Computes the M-index from a discrete number of orientations (Skemer et al., 2005). The M-index is derived from the difference between uncorrelated and uniform misorientation angle distributions
Reference Skemer, P., Katayama, I., Jiang, Z. & Karato, S.-I. (2005) The misorientation index: development of a new method for calculating the strength of lattice preferred orientation. Tectonophysics, 411, 157-167.
Recommended read: Schaeben, H., (2007) Comment on “The misorientation index: Development of a new method for calculating the strength of lattice-preferred orientation” by Philip Skemer, Ikuo Katayama, Zhenting Jiang, Shun-ichiro Karato. Tectonophysics 441, 115–117.
Reference for the computational method using MTEX Mainprice, D., Bachmann, F., Hielscher, R., Schaeben, H. (2014) Descriptive tools for the analysis of texture projects with large datasets using MTEX: strength, symmetry and components. In: Faulkner, D. R., Mariani, E. & Mecklenburgh, J. (eds) Rock Deformation from Field, Experiments and Theory: A Volume in Honour of Ernie Rutter. Geological Society, London, Special Publications, 409, http://dx.doi.org/10.1144/SP409.8
Syntax
m = calcMIndex(ori,varargin)Input
| ori | orientation |
Output
| M | index |