COPPER    MINES    OF    THE    UNITED    STATES WASHINGTON. 
123 
Development  of  these  ore  bodies  has  been  very  extensive.  It  is  possible  to  walk  for 
nearly  5  miles  in  one  general  direction  underground,  and  the  Ontario  shaft  is  2,000  feet  deep. 
The  Ontario,  Daly  West,  Daly  Judge,  and  Silver  King  are  the  largest  companies. 
Tintic  produced  2,118,432  pounds  of  copper  ore  in  1904,  carrying  59,213  ounces  of  gold 
and  1,655,139  ounces  of  silver,  contained  in  262,680  tons  of  ore  and  concentrates.  The  cop- 
per was  about  equal  in  value  to  the  gold  content  of  the  ore,  the  combined  value  of  gold 
and  copper  being  $546,805,  as  against  6,126,332  ounces  of  silver  and  lead. 
Bingham  produced  705,792  tons  of  ore  in  1904,  of  which  137,979  tons  were  milling  ore, 
yielding  9,515  tons  concentrates,  valued  at  $510,291.  The  district  yields  practically  no 
siliceous  ore,  and  the  copper  produced  carried  54,609  ounces  of  gold  and  906,70s  ounces  of 
silver. 
Mercur,  Tooele  County,  yielded  1,023,825  pounds  of  copper  in  1904,  of  a  value  of  $127,978. 
WASHINGTON. 
The  copper  product  of  Washington  comes  chiefly  from  the  mines  situated  in  the  eastern 
part  of  the  State,  though  numerous  prospects  exist  in  the  Lake  Chelan  region  and  in  the 
Cascade  Mountains  near  Index  station,  on  the  Great  Northern  Railway. 
The  production  for  1904,  by  counties,  is  as  follows: 
Production  of  copper  in  Washington,  1904,  by  counties. 
County. 
Pounds. 
Value. 
77,548 
329 
77,850 
194, 320 
$8,948 
4G 
8,991 
25, 803 
350, 047 
43, 788 
The  Copper  King  mine,  a  property  situated  4  to  5  miles  from  Chewelah,  Stevens  County, 
is  shipping  ore  to  the  Northport. smelter.  The  ore  consists  of  chalcopyrite  and  is  said  in 
occur  in  a  schistose  rock  with  granite  near  by.  The  ore  is  hauled  to  the  railroad  by  a  trac- 
tion engine,  which  draws  six  cars  of  10  tons  each  and  makes  three  trips  every  two  days. 
At  Chesaw,  Ferry  County,  near  the  boundary  line,  northwest  of  Republic,  the  First 
Thought,  Orient,  and  Belcher  mines  have  been  developed  to  a  point  where  they  are  capable 
of  making  a  steady  output. 
The  Belcher  mine  was  actively  developed  in  1905.  The  ore  is  a  line-grained,  dense,  banded 
mixture  of  pyrite  and  chalcopyrite.  The  district  is  underlain  by  diorite«  and  syenite- 
porphyry.  The  ore  bodies  occur  in  east-west  fractures  in  the  diorite  with  northerly  dip. 
The  ere  occurs  both  in  nearly  pure  bodies  and  with  country  rock.  The  largest  shoot  in 
Belcher  No.  2  is  of  massive  pyrite  ore;  it  has  an  extreme  width  of  80  feet  and  is  100  feet  long. 
Pyrrhotite  is  abundant  in  some  veins  and  carries  low  gold  values.  The  Belcher  has  five 
tunnels  and  several  open  cuts. 
The  ores  at  Index,  Snohomish  County,  consist  of  granite  impregnated  with  bornite  and 
are  quite  siliceous,  so  that  they  can  be  treated  only  by  mixing  with  the  basic  ores  of  other 
localities,  the  mixture  of  ore  and  gangue  being  too  intimate  to  permit  of  cheap  concent  rat  ion 
by  water. 
WYOMING. 
The  principal  copper-producing  section  of  Wyoming  is  the  Encampment  district,  which 
lies  in  the  southern  part  of  the  State  and  extends  from  the  Colorado  boundary  northward, 
on  both  sides  of  Platte  River.     Most  of  it  is  in  southern  Carbon  County,  and  the  remainder 
a  Mining  World,  Jan.  y,  1904,  p.  86. 
