THE MINING AND QUARRY INDUSTRY I9IO 5 1 



High Falls deposits have not been actively worked in the last five 

 years, though they were recently explored by diamond drilling. 



The mines at Stellaville operated by the St Lawrence Pyrite Co. 

 are opened on a parallel series of pyrite bodies, of which the largest 

 is known as the Stella. ' A second important deposit, the Anna, is 

 found in the footwall 1600 feet to the southeast and others occur 

 in the interval. The ore carries from 15 to 40 per cent of sulfur, 

 with an average probably between 25 and 30 per cent. The mine 

 output is crushed and concentrated so as to bring the sulfur up 

 to 40 per cent or more. The concentrates are shipped to acid 

 burners in the East. Though of lower sulfur content than the 

 imported ores they are desirable material for acid making on ac- 

 count of their freedom from arsenic and other injurious impurities. 



The Cole mine, just north of Gouverneur, is based on a large out- 

 cropping deposit that was first worked as an open cut. Under the 

 early operations by the Adirondack Pyrite Co. extensive shipments 

 of lump ore were made, as much of the output was sufficiently rich 

 to be used without concentration. The property was equipped with 

 a mill, however, for treating the leaner material. Recently work 

 has been renewed by the Hinckley Fibre Co., which used the output 

 last year in connection with sulfur pulp manufacture at Hinckley. 



Besides these mines there are many prospects and exposures of 

 pyrite in the metamorphic belt of Jefferson and St Lawrence coun- 

 ties. As has been noted by C. H. Smyth, the hematite ores of that 

 section are often accompanied by bodies of pyrite in the adjoining 

 wall rocks. The iron ores in fact have probably been derived from 

 the decomposition of the pyrite and their distribution affords a 

 useful clew to exploration for the latter mineral. Some of the bet- 

 ter known localities are on the Alexander Farr farm, two and a half 

 miles northeast of P)igelow ; on the George Styles farm one and a 

 Ijalf miles west of Bigelow ; S. Hendricks one mile south of Bige- 

 low ; and L. Plockens seven miles west of Rensselaer Falls. Near 

 Antwerp pyrite is found in vicinity of the Dixon and Old Sterling 

 mines ; it is also found farther north in the vicinity of Ox Bow. 



The pyrite industry in this section has not evidenced, hitherto, the 

 activity that might have been expected from its favorable situation 

 in regard to markets. The fact that the ores are low grade for the 

 most part has restricted their exploitation, as they could not be 

 shipped any distance without concentration. This has involved the 

 erection of expensive milling plants and a heavy outlav for other 

 development. 



