﻿FOURTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  igoy 
  33 
  

  

  the 
  evidence 
  is 
  insufficient 
  at 
  present 
  to 
  place 
  the 
  magnetites 
  defi- 
  

   nitely 
  with 
  either. 
  The 
  igneous 
  rocks 
  which 
  carry 
  the 
  ore 
  belong 
  

   to 
  several 
  types, 
  ranging 
  from 
  acid 
  granites 
  on 
  the 
  one 
  hand 
  to 
  

   granites 
  poor 
  in 
  quartz, 
  syenites 
  and 
  even 
  more 
  basic 
  phases 
  that 
  

   approach 
  the 
  gabbro-anorthosite 
  group 
  which 
  contains 
  the 
  titanifer- 
  

   ous 
  ores. 
  It 
  appears 
  very 
  probable 
  that 
  there 
  is 
  a 
  close 
  relation 
  in 
  

   the 
  geological 
  occurrence 
  of 
  both 
  classes 
  of 
  ores 
  found 
  in 
  the 
  igneous 
  

   rocks, 
  since 
  the 
  latter 
  show 
  the 
  most 
  intimate 
  connection 
  in 
  their 
  

   fundamental 
  characters. 
  Like 
  the 
  titaniferous 
  class, 
  the 
  low- 
  

   titanium 
  ores 
  (they 
  are 
  not 
  strictly 
  nontitaniferous) 
  are 
  native 
  to 
  

   the 
  wall 
  rocks 
  and 
  have 
  formed 
  in 
  their 
  present 
  place 
  by 
  some 
  

   process 
  incident 
  to 
  the 
  cooling 
  and 
  consolidation 
  of 
  the 
  latter. 
  

   Magmatic 
  segregation 
  has 
  perhaps 
  been 
  influential 
  in 
  some 
  instances, 
  

   as 
  has 
  already 
  been 
  pointed 
  out 
  by 
  Cushing, 
  but 
  the 
  mineral 
  asso- 
  

   ciations 
  of 
  most 
  of 
  the 
  magnetites 
  point 
  to 
  gaseous 
  or 
  gas-aqueous 
  

   agencies 
  as 
  the 
  more 
  important 
  factor 
  in 
  the 
  process 
  of 
  formation. 
  

   The 
  ore 
  bodies 
  originated 
  previous 
  to 
  the 
  dynamic 
  stresses 
  which 
  

   have 
  affected 
  the 
  whole 
  region 
  and 
  thus 
  have 
  been 
  drawn 
  out 
  and 
  

   alined 
  parallel 
  to 
  the 
  general 
  foliation. 
  The 
  magnetites 
  found 
  in 
  

   the 
  sedimentary 
  gneisses 
  differ 
  from 
  the 
  others 
  in 
  several 
  respects. 
  

   They 
  are 
  always 
  pyritic 
  and 
  have, 
  as 
  associated 
  minerals, 
  garnet, 
  

   scapolite, 
  sillimanite 
  and 
  usually 
  much 
  hornblende. 
  Their 
  origin 
  

   is 
  doubtful 
  as 
  the 
  evidence 
  bearing 
  upon 
  it 
  is 
  subject 
  to 
  different 
  

   interpretations. 
  They 
  may 
  be 
  ancient 
  beds 
  inter 
  stratified 
  with 
  the 
  

   wall 
  rocks 
  or 
  later 
  introductions 
  due 
  to 
  ground 
  waters 
  or 
  insula- 
  

   tions 
  set 
  up 
  by 
  the 
  igneous 
  invasions. 
  They 
  are 
  frequently 
  cut 
  by 
  

   granitic 
  masses 
  and 
  they 
  are 
  possibly 
  an 
  older 
  series 
  than 
  the 
  other 
  

   magnetites. 
  

  

  The 
  mining 
  industry 
  of 
  the 
  Adirondacks 
  has 
  grown 
  considerably 
  

   in 
  the 
  last 
  two 
  or 
  three 
  years. 
  The 
  outlook 
  for 
  its 
  future 
  seems 
  

   quite 
  promising. 
  Not 
  only 
  are 
  the 
  low-titanium 
  ores 
  being 
  de- 
  

   veloped 
  on 
  a 
  larger 
  scale 
  than 
  previously, 
  but 
  there 
  is 
  a 
  good 
  pros- 
  

   pect 
  that 
  the 
  titaniferous 
  deposits 
  will 
  soon 
  be 
  worked 
  on 
  a 
  com- 
  

   mercial 
  scale. 
  The 
  new 
  enterprise 
  at 
  Lake 
  Sanford, 
  mentioned 
  in 
  

   the 
  issue 
  of 
  this 
  report 
  for 
  1906, 
  has 
  been 
  active 
  during 
  the 
  current 
  

   year 
  in 
  carrying 
  on 
  investigations 
  ; 
  productive 
  operations 
  only 
  await 
  

   the 
  construction 
  of 
  a 
  railroad 
  to 
  the 
  locality 
  which 
  is 
  in 
  a 
  now 
  inac- 
  

   cessible 
  part 
  of 
  the 
  Adirondacks. 
  

  

  In 
  accordance 
  with 
  the 
  recommendation 
  made 
  in 
  my 
  report 
  of 
  

   last 
  year 
  the 
  Legislature 
  granted 
  a 
  specific 
  appropriation 
  for 
  the 
  

   exploitation 
  of 
  the 
  Clinton 
  hematite 
  ores 
  of 
  central 
  New 
  York. 
  It 
  

   was 
  therein 
  pointed 
  out 
  that 
  a 
  large 
  body 
  of 
  these 
  ores 
  lies 
  almost 
  

  

  