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Tourmalinization of Bt-Bearing Metasedimentary Rocks, Zanskar, NW India



Roberto Weinberg and Pavlina Hasalova
Monash University, Australia



Copyright 2004-2011 by Roberto Weinberg. All rights reserved. Unlimited permission to copy or use is hereby granted for non-profit driven enterprise, subject to inclusion of this copyright notice and acknowledgment of the source URL:


I would very much appreciate an email stating how this material will be used: Roberto Weinberg, Monash University, Australia. Thanks, RW.


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Between Darcha and Lakhang there is an extensive body of Bt-bearing metasedimentary rocks, comprising pelites, psammites and quartzites. In two places we have found extensive blocks recording the process of tourmalinization, where Tml is associated with quartz and sulfides.




tourmalinization tourmalinization
a) Massive tourmaline surrounding a quartz vein into biotite-rich psammite. b) Same as (a) but notice the fracturing pattern of the tour.
tourmalinization tourmalinization
c) Tourmalinization front. d) Same. Notice the ferruginours alteration surrounding the alteration front interpreted to indicate the presence of sulfides.
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e) Tourmalinization front along cracks. Note triangular shape indicative of diffusion from the crack into surrounding rocks. f) Same.