﻿ADIRONDACK 
  MAGNETIC 
  IRON 
  ORES 
  53 
  

  

  bottom 
  on 
  encountering 
  a 
  brecciated 
  zone 
  which 
  probably 
  marks 
  

   an 
  extensive 
  fault. 
  A 
  drill 
  hole 
  was 
  put 
  down 
  to 
  a 
  depth 
  of 
  over 
  

   iooo 
  feet 
  but 
  failed 
  to 
  find 
  the 
  continuation 
  of 
  the 
  ore 
  beyond 
  the 
  

   fault 
  line. 
  

  

  The 
  North 
  pit 
  is 
  on 
  the 
  ridge 
  above 
  the 
  Penfield. 
  It 
  is 
  partly 
  

   an 
  open 
  cut, 
  with 
  a 
  chamber 
  running 
  off 
  to 
  the 
  southeast 
  on 
  the 
  

   course 
  of 
  the 
  shoot. 
  A 
  curious 
  feature 
  is 
  the 
  pods 
  of 
  ore 
  along 
  the 
  

   southern 
  edge 
  which 
  were 
  worked 
  through 
  short 
  inclines 
  driven 
  

   from 
  the 
  main 
  chamber. 
  Apparently 
  they 
  are 
  squeezed 
  portions 
  

   of 
  the 
  larger 
  body. 
  

  

  The 
  Blacksmith 
  mine 
  is 
  based 
  on 
  a 
  comparatively 
  small 
  deposit 
  

   which 
  lies 
  north 
  of 
  the 
  eastern 
  wing 
  of 
  the 
  Penfield. 
  The 
  ore 
  at 
  the 
  

   outcrop 
  is 
  from 
  three 
  to 
  five 
  feet 
  thick 
  and 
  dips 
  30 
  northeast. 
  

  

  Exploration. 
  The 
  ore-bearing 
  ground 
  has 
  been 
  tested 
  by 
  the 
  

   diamond 
  drill, 
  principally 
  with 
  a 
  view 
  to 
  locating 
  the 
  extensions 
  

   of 
  the 
  larger 
  ore 
  bodies. 
  The 
  drill 
  holes 
  have 
  been 
  mostly 
  limited 
  

   to 
  depths 
  not 
  exceeding 
  500 
  or 
  600 
  feet. 
  In 
  the 
  area 
  between 
  the 
  

   West 
  End 
  and 
  No. 
  5 
  workings, 
  ore 
  has 
  been 
  shown 
  to 
  exist 
  in 
  

   what 
  seems 
  to 
  be 
  a 
  flat 
  sheet 
  at 
  a 
  depth 
  of 
  from 
  460 
  to 
  500 
  feet, 
  

   and 
  with 
  a 
  thickness 
  of 
  from 
  3 
  to 
  15 
  feet 
  or 
  slightly 
  more. 
  Its 
  

   relation 
  to 
  the 
  contiguous 
  deposits 
  can 
  only 
  be 
  conjectured, 
  but 
  

   not 
  improbably 
  it 
  represents 
  an 
  extension 
  of 
  the 
  West 
  End. 
  

  

  So 
  far 
  as 
  has 
  been 
  observed 
  the 
  drills 
  have 
  not 
  encountered 
  

   any 
  limit 
  of 
  the 
  ore-bearing 
  gneiss 
  in 
  depth. 
  The 
  cores 
  show 
  the 
  

   rock 
  to 
  be 
  quite 
  uniform 
  in 
  character, 
  the 
  only 
  marked 
  variation 
  

   being 
  in 
  the 
  grain 
  which 
  at 
  times 
  becomes 
  coarse 
  owing 
  to 
  pegma- 
  

   titization. 
  The 
  occurrence 
  of 
  red 
  spots 
  and 
  streaks 
  on 
  the 
  other- 
  

   wise 
  white 
  core 
  is 
  considered 
  a 
  favorable 
  indication 
  of 
  the 
  prox- 
  

   imity 
  of 
  an 
  ore 
  body; 
  they 
  are 
  due 
  to 
  hematite 
  stain. 
  

  

  Character 
  of 
  the 
  ore. 
  The 
  Hammond 
  ville 
  ore 
  is 
  compact, 
  

   granular, 
  or 
  more 
  rarely, 
  a 
  platy 
  magnetite. 
  The 
  richest 
  variety 
  

   in 
  which 
  there 
  is 
  little 
  admixture 
  of 
  foreign 
  minerals 
  is 
  the 
  so 
  

   called 
  shot 
  ore 
  made 
  up 
  of 
  loosely 
  cemented 
  grains. 
  In 
  average 
  

   material 
  the 
  iron 
  content 
  is 
  about 
  50 
  per 
  cent, 
  the 
  magnetite 
  being 
  

   associated 
  with 
  quartz, 
  feldspar 
  and 
  hornblende. 
  White 
  vein 
  quartz 
  

   occurs 
  quite 
  abundantly 
  in 
  segregated 
  masses 
  and 
  stringers. 
  The 
  

   percentages 
  of 
  phosphorus 
  and 
  sulfur 
  are 
  low. 
  Of 
  the 
  following 
  

   analyses, 
  Nos. 
  1 
  and 
  2 
  have 
  been 
  taken 
  from 
  a 
  paper 
  on 
  " 
  The 
  

   American 
  Iron 
  Trade 
  "by 
  James 
  M. 
  Swank, 
  published 
  in 
  Mineral 
  

   Resources 
  for 
  1886. 
  Nos. 
  3, 
  4 
  and 
  5 
  are 
  from 
  Maynard's 
  paper 
  

   " 
  The 
  Iron 
  Ores 
  of 
  Lake 
  Champlain." 
  No. 
  3 
  is 
  the 
  result 
  from 
  an 
  

   average 
  sample 
  from 
  the 
  Hammond 
  mine; 
  No. 
  4 
  from 
  an 
  average 
  

  

  