GEOLOGY 



coast, and it is highly probable that no important deposits will 

 be found in the basic rocks of that side of the bay. 



Small quantities of copper-pyrites were observed in the dia- 

 base schists of the south side of Hudson strait, but never in 

 sufficient amounts to constitute mines of that mineral. 



I was informed by Captain Adams, of the whaler Diana, that 

 he had picked up specimens of copper ore lying loose on the 

 surface a few miles in rear of Clyde river on the east coast of 

 Baffin island. 



Among the specimens brought home by Hall from Frobisher 

 and Cyrus Field bays, in the southeast part of Baffin island, 

 were bornite and pyrite, showing that copper ores also occur in 

 that portion of the island. 



Iron. Mention has been made of the iron ores on the west 

 shores of Ungava -bay, on the north side of Payne river. The 

 rocks in which these ores are found have been altered by the 

 intrusion of granites. They now consist of quartzites, mica- 

 hornblende schist and crystalline limestone, and are the metam- 

 orphic representatives of the unaltered iron-bearing rocks of 

 the interior of Labrador peninsula and the east coast of Hud- 

 son bay. In localities where the rocks are unaltered the iron 

 ores occur either as carbonates in a cherty rock, or as a mixture 

 of magnetite and hematite intimately associated with chert 

 and jasper. At Payne river the iron-bearing beds have a thick- 

 ness of 420 feet. The upper 70 feet is a light-yellow, fine 

 granular quartzite containing patches of ankerite and lime. 

 Towards the top the rock shades to a dark bluish-gray, from 

 the presence of large quantities of magnetite in small flattened 

 grains, together with small scales of specular iron. These are 

 usually mixed with quartz with evidence of foliation, and at 

 other places are in large masses of nearly pure ore. Underlying 

 these beds is 350 feet of dark-bluish slaty quartzite holding con- 

 siderable magnetite and hematite, and shading upwards into a 



