No abstract

No abstract

Anisotropy of magnetic susceptibility (AMS) analyses were carried out on mylonitic quartzites from the footwall of the Main Central Thrust Zone, Garhwal Higher Himalaya, India. A systematic increase in degree of magnetic anisotropy ( P ′) with distance from the Main Central Thrust is documented, even in a saturated finite-strain zone. On the basis of correlation between orientation of principal AMS axes and multidomain magnetite and the mylonitic foliation and lineation direction, strain-related recrystallization was inferred to be the cause of development of the magnetic fabric. Based on these results, it is concluded that if P ′ is not controlled by K m , then the former can be used as a strain-intensity gauge. Supplementary material: Three-dimensional finite-strain parameters and rock-magnetic and AMS datasets are available at http://www.geolsoc.org.uk/SUP18328 .

DOI = 10.3126/hjs.v5i7.1341 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.164