 However, the degree of talc-carbonation is usually somewhere between the two end-member compositions of pure serpentinite and pure talc-carbonate.It is common to see serpentinites which contain talc, amphibole and chloritic minerals in small proportions which infer the presence of carbon dioxide in the metamorphic fluid.Talc carbonate is present in many of the ultramafic bodies of the Archaean Yilgarn Craton, Western Australia.