The Chalu Fe skarn developed at the contacts of the part of intrusive body with monzodiorite composition and Cretaceous carbonate rocks. Endoskarn which occurs in a limited area is characterized by andradite rich garnet (Ad₉₀Gr₅Sp₃) and clinopyroxene. The calcic exoskarn shows a continuous mineralogical evolution and zonation with increasing distant from contact. It is composed mainly of coarse- grained vesuvianite and garnet (Ad₅₃Gr₄₃Py₂), in proximal zone to fine grained calcite, garnet (Ad₂₇Gr₇₁Py₂) and vesuvianite in distal zone. The chemical compositions of garnet and vesuvianite in different parts of exoskarn indicate an evolutionary trend of increasing CO₂ and H₂O in the fluid, decreasing fO₂, decreasing temperature. Hematite flakes (specularite) and magnetite which contain the main ore mineralization accompanied by Fe sulphides (pyrite and chalcopyrite) and secondary malachite, limonite and goethite.