﻿172 
  EEPORT 
  UNITED 
  STATES 
  GEOLOGICAL 
  SURVEY. 
  

  

  MINES. 
  

  

  About 
  25 
  miles 
  southwest 
  of 
  Del 
  Norte 
  the 
  Summit 
  mining 
  district 
  is 
  

   located. 
  It 
  IS 
  the. 
  only 
  one 
  within 
  the 
  area 
  treated 
  of 
  in 
  this 
  chapter 
  

   A 
  few 
  years 
  ago 
  the 
  discovery 
  of 
  the 
  " 
  Little 
  Annie'' 
  there 
  created 
  7n 
  

   tense 
  excitement 
  in 
  the 
  mining 
  circles 
  of 
  Colorado. 
  Since 
  the^ 
  the 
  

   Little 
  Annie 
  has 
  been 
  worked 
  steadily, 
  and, 
  I 
  am 
  told 
  has 
  vieldpd 
  n 
  

   good 
  profit. 
  On 
  one 
  of 
  the 
  northern' 
  tributaries 
  of 
  the 
  illmosa 
  a 
  

   small 
  settlement 
  has 
  been 
  started, 
  at 
  the 
  northern 
  base 
  of 
  the 
  mount 
  

   n 
  .i"^'S" 
  "^^'"^ 
  ^^^ 
  °^^"'' 
  ^'^ 
  ^««^ted. 
  In 
  speaking 
  of 
  the 
  drSna^e 
  

   tin 
  tl 
  l" 
  ^/^°^^«^« 
  ^^^ 
  of 
  the 
  Alamosa, 
  the 
  - 
  red 
  stratum 
  ' 
  was 
  men 
  

   i«T 
  I'l.-^ 
  "^""^^-^ 
  my 
  experience 
  goes 
  in 
  the 
  mines 
  of 
  Southern 
  Colo- 
  

   s'ance 
  t 
  ^e 
  ]lZ.TJ'7v.'-' 
  '^' 
  ^''^''''''' 
  ^^ 
  ore 
  deposits, 
  and 
  in 
  this 
  n- 
  

   ?b?erved1, 
  thf 
  rpr.^^^'^f 
  P^^''°/ 
  ^'^^-^ 
  ^" 
  impregnation 
  similar 
  to 
  that 
  

   W 
  Ln. 
  I 
  f^, 
  «t/^t»"^' 
  Ascending 
  the 
  mountain 
  for 
  nearly 
  600 
  

  

  feet 
  from 
  the 
  creek-bed, 
  we 
  arrived 
  at 
  the 
  opening 
  denoting 
  the 
  Lime 
  

  

  wesT' 
  Thrabsolnfp 
  \f!^''''7\'^''- 
  *^^ 
  ^^" 
  '^ 
  ^ 
  ^^^^'^ 
  "° 
  ^o'^h 
  le- 
  

   west, 
  ihe 
  abso 
  ute 
  altitude 
  of 
  this 
  mine 
  is 
  about 
  11,900 
  feet 
  No 
  de 
  

  

  fined 
  vem 
  could 
  be 
  observed 
  there. 
  It 
  is 
  true 
  that 
  the 
  work 
  is 
  contin' 
  

  

  gu?d" 
  the' 
  Sr'"nn"°' 
  "'^^ 
  '''''^'' 
  "^^^-^^^^ 
  "- 
  -- 
  Lrsts,Vs\rh 
  To 
  

   wl 
  fT.n? 
  . 
  •* 
  • 
  ^i?"" 
  examination, 
  it 
  was 
  found 
  that 
  the 
  entire 
  rock 
  

   both 
  that 
  containing 
  the 
  " 
  pay 
  " 
  and 
  the 
  dead 
  rock, 
  was 
  alike 
  It 
  is 
  a 
  verv 
  

   highly 
  siliceous 
  feklspathic 
  paste, 
  similar 
  to 
  th'at 
  of 
  the 
  red 
  stratum 
  

   containing 
  si 
  iceous 
  concretions. 
  This 
  volcanic 
  material, 
  belonging 
  to 
  the 
  

   Se'' 
  nn' 
  '' 
  ^J^^^«"Siily 
  impregnated 
  with 
  minute 
  cry^taroSferous 
  

   SS 
  1 
  • 
  yPO" 
  decomposition 
  the 
  sulphur 
  escapes, 
  and 
  the 
  iron 
  s 
  co 
  n 
  

   verted 
  into 
  hydrated 
  sesquioxide 
  of 
  iron, 
  thus 
  fL 
  ng 
  the 
  gold 
  InT 
  

   cordance 
  therewith, 
  the 
  gold-ore 
  taken 
  from 
  the 
  Litile 
  An?i^e 
  contains 
  

  

  "s'tL'^J^^'eifhr*"' 
  \'''' 
  native 
  state, 
  occurring 
  in 
  fmTSso 
  

   stiings 
  ', 
  either 
  in 
  small 
  cavities 
  or 
  more 
  or 
  less 
  firmly 
  imbedded 
  in 
  the 
  

   quartz 
  or 
  quartzo-feldspathic 
  paste. 
  The 
  entire 
  mounLirwi 
  h 
  ts 
  nei 
  

  

  STnSr 
  thTe 
  V 
  ^^^'"^•^' 
  ^^ 
  '''' 
  '' 
  ''''' 
  ^"^-^" 
  BesideVrhe 
  

   ijutie 
  Annie, 
  three 
  more 
  openings 
  were 
  visited 
  • 
  the 
  Do^fpr 
  xk-h^u 
  c 
  

  

  strike 
  north 
  75o 
  east, 
  the 
  Golden 
  Star, 
  and 
  the 
  Golden 
  Q^e^n' 
  if 
  of 
  

   tLrnT/'^''"'/.?^" 
  T 
  '^^ 
  ^^" 
  t^^° 
  the 
  Little 
  Ann?e^ 
  It 
  was 
  not 
  ced 
  

   that 
  no 
  two 
  of 
  them 
  have 
  the 
  same 
  strike. 
  Afe 
  none 
  of 
  th^e 
  m 
  ues 
  

  

  T^it" 
  Tjune 
  28\8f.T 
  ^ff 
  '' 
  "^^^ 
  ^^^^ 
  ^^^^ 
  ^^^ 
  a't 
  the 
  tfme 
  o 
  Ty 
  

   Ilea 
  ^ 
  Th?m?nprJS^ 
  ''''fi 
  ^"'^ 
  "^^'^ 
  ^" 
  semblance 
  of 
  vein 
  be 
  disco/ 
  

   ■ 
  S'date 
  iww 
  ' 
  ^'^ 
  i^^ 
  owing 
  a 
  slight 
  fissure 
  of 
  comparatively 
  re- 
  

   tSfis 
  uVrthe^ro'^^^^ 
  of 
  an 
  inch 
  in 
  width. 
  On 
  either 
  side 
  of 
  

  

  inii> 
  nssure 
  tlie 
  rock 
  was 
  more 
  discolored, 
  by 
  sesQuioxide 
  of 
  iron 
  

  

  t?on" 
  wh/n! 
  I'^-r^r'i 
  T;^^°^^^ 
  ' 
  ^"^^ 
  this 
  discolorltionT 
  nl 
  £ed 
  a 
  d 
  'rec! 
  

   tion 
  which 
  might 
  be 
  followed 
  in 
  the 
  search 
  for 
  gold. 
  

  

  thP 
  n.?H^f 
  'Ti^'^?, 
  ^K^^""^ 
  ^«^^^^^ty 
  were 
  necessarily 
  cut 
  very 
  short 
  as 
  

  

  rrrrnX!/ones 
  Whe\he?J?^^^^^^^^ 
  "^i^ 
  ^^ 
  T'''' 
  '''''' 
  

  

  be 
  a 
  nnPcfiAn 
  f 
  ^^ 
  . 
  ^>'necner 
  allot 
  thit, 
  pyrite 
  is 
  auriferous, 
  however, 
  will 
  

  

  gold 
  men 
  ^iicS? 
  .!?'"'""- 
  '"^^"'^ 
  I" 
  ^'''^'- 
  ^' 
  ^' 
  P^^^i^^^ 
  that 
  tie 
  

   mininocHmrmusfh^^^^^^^^ 
  ^7^^^^ 
  quantities, 
  in 
  which 
  case 
  the 
  

  

  muuu^ 
  cia 
  ms 
  must 
  be 
  so 
  located 
  as 
  to 
  cover 
  the 
  zones. 
  Practical 
  nro«4 
  

  

  accoSh 
  'Tte?''^'? 
  -''^^ 
  '-'"'^ 
  '' 
  '' 
  '^''''^ 
  ^"^^ 
  ^-tion 
  willbe 
  taken 
  

   Tn^Hon,]'. 
  1 
  reaching 
  greater 
  depths 
  than 
  have 
  heretofore 
  been 
  

  

  ^^it^w^Ue^t^^^ 
  T"^ 
  ""'^^ 
  «P^"'^^^'^ 
  "^ 
  'ts 
  naTive 
  stat^ 
  

   of 
  ore 
  w 
  11 
  most 
  lihPlv 
  r?/'' 
  ^' 
  decomposed, 
  but 
  fresh, 
  and 
  the 
  milling 
  

   iiL 
  J 
  1 
  ■? 
  .,, 
  ^^ 
  receive 
  a 
  shock, 
  because 
  the 
  gold 
  contained 
  in 
  

   the 
  fresh 
  pyrite 
  will 
  not 
  amalgamate. 
  Inthatcase, 
  con^c^^ntr^t^on 
  o^^^^^^ 
  

  

  