#2 Closer to an origin of Norwegian Eclogites


There remains much controversy amongst geologists studying the origins of eclogites in Norway. Once the focus of much study in the 60s right through to the mid 90s, much is understood about their metamorphic history in terms of pressure and temperature. However, there remains no clear consensus on the nature of their protoliths and the implications this may have for their entrainment in the country rocks. Recent explorations of their REE geochemistry by myself at the NERC ICP-MS facility have revealed that most have volcanic arc affinities, with a significant minority having N-MORB affinities. For now, it seems like the basalts were created in an oceanic arc with a back-arc spreading ridge. Investigations to prove this are currently underway, but so far it seems likely.

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