83 



At La Rose mine the rocks en the west side of the fault 

 have been carried down a vertical distance of 210 or 220 

 feet, and at the McKinley-Darragh a vertical distance of at 

 least 250 feet. 



The diabase at the Little Nipissing dips S. E. at an 

 angle of 16 degrees, while at the Crown Reserve it has been 

 proved to dip more steeply at angles varying from 17 to 45 

 or 50 degrees to the N.W., from which it appears that the 

 sill occupies a basin-like depression in the underlying rocks 

 between these two properties. 



If the Kerr lake area be now studied it will be found 

 that the diabase inclines steeply to the N.W. and to the S.E. 

 of the axis of the lake, forming a saddle-like structure. It 

 may be seen dipping to the N.W. at the following points: 

 the southwest shore of Cross lake ; the northeast corner of 

 the north Drummond lot ; about 200 yards east of Kerr lake 

 and 25 yards north of the road (a diamond drill hole near 

 here has also proved the dip to be northerly ) ; a trench on 

 the Silver Leaf has exposed the contact of the diabase for 

 about fifty yards or more. On the south flank of this 

 saddle-like structure the diabase has been proved to dip 

 S.E. at the following points: the Valentine shaft; a 

 vertical diamond drill hole on the south part of the south 

 Drummond lot; shaft Xo. 5 of the Drummond mine; shaft 

 No. 1 of the Hargrave; two drifts from the No. 3 shaft of 

 the Kerr lake ; a drift from the 369-foot level of the No. 3 

 shaft of the Hargrave. From the above data it is thus seen 

 that the saddle-like structure of the diabase at Kerr lake has 

 been proved at several points. But it may be added that 

 some of the steep inclinations of the sill may be partly due 

 to faulting. There is, for example, a well defined fault in 

 the diabase at the Crown Reserve. 540 feet north of the shaft 

 in the drift at the first level, dipping 15 or 20 degrees to 

 the north. Again on the south side of the saddle-like 

 structure a fault, dipping to the southeast, was encountered 

 at the Hargraves and Drummond. 



At the Lumsden a shaft was sunk in the Keewatin to a 

 depth of 290 feet, where it passed into the Nioissing diabase, 

 proving that the sill here dips beneath the Keewatin green- 

 stones at an angle of about 26 degrees. Similar relations 

 are known to obtain at other points along the same contact 

 to the southwest as far as Mount Grevwacke 



