ELIZABETHTOWN AND PORT HENRY QUADRANGLES I49 



drawn. While the concentrates would doubtless be somewhat en- 

 riched in iron by ilmenite which would enter them, they would be 

 decreased by some inevitable losses in magnetite, and by just so 

 much as the titanium exceeded a very small value, say one per 

 cent, the operators of iron furnaces under present slag calculations 

 would regard them unfavorably. 



The conclusion is quite irresistible that only by smelting in the 

 crude or lump form, and by the development of a process which 

 does not find titanium objectionable, and under conditions where 

 ores of iron content of 35-45 could be utilized, can these deposits 

 be made available. Regarding the smelting of these ores, the follow- 

 ing papers by Mr A. J. Rossi should be consulted by any one 

 interested. Titaniferous Ores in the Blast Furnace [Am. Inst. 

 Min. Eng. Trans. 1893. 21 1832] ; The Smelting of Titaniferous 

 Ores [The Iron Age. Feb. 6, 20, 1896]. 



c Red hematite 



There is but one locality for this mineral and it is one of no 

 more than scientific importance. On the south side of McKenzie 

 brook, just west of the highway running south along the shore 

 from Port Henry, a series of pits was dug years ago upon a red 

 outcrop which suggested ore. The red color is due to hematite 

 which has developed as a decomposition product along a line of 

 faulting and crushing. The country rock is" a basic member of the 

 syenite series and the fault runs about n. 70° w. nearly parallel witii 

 the present brook. The decomposition of the pyroxene or horn- 

 blende has apparently 3aelded the red hematite, just as from simi- 

 lar causes certain portions of the richly apatitic ore at Mineville 

 are stained red. The present dumps along McKenzie brook dis- 

 play very lean and greatly slickensided material and there is little 

 reason to regard the occurrence as more than an interesting case of 

 faulting. 



2 Limestone 



a Flux and macadam. Limestones for these two purposes have 

 been chiefly quarried near Port Henry. For flux in the blast fur- 

 naces in former years the Grenville limestones were extensively 

 opened. They furnished a coarsely crystalline variety which was 

 a fairly pure calcite except in so far as this mineral was mixed 

 with disseminated silicates. All through the quarry faces streaks 

 of hornblende schist, bunches and lenses of pegmatite, and finely 

 disseminated pyroxenes often altered to serpentine, are present 



