﻿ADIRONDACK 
  MAGNETIC 
  IRON 
  ORES 
  145 
  

  

  structure. 
  The 
  granular 
  ore 
  has 
  a 
  fine 
  texture; 
  the 
  particles 
  of 
  

   magnetite 
  are 
  intimately 
  intermingled 
  with 
  pyroxene, 
  hornblende, 
  

   quartz 
  and 
  feldspar. 
  Veinlets 
  of 
  jasper 
  and 
  white 
  quartz 
  are 
  quite 
  

   common. 
  Pyrite 
  occurs 
  in 
  noticeable 
  quantity 
  on 
  the 
  east 
  end 
  of 
  

   the 
  zone, 
  but 
  is 
  not 
  much 
  in 
  evidence 
  elsewhere. 
  When 
  examined 
  

   under 
  the 
  microscope, 
  sections 
  of 
  the 
  rich 
  ore 
  show 
  inclusions 
  of 
  

   augite, 
  quartz 
  and 
  apatite, 
  but 
  "the 
  proportion 
  of 
  these 
  minerals 
  to 
  

   the 
  whole 
  mass 
  is 
  small 
  and 
  the 
  material 
  would 
  be 
  classed 
  as 
  ship- 
  

   ping 
  grade. 
  The 
  lean 
  ore 
  would 
  require 
  concentration. 
  An 
  

   analysis 
  furnished 
  by 
  the 
  Salisbury 
  Steel 
  & 
  Iron 
  Co. 
  shows 
  the 
  

   following 
  composition: 
  

  

  Fe 
  3 
  4 
  .... 
  : 
  86.99 
  

  

  Si0 
  2 
  6.39 
  

  

  S 
  034 
  

  

  ?A 
  136 
  

  

  A1 
  2 
  3 
  1. 
  14 
  

  

  MnO 
  46 
  

  

  CaO 
  2.83 
  

  

  MgO 
  ■.. 
  .65 
  

  

  99.854 
  

  

  Iron 
  62.99 
  

  

  Phosphorus 
  .52 
  

  

  