Dear All I am studing change of chemical composition of different minerals in ductile-brittle zones (shear zones), (South Ural, Russia).Does anyone know of a similar studies? If you have questions send an e-mail to: [log in to unmask] Cheers, Dmitrij ################################################################ Dmitrij Voroschuk Institute of geology and geochemistry Russian Academy of Sciences Ekaterinburg, Russia ################################################################