GS 649: Tectonics and Mechanism of Mobile Belts

Syllabus​

Definition and mechanism of the Mobile Belt. Distinction between Precambrian & Phanerozoic Mobile Belts. Different tectonic settings of the mobile belts and its relation to mineralisation, Compressional tectonics (Thrust)- Thrust tectonics associated with shortening and thickening of the crust or lithosphere;  fold belts, fold thrust belts, transpression zones, foreland basins, thin skinned tectonics and thick skinned tectonics. Extension tectonics- Extension tectonics associated with the stretching and thinning of the crust or lithosphere as in rift, basin and transtensional sites. Strike slip Tectonics- Strike–slip tectonics associated with the relative lateral movement as a parts of the crust or lithosphere. Salt Tectonics. Tectonic indicator for Transform faults, transfer faults. Mechanism of brittle and ductile shear zones, mylonites and pseudotachylites. Plutonic emplacement, Syngenetic, synkinematic and postkinematicmineralisation; Neotectonics –Exhumation, geomorphic expression of neotectonics, active faults, seismotectonics, Seismicity associated with fault system, nature and scale of seismicity. Tectonophysics – macro and micro scale deformation, Mechanism of particle flow in mobile belts and its effects on surface structure, active and passive movements, crystal plastic deformation, grain size as indicator of stress and strain in the rock.

Texts/References

  • Fossen, H. (2012). Structural Geology. Cambridge University Press. 463
  • Twiss , R. J. and Moores, E. M. (2007). Structural Geology.  W. H. Freeman and Company, New York, 736 P.
  • Schumm, S. A., Dumont, J. F. and Holbrook, J. M. (2002) Active Tectonics and Alluvial River,  Cambridge University Press, 276 P
  • Ramsay, J. G. and Lisle, R. (2000). The techniques of modern structural geology, v. 3. Application of continuum Mechanics in Structural Geology. Academic press. London.856 p.
  • Ramsay, J. G. and Huber, M. I. (1987). The techniques of modern structural geology,  volume 2. Folds and fractures. Academic press. London. 686 p.
  • Ramsay, J. G. and Huber, M. I. (1983). The techniques of modern structural geology,  volume 1. Strain analysis. Academic press. London. 296 p.
  • Pluijm, B.A.van der and  Marshak, S. (2004) Earth Structure- An Introduction to Structural Geology and Tectonics.  WW Norton& Company. Second Edition.450 p
  • Keller, E. A. (2001) Active Tectonics: Earth, Uplift, and landscape.   Prentice Hall, Second Edition, 250 P