ABSTRACT: The Celaller tin mineralisation, is observed with in `the hematite and tourmaline bearing quartz veins which occur the grcïsenised marginal zones of a granite. The tin mineral is cassiterite, fThe hematite, bearing quartz veins are richer in. cassiterite than other win types, the tourmalin bearing quartz veins contain rare and. small, eassiterite crystals. The first in sit« cassiterite mineralisation found in Anatolia, occurs in the Celaller region..