Instability and localization of deformation in lower crust granulites, Minas fault zone, Nova Scotia, Canada

Geological Society Special Publication

Volumn 224, Issue , 2004, Pages 25-37

  White, Joseph C ^a  

^a UNIVERSITY OF NEW BRUNSWICK   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

CREEP; DEFORMATION; DISLOCATION; FAULT ZONE; GEOBAROMETRY; GRANULITE; LOWER CRUST; MYLONITE;

CANADA; CLARKE HEAD; NORTH AMERICA; NOVA SCOTIA;

EID: 2942511201     PISSN: 03058719     EISSN: None     Source Type: Book Series    
DOI: 10.1144/GSL.SP.2004.224.01.03     Document Type: Article

References (31)

1. AGAR, S.M. & LLOYD, G.E. 1994. Rheology of shear zones in the lower ocean crust: the role of oxide deformation. EOS Transactions of the American Geophysical Union, 75/44, 650.
2. BOULLIER, A.M. & GUEGUEN, Y. 1975. SP-mylonites: origin of some mylonites by superplastic flow. Contributions to Mineralogy and Petrology, 50, 93-104.
3. CHEN, I.W. & XUE, L.A. 1990. Development of superplastic structural ceramics. Journal of the American Ceramic Society, 73, 2585-2609.
4. DE BRESSER, J.H.P., TER HEEGE, J.H. & SPIERS, C.J. 2001. Grain size reduction by dynamic recrystallization: can it result in major rheological weakening? International Journal of Earth Sciences, 90, 28-45.
5. EDINGTON, J.W., MELTON, K.N. & CUTLER, C.P. 1976. Superplasticity. Progress in Materials Science, 21, 63-170.
6. GIBBONS, W. & MURPHY, J.B. 1995. Mylonitic mafic granulite in fault megabreccia at Clarke Head, Nova Scotia: a sample of Avalonian lower crust? Geological Magazine, 132, 81-90.
7. GIBBONS, W., DOIG, R., GORDON, T., MURPHY, B., REYNOLDS, P. & WHITE, J.C. 1996. Mylonite to megabreccia: tracking fault events within a transcurrent terrane boundary in Nova Scotia, Canada. Geology, 24, 411-414.
8. GUERMANI, A. & PENNACCHIONI, G. 1998. Brittle precursors of plastic deformation in a granite; an example from the Mont Blanc Massif (Helvetic, Western Alps). In: RUTTER, E.H., BORIANI, A., BRODIE, K.H., BURLINI, L. & TREAGUS, S.H. (eds) Structures and properties of high strain zones in rocks. Journal of Structural Geology, 20, 135-148.
9. HOBBS, B.E., MULHAUS, H.B. & ORD, A. 1990. Instability, softening and localization of deformation. In: KNIPE, R.J. & RUTTER, E.H. (eds) Deformation mechanisms, rheology and tectonics. Geological Society, London, Special Publications, 54, 143-165.
10. KEPPIE, J.D. 1982. The Minas Geofracture. In: ST. JULIEN, P. & BELAND, J. (eds) Major structural zones and faults of the Northern Appalachians. Geological Association of Canada. Special Paper, 24, 263-280.
11. KOCH, N. & MASCH, L. 1992. Formation of Alpine mylonites and pseudotachylytes at the base of the Silvretta nappe, Eastern Alps. Tectonophysics, 204, 289-306.
12. KÜSTER, M. & STÖCKHERT, B. 1999. High differential stress and sublithostatic pore fluid pressure in the ductile regime - microstructural evidence for short-term post-seismic creep in the Sesia Zone, Western Alps. Tectonophysics, 303, 263-277.
13. LIN, A. 1999. Roundness of clasts in pseudotachylytes and cataclastic rocks as an indicator of frictional melting. Journal of Structural Geology, 21, 473-478.
14. MAGLOUGHLIN, J.F. 1992. Microstructural and chemical changes associated with cataclasis and frictional melting at shallow crustal levels: the cataclasite B pseudotachylyte connection. Tectonophysics, 204, 243-260.
15. MEANS, W.D. 1981. The concept of steady-state foliation. Tectonophysics, 78, 179-199.
16. MEANS, W.D. 1995. Shear zones and rock history. Tectonophysics, 247, 157-160.
17. OLGAARD, D.L. 1990. The role of second phase in localizing deformation. In: KNIPE, R.J. & RUTTER, E.H. (eds) Deformation mechanisms, rheology and tectonics. Geological Society. London, Special Publications, 54, 175-181.
18. 3 spinel. Journal of the American Ceramic Society, 68, 522-529.
19. PASSCHIER, C.W. 1982. Pseudotachylyte and the development of ultramylonite bands in the Saint-Barthélémy massif, French Pyrenees. Journal of Structural Geology, 4, 69-79.
20. PENNACCHIONI, G. & CESARE, B. 1997. Ductile-brittle transition in pre-Alpine amphibolite facies mylonites during evolution from water-present to water-deficient conditions (Mont Mary Nappe, Italian Western Alps). Journal of Metamorphic Geology, 15, 777-791.
21. RUTTER, E.H. 1999. On the relationship between the formation of shear zones and the form of the flow law for rocks undergoing dynamic recrystallization. Tectonophysics, 303, 147-158.
22. SIBSON, R.H. 1980. Transient discontinuities in ductile shear zones. Journal of Structural Geology, 2, 165-171.
23. SPRAY, J.G. 1992. A frictional basis for the frictional melting of some rock-forming minerals. Tectonophysics, 204, 205-221.
24. TULLIS, J. & YUND, R.A. 1987. Transition from cataclastic flow to dislocation creep of feldspar: mechanisms and microstructures. Geology, 15, 606-609.
25. VISSERS, R.L.M, DRURY, M.R., NEWMAN, J. & FLIERVOET, T.F. 1997. Mylonitic deformation in upper mantle peridotites of the North Pyrenean Zone (France): implications for strength and strain localization in the lithosphere. Tectonophysics, 279, 303-325.
26. WALDRON, J.W.F., PIPER, D.J.W. & PE-PIPER, G. 1989. Deformation of the Cape Chignecto pluton, Cobequid highlands, Nova Scotia: thrusting at the Meguma-Avalon boundary. Atlantic Geology, 25, 51-62.
27. WEBSTER, T.L., MURPHY, J.B. & BARR, S.M. 1998. Anatomy of a terrane boundary: an integrated structural, geographic information system, and remote sensing study of the late Paleozoic Avalon-Meguma boundary. Canadian Journal of Earth Sciences, 35, 787-801.
28. WHITE, J.C. 1982. Quartz deformation and the recognition of recrystallization regimes in the Flinton Group conglomerates, Ontario. Canadian Journal of Earth Sciences, 19, 81-93.
29. WHITE, J.C. 1993. Melt instabilities and superplasticity during ductile shear of silicates. Proceedings of the Microscopical Society of Canada, 20, 118-119.
30. WHITE, J.C. 1996. Transient discontinuities revisited: pseudotachylyte, plastic instability and the influence of low pore fluid pressures on deformation mechanisms in the mid-crust. Journal of Structural Geology, 18, 1471-1486.
31. WHITE, J.C. & MAWER, C.K. 1992. Deep-crustal deformation textures along megathrusts from New-foundland and Ontario: implications for microstructural preservation, strain rates and strength of the lithosphere. Canadian Journal of Earth Sciences, 29, 129-141.