Actinolite-Phengite-Chlorite Metasomatites from the Toranica Pb-Zn Ore Deposit in Macedonia

In this investigation we focused on the contact metamorphic-metasomatic products in the Toranica Pb-Zn ore deposit. In the regionally metamorphed parts of the deposit we detected sericite-chlorite sub-facies, in the frame of the greenschist facies with its very common parageneses: chlorite+K-feldspar, chlorite+epidote+actinolite and chlorite+quartz. The presence of phengite indicated that the metamorphic-metasomatic processes took place under a pressure of about 5 kilobars and at a depth of 18 - 19 km. The absence of wollastonite, diopside, hedenbergite and hornblende suggested a low-temperature, < 420 ºC, character for these contact metasomatic processes.