120 NEW YORK STATE MUSEUM 



indicated northern extremity of the Phillips vein. If the presence 

 of a fault is assumed to account for the relations of the latter to the 

 main zone, the line would coincide with the probable direction of 

 displacement so that the drill hole actually may be considerably 

 above the horizon of the ore bodies. 



The Phillips vein has been tested by two drill holes. Two 

 parallel bodies of ore have been found with a thickness of 50 feet. 

 The dip is 8o° northwest. 



Chemical analyses. There is a wide range in the mineral com- 

 position of the ore and consequently in the chemical composition. 

 Some portions of the deposits have only small amounts of admixed 

 gangue minerals so that the iron content may run as high as 50 per 

 cent or even more. The quantity of such ore mined, however, is 

 not large when compared with the total output. On an average 

 the iron runs between the approximate limits of 30 and 35 per 

 cent. 



The analyses below furnish the essential details as to the chemi- 

 cal composition of the crude ore and of the concentrates made by 

 magnetic separation as now practised. No. 1 represents a sample 

 of relatively rich ore, such as was formerly shipped without con- 

 centration. No. 2 is an average of concentrating ore, and Nos. 

 3 and 4 of concentrates. For analyses Nos. 2 and 3 the writer is 

 indebted to Mr James Brakes, chemist at the mines. Analysis 

 No. 1 is quoted from an article by James M. Swank published in 

 the volume of the " Mineral Resources " for 1883 and 1884. 



Fe 2 3 47-38 3i-48 



FeO 21. 32 15.81 



FeO (gangue) 2.83 



Si0 2 20.89 33- 16 



Ti0 2 427 



S .084 .027 



P 2 5 057 .043 



A1 2 3 4.02 4.90 



MnO 21 .115 



CaO 3 . 72 4.96 



MgO 2. 11 2. 10 



K 2 1.438 



Na 2 2.283 



H 2 25 



60.128 



63 



.062 



28.850 



28 



.996 



• 257 

 6.880 







4 



.740 



• 417 



.022 









.031 



.023 





.012 



.900 





•339 



. 107 





•134 



.660 





.740 



• 405 





•434 



•494 



•777 











.040 







99.791 99.823 99.960 98. 



