134 



R. BELL — NICKEL AND COPPER DEPOSITS OF SUDBURY. 



meuts are of every size, from mere grains to that of nuts and small and large 

 bowlders and even great horses. Sometimes the smaller pieces are packed 

 so closely together as to admit of the addition of little ore, while at other 



Figure 2— Section of decomposed Ore from Murray Mine. 



times the interspaces are wide and allow the introduction of large quantities 

 of solid ore. The chalcopyrite generally occurs in the midst of the pyrrhotite 

 as distinct masses of irregular form (sometimes quite large), or as streaks, 



Figure B—Hand Specimen of Ore from Stobie Mine. 



patches and spots ; but occasionally the two sulphides are more intimately 

 mingled. In a part where the pyrrhotite prevails, an included fragment of 



