IRON ORES 



341 



and near some prospects that he has opened make it seem probable 

 that the ore will prove titaniferous, but no analyses are available. 

 The Barton Hill mines and their prolongation, the Fisher Hill and 

 Burt Lot openings are bessemer, and some lots have been found 

 surprisingly low in phosphorus. They occur at a higher horizon in 

 the gneisses than the Mineville group as will be later shown by 

 sections. 



TABLE OF ANALYSES 



Mine . 

 Authority . 



Fe 



P 



Ti0 



Bessemer Ores - 



Barton Hill. 



Birkinbine , 



65 12 



0289 



Fisher Hill .. 



Tenth Census. 



46.96 



0.03 



present. 



Non-Bessemer Ores - 



Welch Shaft 



Miller. 



Old Bed. 



"21" 



do 



do 



do 



do 



57.71 



60.54 



62.64 



62 10 



1.266 



0.830 



0.908 



1.198 



present. 



present 



present 



present 



Cook Shaft 

 do 

 62.80 

 870 

 present. 







' 



Titaniferous Ore. 





Tenth Census. 

 63.86 

 680 

 present. 



do. 

 45 01 

 047 

 Absent 



Split Rock 



"U77"' 



"l3.15"" 



do 



'3259 

 14.70 



do 



'4042 

 16 37 



j Cook Shaft — 

 I Humbug Vein — 

 F. S. Witherbee. 



p 



TiO„ 



Circa 20. 







In the octahedral ore of the Lovers Hole Mine, T. R. Wood- 

 bridge found with iron 68.58 and phosphorus .004, titanic oxide 

 .147. Thus where found in these ores it is in very minute amount. 



The beds are often disturbed by small faults and very frequently 

 these are occasioned by the intrusion of a trap dike. In fact hardly 

 a mine has failed to reveal these. Profounder faults may also 

 intervene and cut off the ore entirely as at the Cheever mine. 



The ores in the richest forms are granular. They have for a 

 gangue, pyroxene as a general tiling, and in the thin sections of 

 lean ores this is seen to be of a brilliant emerald green hue, though 

 black in the thicker masses. Grains of apatite are at times very 

 abundant, and are present in most of the mines. Pyrite is notable 

 in a few. Bessemer ores are afforded by several very large openings. 



GENERAL FEATURES OF THE TITANIFEROUS ORES. 

 The titaniferous ores are in true igneous gabbro, which has been 

 more or less metamorphosed and to which a foliation or banding 

 has been imparted by pressure. The ore-bodies are thus flattened 



