REPORT OF THE DIRECTOR I916 303 



ZINC 



The production of zinc ore in 1916 was all made by one mine, 

 that of the Northern Ore Co., which began operations in the pre- 

 ceding year. The shipments were in the form of mill concentrates, 

 carrying around 48 or 49 per cent zinc. They were of such size as 

 to place the property on a very successful basis, in fact establishing 

 it as one of the prominent zinc mines in the east. Owing to the 

 fact that there were no other producers, the actual figures of output 

 are withheld from publication. 



The developments in the mine at Edwards have continued to be 

 favorable and have warranted the policy of gradual expansion of 

 operations. A verticlal shaft was started to intercept the ore bodies 

 on their extension in dip that have been worked through the Brown 

 incline. The shaft starts in the gneiss, overlying the limestone ore 

 formation. It is expected to continue the shaft to a depth of 

 around 800 feet but it will be used for production before that point 

 is reached, since the first ore body will be encountered at around 

 500 feet. The drift on the 400-foot level of the Brown shaft has 

 been extended northeast to test the ground explored by the White 

 and Williams shafts which are not used for hoisting, all the ore 

 from that section being taken to the Brown shaft on account of its 

 convenient situation. 



There is enough ore assured on the property to sustain operations 

 for several years to come. 



Prospecting was carried on in other parts of the district but no 

 deposit was actually developed to the productive stage. So far 

 little more than surface testing, supplemented by diamond drilling 

 in one or two places, has been undertaken. 



No new occurrences in addition to those listed in the report for 

 191 5 have been uncovered during the year. 



In southeastern New York preparations were under way for 

 restoring some of the old mining properties along the Shawangunk 

 mountain ridge, which were opened 75 years ago and worked for a 

 time for the lead content of the ore. The principal work in 1916 

 was in the Summitville property, which was taken over by the St 

 Nicholas Zinc Co. The ore body consists of a brecciated zone in 

 Shawangunk grit that has been filled by secondary quartz and the 

 sulphides of zinc, lead, iron and copper. The principal fracturing 

 has taken place along the bedding of the sandstone, and the vein 

 consequently conforms with the dip and strike of the wall rock, 

 although the boundary between ore and rock is more or less irregu- 



