144 



ellipsoidal or pillow structure. At the south 

 end of the first rock cutting north of mileage 

 153 there is Keewatin iron formation carrying 

 considerable iron pyrites ; at one point there is a 

 rusty band eight feet wide carrying streaks of 

 massive iron pyrites. The basic rocks are cut by 

 narrow, reddish, feldspathic dikes which 

 contain much mica. Just south of mileage 154, 

 one of these dikes, two feet in width, shows in 

 a rock cutting on the southwest side of the track. 

 Fifteen chains north of this mileage, a dark 

 mica lamprophyre cuts the greenstone. 



Marked ellipsoidal structure is seen at 

 mileage 156 on the northeast side of the track. 



159.74 m. Altitude 1,035 ft- (3 I 5-4 m -)- At Dane a 



256.7 km. 17-mile (27.3 km.) wagon road leads to the 



Larder Lake gold area, where the gold occurs in 



rusty-weathering carbonate and porphyry rocks 



which are cut by veinlets of quartz. 



At mileage 160^2, reddish syenite occurs on 

 the south side of the track. The high range of 

 hills observed to the south are reddish horn- 

 blende syenite which intrudes the Keewatin 

 greenstone. 



Just east of mileage 162 there is a rock cut- 

 ting through banded iron formation. The rock 

 is very rusty, and melanterite has been formed 

 from the disseminated iron pyrites. Keewatin 

 greenstone is observed continuously in the cut- 

 tings as far as Amikougami creek, east of 

 Swastika. The Lucky Cross mine is to 



the south of the track, just east of the 

 Amikougami creek, while about half a mile 

 to the southwest is the Swastika mine. Between 

 the last mentioned creek and the Blanche river is 

 a ridge of grey feldspar-porphyry. Along this 

 porphyry ridge a number of mining claims have 

 been staked out, and the chief gold veins occur 

 where the greenstone has been intruded by this 

 rock. 



