238 /. M. BELL 



the most interesting observed is that seen north of Lake Charlotte, 

 an irregular sheet of water about two miles long, lying within an 

 embayment in granitic rocks just north of Kabenung Lake, and 

 within a few miles of the Dog River, The rocks exposed along the 

 chffs which flank the northern shore of the lake consist of rusty and 

 sometimes banded cherts, with quartz-magnetite, hornblendic schists 

 and epidote schists, which represent metamorphosed Helen Rocks 

 and Michipicoten schists. A short distance north from the shore, 

 and interstratified with the metamorphic schists, are narrow bands 

 of a light-colored felsite and of coarse-grained quartz-porphyry. 

 Northward from the lake shore these sheets of acid igneous rock 

 increase in width, become more granitic, and are of more frequent 

 occurrence. Moreover, they are often joined one to the other by 

 narrow apophyses of similar rocks. About one half-mile north from 

 the lake granites alone are seen, though occasional small inclusions 

 of schist are of somewhat common occurrence within them, especially 

 close to the contact. Immediately south of the "final contact" the 

 schists are so much metamorphosed that they consist almost entirely 

 of epidote and similar metamorphic minerals, or else are so dense 

 and fine-grained that they are indistinguishable from a hornfels. 

 The granite is of the usual medium-grained, light-pinkish type, and, 

 though distinctly sheared, is not perceptibly laminated, and so could 

 hardly be called gneiss. This granite is apparently part of the great 

 area of acid igneous rocks which stretches northward to within a 

 few miles of Hudson Bay. 



An excellent contact between the granitic rocks and the Helen 

 Formation is shown at Mount Raymond, one of the most prominent 

 hills in the Michipicoten area, and which lies just west of Paint 

 Lake and within a mile of the Frances Mine. At this point the 

 Helen Formation is cut by a wide dyke of porphyritic granitic rocks, 

 which forms the most prominent part of Mount Raymond. The 

 iron-bearing rocks are metamorphosed into actinolitic and griineritic 

 magnetite schists. Contact deposits of impure magnetite occur 

 close to the border of the dyke, and a wide vein of quartz, which is 

 decidedly pyritous and slightly auriferous, has developed within 

 the adjoining rocks. Compared with the intense metamorphic 

 effect exerted by this granite, the decided lack of visible metamorphic 



