NJG64-4-01
1984
Lawsonite and pumpellyite from the Vestgötabreen Formation in Spitsbergen
64
4
267-273

Lawsonite and pumpellyite have been found in a pre-Silurian blueschists-eclogites complex (Vestgötabreen Formation) in Oscar II Land, central-western Spitsbergen. Lawsonite is associated with glaucophane, pumpellyite, epidote and actinolite in the matrix of metabasites from the lower unit of the
Vestgotabreen Formation. In the upper unit of that formation, jadeitic pyroxenes associated with quartz, and omphacite + garnet assemblage occur respectively in metasiliceous and metabasic rocks. The Vestgötabreen Formation thus contains both lower- and higher-grade rocks of the jadeite-glaucophane type series metamorphism of Caledonian age.

0029-196X
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