ISSN 0016-7649 Geology of the Snap Lake kimberlite intrusion, Northwest Territories, Canada: field observations and their interpretationT. M. Gernon, M. Field, and R. S. J. Sparks1-16 Giant quartz vein formation and high-elevation meteoric fluid infiltration into the South Armorican Shear Zone: geological, fluid inclusion and stable isotope evidenceJérémie Lemarchand, Philippe Boulvais, Martin G..