﻿170 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  cn 
  a 
  ridge 
  in 
  contact 
  with 
  a 
  gneissoid 
  gabbro. 
  They 
  are 
  of 
  small 
  

   size 
  and 
  the 
  ore 
  is 
  lean. 
  

  

  Tunnel 
  mountain, 
  southeast 
  of 
  Elizabethtown 
  and 
  directly 
  east 
  

   of 
  Little 
  pond, 
  carries 
  a 
  deposit 
  which 
  outcrops 
  on 
  the 
  summit 
  

   and 
  has 
  been 
  opened 
  to 
  a 
  depth 
  of 
  40 
  or 
  50 
  feet. 
  The 
  pit 
  runs 
  

   about 
  north 
  and 
  south 
  and 
  is 
  10 
  feet 
  wide. 
  An 
  attempt 
  was 
  made 
  

   to 
  tap 
  the 
  deposit 
  by 
  a 
  tunnel 
  some 
  200 
  feet 
  below 
  the 
  outcrop, 
  

   but 
  was 
  given 
  up 
  before 
  reaching 
  the 
  ore. 
  An 
  analysis 
  of 
  the 
  ore 
  

   by 
  Hillebrand 
  gave 
  the 
  following 
  percentages: 
  

  

  Fe 
  2 
  3 
  20.35 
  

  

  FeO 
  28.82 
  

  

  Si0 
  2 
  13.35 
  

  

  Ti0 
  2 
  16.45 
  

  

  Cr 
  2 
  3 
  55 
  

  

  A1 
  2 
  3 
  8.75 
  

  

  CaO 
  2.15 
  

  

  MgO 
  6.63 
  

  

  PA 
  

  

  V 
  2 
  s 
  61 
  

  

  CO, 
  , 
  17 
  

  

  S 
  .09 
  

  

  C 
  tr. 
  

  

  CI 
  tr. 
  

  

  H 
  2 
  1.68 
  

  

  99. 
  62 
  

  

  Iron 
  35.99 
  

  

  On 
  the 
  east 
  slope 
  of 
  Tunnel 
  mountain 
  two 
  small 
  pits 
  have 
  been 
  

   excavated 
  in 
  lean 
  titaniferous 
  ore. 
  

  

  The 
  Humbug 
  vein, 
  north 
  of 
  Cook 
  shaft, 
  Mineville, 
  is 
  titan- 
  

   iferous 
  and 
  probably 
  occurs 
  in 
  gabbro, 
  though 
  its 
  associations 
  

   have 
  not 
  been 
  fully 
  determined. 
  The 
  ore 
  is 
  reported 
  to 
  carry 
  

   20 
  per 
  cent 
  TiO. 
  

  

  