Il8 NEW YORK STATE MUSEUM 



ascribed to a local bulge that has probably resulted from the fold- 

 ing. The large ore body found in the Hall slope very likely repre- 

 sents the combined front, middle and back veins which have con- 

 verged in depth. The walls are not well defined in this part, as the 

 ore grades along the contact into the country rock. Between slopes 

 5 and 16 the main or front vein averages about 20 feet across the 

 dip and is quite regular. The dip ranges from 45 to 6o° n. w., 

 being steeper at the north. The main workings here are slopes 

 7, 8, 12 and 14. A section across the ore bodies on line of the Hall 

 slope is given herewith [fig. 19]. 



The Williams or 82 mine lies 2000 feet northeast of slope 16 on 

 the prolongation of the same zone. It has not been operated for 

 many years. The workings comprise a shaft 180 feet deep and an 

 open cut extending north of the shaft for a distance of 200 feet. 

 The geologic relations here differ from those in the southern part 

 in that the wall rock is an amphibole schist. The deposit consists 

 of stringers and impregnations of magnetite in the schist, with 

 bands of lighter augite gneiss intercalated parallel to the foliation. 

 The ore varies in richness across the outcrop. The dip of the 

 strata is 8o° northwest at the surface, but is said to incline away 

 from the vertical gradually with depth. 



Drill tests. Mention may be made of the diamond drill borings 

 which have been put down to explore the ore bodies and which 

 show their approximate position outside the limits of present 

 workings. A drill hole located on the west side of West Mine 

 street, 1200 feet from the entrance to the Hall slope and in line 

 with its direction, found the ore at 663 feet depth with a thickness 

 of 100 feet. The indicated average dip of the ore body from the 

 outcrop to the point intersected by the hole is thus about 45. ° 



At a locality on the continuation of the same line but 800 feet 

 farther north, the ore was encountered at 103 1 feet and showed a 

 thiekness of 74 feet. The dip flattens considerably between the 

 two holes, averaging only 22 for the interval. 



On line with slope 15 and 6co feet distant from the shaft a drill 

 hole found the ore at 986 feet with a thickness of 80 feet. The 

 indicated dip is about 6o°. A second body of lean ore 20 feet thick 

 was found below the first separated from it by 15 feet of rock. 



A negative result was obtained by drilling 700 feet northwest of 

 the Weston pit. The hole was put down 1859 feet but failed to 

 find ore. The position of the hole is somewhat west of a line 

 drawn from the Burden pit, which approximately marks the 

 southwestern limits of the main zone as present known, to the 



