actinolite anglesite apatite banded iron formation beryl carbonate chemical equilibrium copper corundum dolostone epidote evaporite feldspathoid fluorite garnet gold granite graphite greisen hematite hornfels igneous rock iron lead limestone magma magnetite marble metamorphic reaction metamorphic rock metamorphism metasomatism mineral molybdenum ok tedi mine ore ore genesis potassium pyroxene redox salt scapolite sedimentary rock stockwork strontianite tantalite tin topaz tourmaline tungsten wollastonite zinc