MINERAL RESOURCES OF THE STATE OF NEW YORK II5 



The mines up to the present have shipped only a few hundred 

 thousand tons; the ore supply, however, is very extensive and under 

 favorable market conditions should be actively and profitably 

 exploited. 



Clifton. About lo miles north of Benson Mines are the Clifton 

 deposits which include a group of ore bands and lenses in hornblende 

 schist and along the contact of this rock and limestone, with a red 

 granitic gneiss extensively developed nearby that is intrusive in 

 the schist. The ores are sulphurous, made up of magnetite in a 

 gangue of hornblende, biotite, garnet and quartz, with pyrite and 

 pyrrhotite in varying amounts. The principal openings are on the 

 Dodge vein which has a width of 20 feet. Concentration would be 

 necessary for most of the material, as the average content is probably 

 under 40 per cent. The deposits were once worked by the Clifton 

 Mining Co., and a furnace at Clarksboro was run for a trme on the 

 product. The Parish ore body is north of this on Tracy pond outlet. 

 It affords a granular magnetite, free of sulphur, but containing some 

 garnet. It has not been explored to any extent, although the 

 magnetic attraction seems to indicate a considerable mineralized 

 area. Other deposits in this part of St Lawrence county are in the 

 town of Fine on the ridge limiting the Oswegatchie river, 4 miles 

 northwest of Oswegatchie village, and those at Jayville on the 

 Carthage & Adirondack Railroad, 14 miles west of Benson Mines. 

 The latter has been under exploration recently, but were last operated 

 actively 30 years ago. They consist of lenses and irregular bunches 

 of magnetite along the contact of Grenville gneiss and granite, and 

 are accompanied by abundant hornblende. 



Lake Sanford. Since the publication of the bulletin on the Adi- 

 rondack magnetites in 1908, the titaniferous ores at Lake Sanford 

 have undergone extensive exploration by the Maclntyre Iron Co. 

 The known resources have been enlarged enormously by tests with 

 the diamond drill which have demonstrated the continuity of the 

 deposits in depth already known to cover large areas. Experimen- 

 tation in the smelting of the ores in the blast furnace on a commercial 

 basis was carried out in 19 14 at Port Henry. Tests indicated that 

 no special difficulties are to be anticipated under normal furnace 

 practice, with charges containing one-third or one-fourth of the 

 titaniferous material in mixture — the limit to which the tests were 

 carried. The slags actually were more fluid than normal slags. 

 The pig iron contained about one-half of i per cent titanium and a 

 maximum of .1 per cent vanadium. There seem to be no insuperable 

 technical obstacles in the way of exploitation and utilization of these 

 ores, and it would be a great economic gain to have them developed. 



