Ultrafine-grained quartz mylonites from high-grade shear zones: Evidence for strong dry middle to lower crust

Geology

Volumn 34, Issue 5, 2006, Pages 369-372

  Gerald, John D Fitz ^a   Mancktelow, Neil S ^b   Pennacchioni, Giorgio ^c   Kunze, Karsten ^b  

^a AUSTRALIAN NATIONAL UNIVERSITY   (Australia)

^b GEOLOGICAL INSTITUTE   (Switzerland)

^c UNIVERSITY OF PADOVA   (Italy)

Author keywords

Electron microscopy; Lithospheric strength; Mylonite; Piezometry; Quartz

Indexed keywords

LITHOSPHERIC STRENGTH; MYLONITE; PIEZOMETRY;

CREEP; CRYSTALLOGRAPHY; DISLOCATIONS (CRYSTALS); ELECTRON MICROSCOPY; GRAIN BOUNDARIES; GRAIN SIZE AND SHAPE; PLASTIC FLOW; QUARTZ; RECRYSTALLIZATION (METALLURGY); RHEOLOGY;

METAMORPHIC ROCKS;

CRUST; MYLONITE; PREFERRED ORIENTATION; QUARTZ; RECRYSTALLIZATION; RHEOLOGY; SHEAR ZONE;

EID: 33646789141     PISSN: 00917613     EISSN: 00917613     Source Type: Journal    
DOI: 10.1130/G22099.1     Document Type: Article

References (22)

1. Adams, B.L., Wright, S.I., and Kunze, K., 1993, Orientation imaging - The emergence of a new microscopy: Metallurgical Transactions A - Physical Metallurgy and Materials Science, v. 24, p. 819-831.
2. Austrheim, H., and Boundy, T.M., 1994, Pseudotachylytes generated during seismic faulting and eclogitization of the deep crust: Science, v. 265, p. 82-83.
3. Blanchard, C.R., and Chan, K.S., 1993, Evidence of grain-boundary-sliding-induced cavitation in ceramics under compression: American Ceramic Society Journal, v. 76, p. 1651-1660, doi: 10.1111/ j.1151-2916.1993.tb06631.x.
4. Carter, N.L., 1976, Steady state flow of rocks: Reviews of Geophysics and Space Physics, v. 14, p. 301-360.
5. Christie, J.M., and Ord, A., 1980, Flow stress from microstructures of mylonites: Example and current assessment: Journal of Geophysical Research, v. 85, p. 6253-6262.
6. Dove, P.M., Han, M., and De Yoreo, J.J., 2005, Mechanisms of classical crystal growth theory explain quartz and silicate dissolution behaviour: National Academy of Sciences Proceedings, v. 102, p. 15357-15362, doi: 10.1073/pnas.0507777102.
7. Etheridge, M.A., and Wilkie, J.C., 1981, An assessment of dynamically recrystallized grain-size as a paleopiezometer in quartz-bearing mylonite zones: Tectonophysics, v. 78, p. 475-508, doi: 10.1016/ 0040-1951(81)90025-1.
8. Hirth, G., and Tullis, J., 1992, Dislocation creep regimes in quartz aggregates: Journal of Structural Geology, v. 14, p. 145-159, doi: 10.1016/0191-8141(92)90053-Y.
9. Jackson, J.A., 2002, Strength of the continental lithosphere: Time to abandon the jelly sandwich?: GSA Today, v. 12, no. 9, p. 4-10, doi: 10.1130/1052-5173(2002)012<0004: SOTCLT>2.0.CO;2.
10. Jackson, J.A., Austrheim, H., McKenzie, D., and Priestley, K., 2004, Metastability, mechanical strength, and the support of mountain belts: Geology, v. 32, p. 625-628, doi: 10.1130/G20397.1.
11. Maggi, A., Jackson, J.A., McKenzie, D., and Priestley, K., 2000, Earthquake focal depths, effective elastic thickness, and the strength of the continental lithosphere: Geology, v. 28, p. 495-498, doi: 10.1130/ 0091-7613(2000) 028<0495:EFDEET>2.3.CO;2.
12. Mancktelow, N.S., and Pennacchioni, G., 2004, The influence of grain boundary fluids on the microstructure of quartz-feldspar mylonites: Journal of Structural Geology, v. 26, p. 47-69, doi: 10.1016/ S0191-8141(03)00081-6.
13. Pennacchioni, G., and 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, v. 15, p. 777-791, doi: 10.1111/j.1525-1314.1997.00055.x.
14. Poirier, J.P., 1985, Creep of crystals: Cambridge, Cambridge University Press, 260 p.
15. Spry, A.H., 1969, Metamorphic textures: Oxford, Pergamon Press, 350 p.
16. Stipp, M.K.D., 2001, Dynamic recrystallization of quartz in fault rocks from the eastern Tonale Line (Italian Alps) [Ph.D. thesis]: Basel, Switzerland, University of Basel, 184 p.
17. Stipp, M., and Tullis, J., 2003, The recrystallized grain size piezometer for quartz: Geophysical Research Letters, v. 30, p. 2088, doi: 10.1029/2003GL018444.
18. Stipp, M., Stunitz, H., Heilbronner, R., and Schmid, S.M., 2002, The eastern Tonale fault zone: A 'natural laboratory' for crystal plastic deformation of quartz over a temperature range from 250 to 700 degrees C: Journal of Structural Geology, v. 24, p. 1861-1884, doi: 10.1016/ S0191-8141(02)00035-4.
19. Trepmann, C.A., and Stöckhert, B., 2003, Quartz microstructures developed during non-steady state plastic flow at rapidly decaying stress and strain rate: Journal of Structural Geology, v. 25, p. 2035-2051, doi: 10.1016/S0191-8141(03)00073-7.
20. Twiss, R.J., 1977, Theory and applicability of a recrystallized grain size paleopiezometer: Pure and Applied Geophysics, v. 115, p. 227-244, doi: 10.1007/BF01637105.
21. Urai, J.L., Means, W.D., and Lister, G.S., 1986, Dynamic recrystallization of minerals, in Hobbs, B.E., and Heard, H.C., eds., Mineral and rock deformation: Laboratory studies. The Paterson Volume: American Geophysical Union Geophysical Monograph 36, p. 161-199.
22. Yardley, B.W.D., and Valley, J.W, 1997, The petrologic case for a dry lower crust: Journal of Geophysical Research, v. 102, p. 12,173-12,185, doi: 10.1029/97JB00508.