NJG61-1-04
1981
Mineral relations in siliceous dolomites and related rocks in the high-grade metamorphic Precambrian of Rogaland, SW Norway
61
1
35-45

Forsterite- and diopside-bearing marbles, calc-silicate rocks, and quartz-rich rocks occur in the Precambrian granulite facies terrain of SW Norway. Most minerals in these rocks have a Mg-rich composition. Calcite-dolomite geothermometry, phase relations, and element distribution suggest a
temperature gradient from about 700°C in the northern part of the area to higher temperatures near the intrusive complexes in the south. The formation of high-variance mineral assemblages, for instance at contacts between carbonate-rich and silica-rich rocks, is attributed to metasomatic activity.

0029-196X
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