1988 Volume 38 Issue 207 Pages 15-25
The geochemistry of the massive sulfides and their country rocks from the Coastal Range of southern Chile (between latitudes 39° and 42°S) is discussed.
The FeS content in sphalerite which is in equilibrium with pyrite and pyrrhotite allows to get 2.5 kbar as the equilibrium pressure for the last metamorphic event. Preliminary sulfur isotope analysis of pyrite gives the average value of δ34S=+2.5 per mil.
Based on the geochemical study on the sulfides (Cu, Zn, Mn, Co, Ag, Cd, etc.) and major and rare earth elements of their country rocks, it is concluded that the massive sulfide deposits are similar to either.Besshi-type ore deposits in Japan or those in the Norwegian Caledonian Mountains(e.g. Løkken).
