Remember Me
Or use your Academic/Social account:


Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Prasannakumar, V; Lloyd, GE (2007)
Publisher: Springer Verlag
Languages: English
Types: Article
Shear markers and shear sense indicators from the Bhavani shear zone (BSZ), a member of the south Indian Proterozoic shear system, separating the northern Archaean and southern Pan African granulite terranes, suggest multiphase reactivation. There is a progressive increase in mylonitisation corresponding to a progression in strain. The LS fabrics indicate near vertical principal flattening plane trending ENE-WSW, but with subvertical as well as subhorizontal stretching lineations implying a possible reactivation history with opposing movement vectors. Whilst the SEM-EBSD derived LPO of amphibole, biotite and feldspars suggest plastic deformation through the activation of intracrystalline slip systems, diffusional creep accommodated deformation can be inferred from the quartz LPO. All LPO suggest modifications in the fabric due to both retrograde and prograde reactivation during the tectono-thermal history of the BSZ over a period of nearly 2.0Ga. Petrofabric-derived seismic properties for the BSZ suggest that it exhibits a considerable seismic anisotropy, which reflects the petrofabrics of hornblende and biotite. Both LPO and seismic property observations imply conflicting tectonic X and Y directions, indicating possible superposition of contrasting X and Y vectors during different phases of the shear zone reactivation.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Adams, B.L., Wright, S.I. & Kunze, K. 1993. Orientation imaging: the emergence of a new microscopy. Metallurgical Transactions 24A, 819-831.
    • Babuska, V. and Cara, M. 1991. Seismic Anisotropy in the Earth. Kluwer Academic, Dordrecht. 217pp.
    • Bartlet, J.M., Harris, N.B.W., Hawkesworth, C.J., & Santosh, M., 1995. New isotope constraints on crustal evolution of southern India and Pan-African metamorphism. Memoir Geological Society of India, 34, 391-397.
    • Ben Ismail, W. and Mainprice, D. 1998. An olivine fabric database: an overview of upper mantle fabrics and seismic anisotropy. Tectonophysics 296, 145-158.
    • Bouchez, J.L. 1978. Preferred orientation of quartz (a)-axes in some tectonites - kinematic inferences. Tectonophysics 49, T25-T30.
    • Bouchez, J.L., Dervin, P., Mardon, J.P. and Englander, M. 1979. Neutron-diffraction applied to lattice preferred orientation study in quartzites. Bulletin de Mineralogie 102, 225-231.
    • Bunge, H.J. 1982. Texture Analysis in Materials Science. Butterworths, London, 599pp.
    • Burg, J.P. and Laurent, P. 1978. Strain analysis of a shear zone in a granodiorite. Tectonophysics 47, 15-42.
    • Burlini, L. and Kern, H. 1994. Special Issue: Seismic properties of crustal and mantle rocks - Laboratory measurements and theoretical calculations. Surveys in Geophysics 15, 439-672.
    • Christensen, N.I. 1966. Elasticity of ultrabasic rocks. Journal of Geophysical Research 71, 5921-5931.
    • Cruz., E.D., Nair, P.K.R., & Prasannakumar, V., 2000. Palghat Gap- a dextral shear zone from the south Indian granulite terrain. Gondwana Research, 3, 21-31.
    • Dollinger, G. and Blacic, J.D., 1975. Deformation mechanisms in experimentally and naturally deformed amphiboles. Earth Planet. Sci. Lett., 26, 409-416.
    • Dornbush, H.J., Weber, K. and Skrotski, W., 1994. Development of microstructure and texture in high temperature mylonites from the Ivrea zone, In: Bunge, H.J., Segesmond, S., Skrotski, W., and Weber, K.(eds) Textures of geological materials. DGM Informations, Oberusel, 187-201.
    • Drury, S.A., & Holt R.W., 1980. The tectonic framework of the south Indian craton: a reconnaissance involving Landsat imagery. Tectonophysics, 65, T1-T5.
    • Egydio-Silva, M., Vauchez, A., Bascou, J. and Hippertt, J. 2002. High-temperature deformation in the Neoproterozoic transpressional Ribeira belt, southeast Brazil. Tectonophysics 352, 203-224.
    • Friend, C.R.L. and Nutman, A.P. 1992. Response of zircon U-Pb isotopes and whole rock geochemistry to CO2 fluid-induced granulite facies metamorphism, Kabbaldurga, Karnataka, South India. Contributions to Mineralogy and Petrology 111, 299-310.
    • Grady, J.C. 1971. Deep main faults in South India. Journal Geological Society India Harris, N.B.W., Santosh, M. and Taylor, P.N. 1994. Crustal evolution in South India - constraints from Nd isotopes. Journal of Geology 102, 139-150.
    • Hill, R. 1952. The elastic behaviour of a crystalline aggregate. Proceedings of the Physical Society, London A 65, 351-354.
    • Jain, A.K., Singh, S., & Manickavasagam, R.M., 2003. Intracontinental shear zones in the southern granulite terrain: their kinematics and evolution. Memoir Geological Society of India, 50, 225-253.
    • Janardhan, A.S., Jayanada, A.M. and Shankara, M.A. 1994. Formation and tectonic evolution of granulites from the Biligiri Rangan and Niligiri Hills, S. India - geochemical and isotopic constraints. Journal Geological Society India 44, 27-40.
    • Ji, S.C. and Mainprice, D. 1988a. Sense of shear in high temperature moevemnet zones from the fabric asymmetry of plagioclase feldspars. Journal of Structural Geology 10, 73-81.
    • Ji, S.C. and Mainprice, D. 1988b. Natural deformation fabrics of plagioclase - implications for slip systems and seismic anisotropy. Tectonophysics 147, 145- 163.
    • Ji, S.C. and Mainprice, D. 1990. Recrystallisation and fabric development in plagioclase. Journal of Geology 98, 65-79.
    • Ji, S.C., Salisbury, M.H. and Hanmer, S. 1993. Petrofabric, P-wave anisotropy and seismic reflectivity of high grade tectonites. Tectonophysics 222, 195-226.
    • Katz, M.B. 1978. Tectonic evolution of Archaean granulite facies belt Sri Lanka - South India. Journal Geological Society India 19, 185-205.
    • Kern, H. and Wenk, H-R. 1985. Anisotropy in rocks and the geological significance. In: Wenk, H-R. (Ed.) Preferred orientation in deformed metals and rocks: an introduction to modern texture analysis, Academic Press, Orlando, 537-555.
    • Kruhl, J.H. 1987. Preferred lattice orientations of plagioclase from amphibolite and greenschist facies rocks near the Insubric Line (Western Alps). Tectonophysics 135, 233-242.
    • Law, R.D. 1990. Crystallographic fabrics; a selective review of their applications to research in structural geology. In, Knipe, R. J. and Rutter, E. H. (eds) , Deformation mechanisms, rheology and tectonics, Geological Society Special Publications 54, 335-352.
    • Lister, G.S., Paterson, M.S. and Hobbs, B. E. 1978. The simulation of fabric development in plastic deformation and its application to quartzite; the model. Tectonophysics 45, 107-158.
    • Lister, G.S. and Snoke, A.W., 1984. S-C mylonites. Jour. Struct. Geology. V.6, pp 617-638.
    • Lloyd, G.E. 2004. Microstructural evolution in a mylonitic quartz simple shear zone: the significant roles of dauphine twinning and misorientation. In: Alsop, G.I., Holdsworth, R.E., McCaffrey, K. and Hand, M. (eds) Transports and Flow Lloyd, G.E. and Kendall, J-M. 2005. Petrofabric derived seismic properties of a mylonitic quartz simple shear zone: implications for seismic reflection profiling. In: Harvey, P.K., Brewer, T., Pezard, P.A. and Petrov, V.A. (eds), Petrophysical Properties of Crystalline Rocks, Geological Society, London, Special Publications 240, 75-94.
    • Mainprice, D. 2003. World Wide Web Address: http://www.isteem.univmontp2.fr/TECTONOPHY/petrophysics/software/petrophysics_software.html.
    • Mainprice, D. and Humbert, M. 1994. Methods of calculating petrophysical properties from lattice preferred orientation data. Survey Geophysics 15, 575-592.
    • Mainprice, D. and Silver, P.G. 1993. Interpretation of SKS waves using samples from the subcontinental lithosphere. Physics of Earth and Planetary Interiors 78, 257- 280.
    • Mainprice, D., Popp, T., Gueguen, Y., Huenges, E., Rutter, E.H., Wenk, H-R. and Burlini, L. 2003. Physical Properties of Rocks and other Geomaterials, a Special Volume to honour Professor H. Kern. Tectonophysics 370, 1-311.
    • Mukhopadhyay, D., Kumar, P.S., Srinivasan, R., & Bhattacharya, T., 2003. Nature of Palghat-Cauvery lineament in the region south of Namakkal, Tamilnadu,: implications for terrane assembly in south Indian granulite province. Memoir Geological Society of India, 50, 279-296.
    • Naha, K., & Srinivasan, R., 1996. Nature of the Moyar and Bhavani shear zones, with a note on its implications on the tectonics of the southern Indian Precambrian shield. Proceedings of the Indian Academy of Science, 105, 173-189.
    • Nair, P.K.R., Prasannakumar, V., & Thomas Mathai., 1981. Structure of the western termination of the Bhavani lineament. Journal of the Geological Society of India, 22, 285-291.
    • Newton, R.C., & Hansen, E.C., 1986. The south India-Sri Lamka high grade terrain as a possible deep crust section. In- The nature of the lower continental crust, (Ed.) Dawson, J.B., Carswell, D.A., Hall, J., Wedepohl, K.H., Geological Society Special Publication 24, 297-307.
    • Nye, J.F. 1957. Physical properties of crystals. Clarendon press, Oxford. 322p.
    • Olsen, T.S. and Kohlstedt, D.L. 1984. Analysis of dislocations in some naturally deformed plagioclase feldspars. Physics and Chemistry of Minerals 11, 153-160.
    • Passchier, C.W., and Trouw, R.A.J., 1996. Microtectonics. Springer-Verlag, Berlin. P.289.
    • Prior, D.J., Boyle, A.P., Brenker, F., Cheadle, M.C., Day, A., Lopez, G., Potts, G.J., Reddy. S., Spiess, R., Timms, N., Trimby, P. Wheeler, J. & Zetterstrom, L. 1999. The application of electron backscatter diffraction and orientation contrast imaging in the SEM to textural problems in rocks. American Mineralogist 84, 1741-1759.
    • Ramsay, J.G. 1980. Shear zone geometry: a review. Journal of Structural Geology 2, 83-100.
    • Ramsay, J.G. & Graham, R.H. 1970. Strain variation in shear belts. Canadian Journal Rooney, T.P., Riecker, R.E. and Gavasci, A.T. 1975. Hornblende deformation features. Geology 3, 364-366.
    • Rutter, E.H., Boriani, A., Brodie, K.H. & Burlini, L. 1998. Special Issue: Structures and properties of high strain zones in rocks. Journal of Structural Geology 20, 200pp.
    • Schmid, S. M., & Casey, M., 1986. Complete fabric analysis of some commonly observed quartz c axis patterns. In Heard, H. C., Hobbs, B. E., (Eds) Mineral and rock deformation, Lab. Studies- the Patterson volume. Geophys. Monograph. 36. Am. Geophys. Union. 263-286.
    • Schmidt, N.H. & Olesen. N.Ø. 1989. Computer-aided determination of crystal-lattice orientation from electron channelling patterns in the SEM. Canadian Mineralogist 27, 15-22.
    • Schwerdtner, W.M. 1964. Preferred orientation of hornblende in a banded hornblende gneiss. American Journal of Science 262, 1212-1229.
    • Skrotzki, W. 1990. Microstructure in hornblende of a mylonitic amphibolite. In, Knipe, R. J. and Rutter, E. H. (eds) , Deformation mechanisms, rheology and tectonics, Geological Society Special Publications 54, 321-325.
    • Voigt, W. 1928. Lehrbuch der Kristallphysik: mit Ausschluss der Kristalloptik. B.G. Teubner, Leipzig. 978p.
    • Wendt, A.S., Wirth, R., Bayuk, I.O., Covey-Crump, S.J. and Lloyd, G.E. 2003. An Experimental and Numerical Study of the Microstructural Parameters Contributing to the Seismic Anisotropy of Rocks. Journal of Geophysical Research 108(B8), 2365, doi:10.1029/2002JB001915.
    • Wenk, H-R., and Christie, J.M. 1991. Comments on the interpretation of deformation textures in rocks. Journal of Structural Geology 13, 1091-1991.
    • Wenk, H-R., Bunge, H-J., Jansen, E. and Pannetier, J. 1986. Preferred orientation of plagioclase - neutron diffraction and U-stage data. Tectonophysics 126, 271-284.
    • Alexandrov et al (1974) Microcline Mbars 0.6700 0.4530 0.2650 0.0005 -0.0024 -0.0018 0.4530 1.6930 0.2040 0.0015 -0.1230 0 -0.0015 0.2650 0.2040 1.1820 -0.0017 -0.1500 0.0004 0.0005 0.0015 -0.0017 0.1430 0.0003 -0.0190 -0.0024 -0.1230 -0.1500 0.0003 0.2380 0.0007 -0.0018 -0.0015 0.0004 -0.0190 0.0007 0.3640
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article