Fig. 28 Photomicrograph of gabbro associated with the ore at pyrites, showing 

 an infiltration of pyrite replacing feldspar. (Magnified 83.5 diameters) 



Fig. 29 Photomicrograph of l-^an ore. rvrites, showing pyrite replacing a single 

 grain of plagioclase feldspar. (Magnified 83.5 diameters) 



