What is it about?
Blueschists and greenschists are characterized by specific minerals that are responsible for the characteristic colour of the rocks. These minerals are typically associated with specific metamorphic pressure-temperature conditions under which they crystallized. Here we show that interlayering of blueschists and greenschists that have experienced the same metamorphic history is induced by chemical variability in the rocks. Infiltration of fluids and associated element mobilization are key factors in causing the distinct visual appearance.
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This page is a summary of: Retrograde metasomatic effects on phase assemblages in an interlayered blueschist–greenschist sequence (Coastal Cordillera, Chile), Lithos, February 2015, Elsevier,
DOI: 10.1016/j.lithos.2014.12.004.
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