19-29.
17. Hanmer, S., Kopf, C. Parrish, R. & Williams, M., 1994. Striding-Athabasca mylonite zone: I. Complex Archean deep crustal deformation in the East Athabasca Mylonite Triangle, N. Saskatchewan. Canadian Journal of Earth Sciences, 31, 1287-1300.
18. Hanmer, S., Williams, M. & Kopf, C., 1995. Striding-Athabasca mylonile zone: implications for the Archean and Early Proterozoic tectonics of the western Canadian Shield. Canadian Journal of Earth Sciences, 32, 178-196.
19. Hoffman, P. F., 1988. United plates of America, the birth of a craton: Early Proterozoic assembly and growth of Laurentia. Annual Review of Earth and Planetary Sciences, 16, 543-603.
20. Holland, T. & Blundy, J., 1994. Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry. Contributions to Mineralogy and Petrology, 116, 433-447.
21. Holland, T. J. & Powell, R., 1998. An internally consistent thermodynamic data set for phases of petrologic interest. Journal of Metamorphic Geology, 16, 309-343.
22. Johannes, W., 1983. On the origin of layered migmatites. In: Migmatites, Melting and Metamorphism (eds Atherton, M. P. & Gribble, C. D.), pp. 326. Shiva Publishing Limited, Nantwich, Cheshire, UK.
23. Jordan, P. G., 1988. The rheology of polymineralic rocks - an approach. Geologische Rundshau, 77, 285-294.
24. Kohn, M. J. & Spear, F. S., 1990. Two new geobarometers for garnet amphibolites, with application to southeastern Vermont. American Mineralogist, 75, 89-96.
25. Kopf, C., Williams, M., Snoeyenbos, D. & Hanmer, S., 1997. Heterogeneous metamorphism and deformation in an Archean lower-crustal shear zone; the Snowbird Tectonic Zone in northern Saskatchewan, Canada. GAC/MAC Annual Meeting Abstracts, 22, A81.
26. Kretz, R., 1983. Symbols for rock-forming minerals. American Mineralogist, 68, 277-279.
27. Lucas, S. B. & St-Onge, M. R., 1995. Syn-tectonic magmatism and the development of compositional layering, Ungava Orogen (northern Quebec, Canada). Journal of Structural Geology, 17, 475-491.
28. MacKinnon, P., Fueten, F. & Robin, P.-Y. F., 1997. A fracture model for quartz ribbons in straight gneisses. Journal of Structural Geology, 19, 1-14.
29. Mader, U. K., Percival, J. A. & Berman, R. G., 1994. Thermobarometry of garnet-clinopyroxene-hornblende granulites from the Kapuskasing structural zone. Canadian Journal of Earth Sciences, 31, 1134-1145.
30. Misch, P., 1968. Plagioclase compositions and non-anatectic origin of migmatitic gneisses in northern Cascades Mountains of Washington State. Contributions to Mineralogy and Petrology, 17, 1-70.
31. Myers, J. S., 1978. Formation of banded gneisses by deformations of igneous rocks. Precambrian Research, 6, 43-64.
32. Nekvasil, H. & Burnham, C. W., 1987. The calculated individual effects of pressure and water content on phase equilibria in the granite system. In: Magmatic Processes: Physiochemical Principles (ed. Mysen, B. O.), pp. 500. Geochemical Society, Pennsylvania.
33. Passchier, C. W. & Trouw, R. A. J., 1996. Microtectonics. Springer, Berlin.
34. Powell, R. & Holland, T. J. B., 1988. An internally consistent data set with uncertainties and correlations: 3. Applications to geobarometry, worked examples and a computer program. Journal of Metamorphic Geology, 6, 173-204.
35. Ramberg, H., 1952. The Origin of Metamorphic and Metasomatic Rocks. University of Chicago Press, Chicago.
36. Robin, P.-Y. F., 1979. Theory of metamorphic segregation and related processes. Geochimica et Cosmochimica Acta, 43, 1587-1600.
37. Rudnick, R. L., Fountain, D. & M., 1995. Nature and composition of the continental crust: a lower crustal perspective. Reviews of Geophysics, 33, 267-309.
38. Simpson, C. & Wintsch, R. P., 1989. Evidence for deformation-induced K-feldspar replacement by myrmekite. Journal of Metamorphic Geology, 7, 261-275.
39. Snoeyenbos, D. R., Williams, M. L. & Hanmer, S., 1995. Archean high-pressure metamorphism in the western Canadian shield. European Journal of Mineralogy, 7, 1251-1272.
40. Spear, F. S., 1993. Metamorphic Phase Equilibria and Pressure-Temperature-Time Paths. Mineralogical Society of America.
41. Spry, A., 1969. Metamorphic Textures. Pergamon Press, Oxford.
42. Turner, F. J., 1941. The development of pseudo stratification by metamorphic differentiation in the schists of Otago, New Zealand. American Journal of Science, 239, 1-16.
43. Turner, F. J. & Verhoogen, J., 1960. Igneous and Metamorphic Geology. McGraw-Hill, New York.
44. Van der Molen, I., 1985. Interlayer material transport during layer-normal shortening. part I. The model. Tectonophysics, 115, 275-295.
45. Wen, S. & Nekvasil, H., 1994. Solvcalc: an interactive graphics program package for calculating the ternary feldspar solvus and for two-feldspar geothermometry. Computers and Geosciences, 2, 1025-1040.
46. White, S. H., 1976. The effects of strain on the microstructures, fabrics, and deformation mechanisms in quartzites. Philosophical Transactions of the Royal Society of London A, 283, 69-86.
47. Williams, M. L., Hanmer, S., Kopf, C. & Darrach, M., 1995. Syntectonic generation and segregation of tonalitic melts from amphibolite dikes in the lower crust, Striding-Athabasca mylonite zone, northern Saskatchewan. Journal of Geophysical Research, 100 (B8), 15717-15734.
48. Yardley, B. W. D., 1989. An Introduction to Metamorphic Petrology. John Wiley & Sons, New York.