﻿ADIRONDACK 
  MAGNETIC 
  IRON 
  ORES 
  1 
  27 
  

  

  been 
  mined 
  for 
  1600 
  feet 
  on 
  the 
  first 
  level 
  100 
  feet 
  below 
  the 
  surface, 
  

   while 
  a 
  second 
  level 
  75 
  feet 
  below 
  the 
  first 
  had 
  been 
  opened 
  on 
  the 
  

   west 
  end. 
  The 
  width 
  of 
  the 
  deposit 
  according 
  to 
  the 
  same 
  

   authority 
  averaged 
  20 
  feet, 
  thickening 
  to 
  30 
  feet 
  in 
  places. 
  In 
  1905 
  

   the 
  deposit 
  was 
  tested 
  by 
  diamond 
  drilling, 
  the 
  results 
  of 
  which 
  

   have 
  shown 
  that 
  it 
  is 
  irregular 
  and 
  pinches 
  in 
  places 
  to 
  a 
  thin 
  seam. 
  

   Of 
  the 
  12 
  holes 
  put 
  down 
  along 
  the 
  strike, 
  ore 
  was 
  found 
  in 
  all 
  

   but 
  three 
  and 
  the 
  maximum 
  thickness 
  was 
  22 
  feet 
  which 
  was 
  

   encountered 
  near 
  the 
  central 
  part 
  of 
  the 
  old 
  workings. 
  On 
  the 
  

   western 
  end, 
  the 
  body 
  apparently 
  is 
  broken 
  up 
  into 
  several 
  parallel 
  

   bands. 
  The 
  dip 
  estimated 
  from 
  the 
  data 
  obtained 
  in 
  the 
  drill 
  

   holes 
  ranges 
  from 
  45 
  to 
  65 
  east, 
  being 
  steepest 
  on 
  the 
  west. 
  

   Several 
  diabase 
  dikes 
  intersect 
  the 
  ore 
  body 
  and 
  are 
  said 
  to 
  mark 
  

   lines 
  of 
  faulting. 
  

  

  The 
  wall 
  rock, 
  judging 
  from 
  specimens 
  collected 
  along 
  the 
  sur- 
  

   face, 
  is 
  not 
  the 
  usual 
  reddish 
  granitic 
  variety 
  exposed 
  in 
  the 
  dis- 
  

   trict. 
  It 
  has 
  a 
  light 
  gray 
  color 
  and 
  is 
  made 
  up 
  almost 
  entirely 
  of 
  

   plagioclase, 
  quartz 
  and 
  magnetite. 
  The 
  plagioclase 
  belongs 
  to 
  the 
  

   basic 
  end 
  of 
  the 
  series, 
  corresponding 
  optically 
  to 
  labradorite. 
  

   The 
  composition 
  can 
  scarcely 
  be 
  identified 
  with 
  any 
  common 
  type 
  

   of 
  igneous 
  rocks, 
  but 
  rather 
  suggests 
  a 
  metamorphosed 
  sediment. 
  

   The 
  ore 
  is 
  a 
  mixture 
  of 
  magnetite 
  with 
  hornblende, 
  quartz 
  and 
  

   pegmatite, 
  the 
  percentage 
  of 
  iron 
  ranging 
  within 
  rather 
  wide 
  

   limits. 
  The 
  following 
  analyses 
  of 
  crude 
  ore 
  (1) 
  and 
  concentrates 
  

   (2) 
  are 
  given 
  by 
  Putnam 
  as 
  the 
  results 
  obtained 
  from 
  average 
  

   samples 
  : 
  

  

  1 
  2 
  

  

  Iron 
  34-28 
  66.78 
  

  

  Titanium 
  nil 
  nil 
  

  

  Phosphorus 
  .124 
  .037 
  

  

  From 
  two 
  to 
  three 
  tons 
  of 
  crude 
  ore 
  were 
  required 
  to 
  make 
  

   one 
  ton 
  of 
  concentrates 
  by 
  the 
  methods 
  of 
  hydraulic 
  separation 
  

   formerly 
  used. 
  

  

  The 
  output 
  of 
  the 
  mine 
  from 
  its 
  opening 
  in 
  1855 
  is 
  reported 
  by 
  

   Smock 
  at 
  260,000 
  tons; 
  though 
  not 
  specifically 
  mentioned 
  the 
  

   quantity 
  probably 
  represents 
  crude 
  ore. 
  

  

  Clayburg 
  mine. 
  Near 
  the 
  site 
  of 
  the 
  old 
  forges 
  at 
  Clayburg 
  

   are 
  two 
  pits, 
  the 
  openings 
  of 
  which 
  face 
  toward 
  the 
  Saranac 
  river. 
  

   The 
  larger 
  pit, 
  on 
  the 
  west 
  bank 
  and 
  somewhat 
  south 
  of 
  the 
  smaller 
  

   one 
  located 
  on 
  the 
  east 
  side 
  of 
  the 
  river, 
  is 
  several 
  hundred 
  feet 
  long 
  

   and 
  some 
  50 
  feet 
  deep. 
  It 
  is 
  partly 
  an 
  underground 
  drift. 
  The 
  

   strike 
  is 
  nearly 
  east 
  and 
  west 
  and 
  the 
  dip 
  almost 
  vertical 
  inclining 
  

  

  