﻿144 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  magnetite-bearing 
  rock. 
  The 
  thickness 
  of 
  the 
  zone 
  as 
  shown 
  in 
  

   the 
  workings 
  ranges 
  tip 
  to 
  an 
  extreme 
  of 
  12 
  or 
  14 
  feet 
  in 
  width. 
  

   The 
  bands 
  of 
  rich 
  ore 
  vary 
  from 
  mere 
  films 
  to 
  2 
  or 
  3 
  feet. 
  The 
  

   ore 
  body 
  can 
  be 
  traced 
  along 
  the 
  strike 
  by 
  outcrop 
  and 
  dip-needle 
  

   readings 
  for 
  fully 
  a 
  mile. 
  

  

  A 
  second 
  smaller 
  body 
  occurs 
  about 
  a 
  mile 
  south 
  of 
  the 
  first. 
  It 
  

   has 
  been 
  opened 
  by 
  a 
  short 
  adit 
  at 
  one 
  point. 
  The 
  strike 
  is 
  paral- 
  

   lel 
  with 
  the 
  main 
  deposit, 
  but 
  the 
  dip 
  is 
  toward 
  the 
  north 
  at 
  a 
  low 
  

   angle, 
  while 
  the 
  latter 
  has 
  a 
  high 
  dip 
  southward. 
  An 
  area 
  of 
  

   granitic 
  gneiss 
  intervenes 
  between 
  the 
  two 
  deposits. 
  

  

  The 
  wall 
  rock 
  at 
  both 
  localities 
  is 
  gneissoid 
  syenite. 
  Of 
  the 
  ore 
  

   association, 
  Gushing 
  1 
  has 
  given 
  the 
  following 
  account 
  : 
  

  

  Inclosing 
  the 
  ore 
  and 
  grading 
  into 
  it, 
  is 
  a 
  very 
  basic 
  gneiss 
  com- 
  

   posed 
  of 
  hornblende, 
  magnetite, 
  augite, 
  feldspar 
  and 
  quartz, 
  the 
  

   black 
  minerals 
  constituting 
  7 
  5 
  per 
  cent 
  of 
  the 
  rock. 
  Hornblende 
  is 
  

   much 
  the 
  most 
  abundant 
  of 
  these. 
  About 
  equal 
  amounts 
  of 
  quartz 
  

   and 
  feldspar 
  are 
  present, 
  the 
  feldspar 
  being 
  part 
  oligoclase 
  and 
  part 
  

   orthoclase. 
  

  

  So 
  far 
  as 
  can 
  be 
  judged 
  from 
  specimens 
  obtained 
  from 
  the 
  

   dumps, 
  this 
  gneiss 
  grades 
  rapidly 
  into 
  a 
  more 
  feldspathic 
  horn- 
  

   blende 
  gneiss, 
  and 
  the 
  latter 
  into 
  syenite 
  gneiss, 
  at 
  first 
  basic 
  but 
  

   rapidly 
  becoming 
  more 
  acid. 
  

  

  The 
  gradation 
  between 
  ore 
  and 
  country 
  rock 
  is 
  very 
  noticeable; 
  

   no 
  well-defined 
  walls 
  exist, 
  but 
  there 
  is 
  a 
  shading 
  off 
  by 
  impercep- 
  

   tible 
  stages 
  from 
  one 
  to 
  the 
  other. 
  

  

  The 
  workings. 
  The 
  mining 
  developments 
  which 
  have 
  been 
  car- 
  

   ried 
  on 
  during 
  the 
  last 
  two 
  or 
  three 
  years 
  by 
  the 
  Salisbury 
  Steel 
  

   & 
  Iron 
  Co. 
  have 
  been 
  concentrated 
  on 
  the 
  western 
  portion 
  of 
  the 
  

   deposit 
  in 
  proximity 
  to 
  the 
  old 
  pits. 
  A 
  vertical 
  shaft 
  has 
  been 
  sunk 
  

   a 
  short 
  distance 
  north 
  of 
  the 
  main 
  pit. 
  It 
  has 
  been 
  carried 
  down 
  

   about 
  200 
  feet. 
  At 
  a 
  depth 
  of 
  100 
  feet 
  a 
  drift 
  has 
  been 
  extended 
  

   easterly 
  along 
  the 
  body, 
  while 
  a 
  second 
  level 
  with 
  drifts 
  to 
  the 
  east 
  

   and 
  west 
  has 
  been 
  opened 
  at 
  150 
  feet. 
  The 
  workings 
  are 
  about 
  

   14 
  feet 
  wide 
  near 
  the 
  shaft 
  on 
  the 
  second 
  level, 
  diminishing 
  to 
  3 
  

   or 
  4 
  feet 
  at 
  either 
  end. 
  

  

  Some 
  prospecting 
  has 
  been 
  done 
  at 
  points 
  east 
  of 
  the 
  shaft, 
  the 
  

   farthest 
  being 
  about 
  4000 
  feet 
  away. 
  The 
  deposit 
  appears 
  to 
  be 
  

   much 
  thinner 
  in 
  this 
  part. 
  

  

  Character 
  of 
  the 
  ore. 
  The 
  ore 
  consists 
  of 
  granular 
  and 
  massive 
  

   magnetite, 
  the 
  former 
  being 
  a 
  mixture 
  of 
  magnetite 
  and 
  the 
  minerals 
  

   of 
  the 
  wall 
  rock 
  and 
  the 
  latter 
  a 
  nearly 
  pure 
  magnetite 
  of 
  very 
  dense 
  

  

  z 
  Op. 
  cit. 
  p. 
  91. 
  

  

  