Abstract: Asbestos deposits of Mihalıccık region occur at local shear zones along the contact between metamorphicand serpentinized ultrabasic rocks. Metamorphic rocks were intensely laminated, serpentinites were fractured and forcefully injected in metamorphic rocks at such shear zones. Metamorphic rocks are chloritized, and fractures withinserpentinites are filled with picrolite, asbestos, talc and quartz. Such mineralogical changes are caused by frictional heatand solutions circulating within fractures at such shear zones. Glaueophane has two distinct origin in this area: it hasdeveloped within the metamorphic rocks as a result of burial metamorphism on a regional scale and locally, it hasdeveloped with metamorphic rocks around shear zones due to heat and circulation of solutions.