﻿I46 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Part 
  III 
  

  

  TITANIFEROUS 
  MAGNETITES 
  

  

  Under 
  this 
  class 
  are 
  included 
  the 
  magnetic 
  ores 
  of 
  the 
  Adirondacks 
  

   that 
  carry 
  titanium 
  as 
  an 
  essential 
  ingredient. 
  While 
  the 
  per- 
  

   centage 
  of 
  this 
  element 
  fluctuates 
  within 
  rather 
  wide 
  limits 
  as 
  shown 
  

   by 
  analysis 
  of 
  specimens 
  taken 
  from 
  different 
  localities, 
  the 
  mini- 
  

   mum 
  is 
  always 
  above 
  the 
  proportions 
  encountered 
  in 
  the 
  magnetites 
  

   previously 
  described. 
  In 
  the 
  general 
  run 
  it 
  amounts 
  to 
  at 
  least 
  8 
  

   or 
  9 
  per 
  cent 
  (as 
  Ti0 
  2 
  ) 
  and 
  will 
  average 
  perhaps 
  15 
  per 
  cent 
  in 
  the 
  

   majority 
  of 
  the 
  deposits. 
  It 
  is 
  due 
  solely 
  to 
  the 
  titanium 
  content 
  

   that 
  the 
  ores 
  have 
  not 
  been 
  more 
  actively 
  exploited. 
  Except 
  for 
  

   the 
  early 
  work 
  at 
  Lake 
  Sanford, 
  of 
  which 
  further 
  mention 
  is 
  made 
  

   on 
  a 
  subsequent 
  page 
  of 
  this 
  report, 
  there 
  has 
  been 
  no 
  active 
  min- 
  

   ing 
  of 
  the 
  deposits 
  in 
  the 
  region, 
  and 
  till 
  recently 
  little 
  interest 
  

   has 
  been 
  shown 
  generally 
  in 
  the 
  matter 
  of 
  commercial 
  utilization 
  

   of 
  titaniferous 
  ores. 
  

  

  The 
  Adirondack 
  region 
  is 
  a 
  familiar 
  one 
  in 
  the 
  literature 
  relating 
  

   to 
  these 
  ores. 
  The 
  descriptions 
  of 
  Emmons 
  1 
  who 
  was 
  the 
  first 
  to 
  

   draw 
  attention 
  to 
  the 
  large 
  ore 
  bodies 
  of 
  Lake 
  Sanford, 
  the 
  metal- 
  

   lurgical 
  experiments 
  of 
  Rossi 
  2 
  in 
  connection 
  With 
  the 
  same 
  bodies, 
  

   and 
  more 
  recently 
  the 
  detailed 
  accounts 
  by 
  Kemp 
  3 
  covering 
  prac- 
  

   tically 
  the 
  entire 
  series 
  of 
  occurrences 
  may 
  be 
  specially 
  noted. 
  

   The 
  investigation 
  of 
  the 
  geological 
  features 
  of 
  the 
  Adirondack 
  ores 
  

   has 
  been 
  carried 
  out 
  by 
  Professor 
  Kemp 
  in 
  a 
  manner 
  that 
  leaves 
  

   little 
  to 
  be 
  added, 
  and 
  his 
  descriptions 
  and 
  conclusions 
  have 
  been 
  

   closely 
  followed 
  in 
  the 
  present 
  work. 
  

  

  Distribution 
  of 
  the 
  ores 
  

  

  The 
  distribution 
  of 
  the 
  titaniferous 
  magnetites 
  is 
  conditioned 
  

   primarily 
  by 
  the 
  occurrence 
  of 
  the 
  gabbro-anorthosite 
  intrusions. 
  

   As 
  has 
  been 
  previously 
  noted, 
  the 
  principal 
  area 
  of 
  these 
  rocks 
  is 
  

  

  1 
  Survey 
  of 
  the 
  Second 
  Geological 
  District, 
  1842. 
  

  

  2 
  Titaniferous 
  Ores 
  in 
  the 
  Blast 
  Furnace. 
  Am. 
  Inst. 
  Min. 
  Eng. 
  Trans. 
  

   1892-93. 
  21:832. 
  Also 
  article 
  in 
  the 
  Iron 
  Age, 
  Feb. 
  6 
  and 
  20, 
  1896. 
  

  

  3Preliminary 
  Report 
  on 
  the 
  Geology 
  of 
  Essex 
  County. 
  N. 
  Y. 
  State 
  Mus, 
  

   49th 
  An. 
  Rep't. 
  v. 
  2. 
  1898. 
  The 
  Geology 
  of 
  Moriah 
  and 
  Westport 
  Town- 
  

   ships. 
  N. 
  Y. 
  State 
  Mus. 
  Bui. 
  14. 
  1895. 
  The 
  paper 
  " 
  Titaniferous 
  Ores 
  of 
  

   the 
  Adirondacks," 
  published 
  in 
  U. 
  S. 
  Geol. 
  Sur. 
  19th 
  An. 
  Rep't. 
  pt 
  III, 
  1899, 
  

   contains 
  much 
  additional 
  matter 
  relating 
  to 
  the 
  origin 
  and 
  chemical 
  nature 
  

   of 
  the 
  ores. 
  

  

  