Low-Temperature, Low-Pressure Metamorphism of Mn-rich Rocks in the Lienne Syncline, Venn--Stavelot Massif (Belgian Ardennes), and the Role of Carpholite

Low-grade Mn-rich metamorphic rocks of the Lienne syncline (western part of the Venn–Stavelot Massif, Belgian Ardennes) have been re-examined to evaluate the petrological significance of carpholite proper, Mn2$ Al 2 [Si 2 O 6 ](OH) 4 . Metamorphic P–T conditions of these rocks are estimated to be