THE PORCUPINE AREA 



BY 



A. G. Burrows. 



CONTENTS. 



PAGE 



Introduction no 



Ingress to the area no 



Elevation of the area no 



The first prospecting 112 



Superficial deposits 113 



Forest fires 113 



Timber 115 



Geology 115 



Pleistocene 115 



Pre-Cambrian 115 



Keewatin 116 



Basic rocks 116 



Acidic rocks 118 



Iron formation • 120 



Carbonate rocks 121 



Laurentian 121 



The Temiskaming series 123 



The Cobalt series 124 



Later Intrusives 124 



The Gold Deposits 126 



Origin 126 



Character of gold-bearing deposits 128 



Distribution of veins 132 



Occurrence of the gold 132 



Microscopical and other characteristics. . . . 134 



Mining and Milling 138 



Annotated Guide Haileybury to Swastika, Iroquois 



Falls Junction and Porcupine 141 



