Journal article

Formation of eclogite, and reaction during exhumation to mid-crustal levels, Snowbird tectonic zone, western Canadian Shield

JA Baldwin, R Powell, ML Williams, P Goncalves

JOURNAL OF METAMORPHIC GEOLOGY | BLACKWELL PUBLISHING | Published : 2007

Abstract

A re-evaluation of the P-T history of eclogite within the East Athabasca granulite terrane of the Snowbird tectonic zone, northern Saskatchewan, Canada was undertaken. Using calculated pseudosections in combination with new garnet-clinopyroxene and zircon and rutile trace element thermometry, peak metamorphic conditions are constrained to ∼16 kbar and 750 °C, followed by near-isothermal decompression to ∼10 kbar. Associated with the eclogite are two types of occurrences of sapphirine-bearing rocks preserving a rich variety of reaction textures that allow examination of the retrograde history below 10 kbar. The first occurs as a 1-2 m zone adjacent to the eclogite body with a peak assemblage ..

View full abstract

University of Melbourne Researchers