﻿ADIRONDACK 
  MAGNETIC 
  IRON 
  ORES 
  

  

  29 
  

  

  specimens 
  taken 
  for 
  analysis 
  indicate 
  close 
  resemblances 
  in 
  many 
  

   cases 
  to 
  the 
  ore-bearing 
  rocks. 
  Professor 
  Cushing 
  has 
  worked 
  out 
  

   the 
  corresponding 
  mineralogic 
  composition 
  and 
  it 
  will 
  be 
  of 
  interest 
  

   to 
  note 
  the 
  relative 
  quantities 
  of 
  magnetite 
  present. 
  

  

  Si0 
  2 
  .. 
  

   AUO3. 
  

   Fe 
  2 
  3 
  . 
  

   FeO.. 
  

   MgO.. 
  

   CaO. 
  . 
  

   Na 
  2 
  0. 
  

   K 
  2 
  0. 
  . 
  

   H 
  2 
  0.. 
  

   TiQ 
  2 
  .. 
  

  

  p 
  2 
  o 
  s 
  .. 
  

  

  CI.... 
  

  

  F 
  

  

  S 
  

  

  MnO.. 
  

   BaO.. 
  

  

  1 
  

   54.10 
  

   17-45 
  

   4-52 
  

   6.47 
  

   2-33 
  

   6. 
  17 
  

   3.81 
  

   3.06 
  

  

  •57 
  

   .19 
  

   .88 
  

  

  2 
  

  

  3 
  

  

  4 
  

  

  5 
  

  

  6 
  

  

  7 
  

  

  59 
  • 
  7o 
  

  

  61 
  .01 
  

  

  62.85 
  

  

  63-45 
  

  

  66 
  . 
  72 
  

  

  68.50 
  

  

  19-52 
  

  

  I5-36 
  

  

  16.80 
  

  

  18.38 
  

  

  16.15 
  

  

  14.69 
  

  

  1.89 
  

  

  2.98 
  

  

  2 
  .96 
  

  

  1 
  .09 
  

  

  1.23 
  

  

  1-34 
  

  

  4.92 
  

  

  7-77 
  

  

  2.89 
  

  

  2 
  .69 
  

  

  2 
  . 
  19 
  

  

  325 
  

  

  .78 
  

  

  .78 
  

  

  1.48 
  

  

  •35 
  

  

  •73 
  

  

  .26 
  

  

  336 
  

  

  4-05 
  

  

  324 
  

  

  3.06 
  

  

  2.30 
  

  

  2 
  . 
  20 
  

  

  5-3i 
  

  

  3.68 
  

  

  4.09 
  

  

  5.06 
  

  

  4-3 
  6 
  

  

  3-5° 
  

  

  4.14 
  

  

  3-9° 
  

  

  5-49 
  

  

  5-i5 
  

  

  5-66 
  

  

  5 
  -9° 
  

  

  •52 
  

  

  .49 
  

  

  •37 
  

   .09 
  

  

  • 
  13 
  

  

  •30 
  

   .07 
  

  

  •77 
  

  

  .40 
  

   •03 
  

  

  05 
  

   14 
  

  

  35 
  

   10 
  

  

  09 
  

  

  .08 
  

  

  .01 
  

   .02 
  

   . 
  21 
  

   .06 
  

  

  tr. 
  

   13 
  

  

  07 
  

  

  JO 
  

  

  05 
  

  

  Magnetite 
  

  

  100.19 
  100.23 
  100.10 
  100.69 
  99-73 
  100.18 
  100.22 
  

   6^57 
  

  

  2-73 
  

  

  4-3 
  2 
  

  

  4.29 
  

  

  i-5< 
  

  

  1.85 
  

  

  86 
  

  

  1 
  Basic 
  syenite 
  from 
  near 
  Raquette 
  falls. 
  E. 
  W. 
  Morley, 
  analyst. 
  

  

  2 
  Augite 
  syenite, 
  road 
  from 
  Tupper 
  Lake 
  to 
  Wawbeek. 
  E. 
  W. 
  

   Morley, 
  analyst. 
  

  

  3 
  Augite 
  syenite, 
  3 
  J 
  miles 
  north 
  of 
  Tupper 
  Lake 
  Junction. 
  E. 
  W. 
  

   Morley, 
  analyst. 
  

  

  4 
  Red, 
  quartz, 
  hornblende 
  syenite 
  from 
  north 
  boundary 
  of 
  

   Litchfield 
  park. 
  E. 
  W. 
  Morley, 
  analyst. 
  

  

  5 
  Augite 
  syenite, 
  Loon 
  Lake, 
  Franklin 
  county. 
  E. 
  W. 
  Morley, 
  

   analyst. 
  

  

  6 
  Augite 
  syenite, 
  Little 
  Falls, 
  Herkimer 
  co. 
  E. 
  W. 
  Morley, 
  

   analyst. 
  

  

  7 
  Quartz, 
  augite 
  syenite, 
  2 
  J 
  miles 
  south 
  of 
  Willis 
  pond, 
  Franklin 
  

   county. 
  E. 
  W. 
  Morley, 
  analyst. 
  

  

  With 
  the 
  exception 
  of 
  No. 
  6 
  (syenite 
  from 
  Little 
  Falls) 
  the 
  rocks 
  

   represented 
  are 
  from 
  the 
  interior 
  of 
  the 
  Adirondacks, 
  away 
  from 
  

   the 
  mine 
  localities. 
  

  

  2 
  Sedimentary 
  group. 
  The 
  association 
  of 
  magnetites 
  with 
  dis- 
  

   tinctly 
  Grenville 
  types 
  of 
  gneisses 
  and 
  schists 
  is 
  characteristic 
  for 
  the 
  

   St 
  Lawrence 
  county 
  occurrences, 
  as 
  well 
  as 
  for 
  some 
  in 
  southern 
  

  

  