MINERAL RESOURCES OF THE STATE OF NEW YORK 



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The available resources of the titaniferous ores are very large. 

 The principal deposits are near the headwaters of the Hudson river, 

 on the southern slopes of the Mt Marcy group, Essex count}^ where 

 in an area of a few square miles are exposed a number of great ore 

 bodies whose possibilities are to be estimated in tens of millions of 

 tons. The iron content ranges from 40 to 60 per cent and the phos- 

 phorus usually is below the Bessemer limit. By crushing and 

 treating magnetically it is possible to effect a separation of the 

 magnetite and ihnenite, thereby reducing the proportions of titanic 

 oxide in the concentrates to one-half or less of that present in the 

 crude ore. 



A brief description follows of the more important individual 

 magnetite districts in the Adirondack area. Further particulars 

 may be found in New York State Museum Bulletin 119, " Geology 

 of the Adirondack Magnetic Iron Ores." 



Section across the Penfield pit, western portion. 

 along axis of fold 



Pegmatite developed 



Hammondville. This locality 13 miles west of Crown Point on 

 Lake Champlain, the nearest railroad point, has supplied 2,000,000 

 tons of mostly Bessemer ore. The mines were closed in 1893 during 

 the period of extreme depression in the Eastern iron trade, and all 

 the equipment has been removed from the property. It is known, 

 however, that considerable resources still remain. The m.agnetite 

 is restricted in occurrence to a light, finely granular gneiss which 

 outcrops over an area 2^ miles long by i| miles wide and resembles 

 somewhat in its general character the Mineville ore-bearing gneiss 

 which is regarded as a phase of the granite- syenite magma. In 

 all about thirty different openings exist in as many ore bodies; 

 the deposits of most importance are the Penfield and adjacent West 

 End, the Hammond, Dog Alley, North and No. 7, of which the 

 Penfield ranks among the larger bodies of its kind in the Adirondacks, 



