Journal
JOURNAL OF THE GEOLOGICAL SOCIETY
Volume 166, Issue -, Pages 9-12Publisher
GEOLOGICAL SOC PUBL HOUSE
DOI: 10.1144/0016-76492008-078
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- Department of Science and Technology, New Delhi, Government of India
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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.
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