IOO 



NEW YORK STATE MUSEUL 



Total iron 48.43 52.22 70.60 



Phosphorus .002 .008 .07 



Analyses 1 "and 2 are of crude ore from the Peru Steel Co.'s 

 mines at the north end. No. 3 is of the concentrates from the same 

 locality. It is noticeable that the latter carries higher phosphorus 

 than the former while under ordinary circumstances the opposite 

 should be the case. The general run of ore would be classed as of 

 Bessemer grade. The iron made from it was used mostly in making 

 steel by the crucible process and commanded a relatively high price. 



Salisbury mine. This mine is situated 2 miles south of Salisbury 

 Center, Herkimer co. It was exploited to some extent a number 

 of years ago, and recently it has been reopened by the Salisbury 

 Steel & Iron Co. The nearest point of shipment is Dolgeville, the 

 terminus of a short railroad running north from Little Falls. The 

 region lies on the southern border of the Adirondacks, but within 

 the limits of the Precambric formations. The latter are represented 

 by gneisses of varied character. The predominant type is composed 

 in the main of feldspar, augite, hornblende and quartz and is allied 

 to the syenites. Its origin according to Cushing is pro'oably igneous. 

 There are also quartzose gneisses and schists, more or less involved 

 with crystalline limestone, that are to be classed with the Grenville 

 sedimentary formation and small areas of granitic intrusives. 1 



The ore bodies occur within the syenite gneiss. They outcrop 

 in a nearly east-west direction and have a dip of about 75 to the 

 south. The principal deposit is an elongated lens which has been 

 shown to extend several hundred feet along the strike. 



A considerable quantity 'of ore was mined during the early period 

 of operations by open pits and slopes that are now abandoned. The 

 present workings include a vertical shaft that has been sunk to a 

 depth of 150 feet and drifts on the course of the ore body at dis- 

 tances of 100 and 150 feet respectively from the surface. The width 

 of the ore body as shown in these workings ranges from 2 to 12 feet. 



The magnetite occurs in bands and irregular masses alternating 

 with rock and also an intimate mixture with the latter. In -prox- 

 ■imity to the walls the gneiss becomes darker and more basic than 

 the usual country due to the predominance of the hornblende and 

 augite over the feldspar. There is much of this rock all through 

 the ore body, as well as veins of quartz and jasper. The richer 

 material has a massive or platy texture. It runs high in iron, though 



'^Consult Cushing. Geology ^o' the Vicinity of Little Falls. Herkimer County. N. Y. 

 State Mus Bui. 77^1905. 71 



