l.EITII.] 
IRON    ORES    IN    SOUTHERN    UTAH. 
Average  analyses  of  ore  from  37  claims. 
233 
Iron,  metallic 
Phosphorus. . 
Sulphur 
Range. 
Per  cent. 
48.  32    to  69.  50 
.  009  to      .  478 
.  018  to      .  024 
Average. 
Per  cent. 
58.96 
.141 
.020 
A  fuller  analysis  by  Lerch  Brothers  of  all  samples  from  the  shafts 
on  the  Pinto,  Blackhawk,  and  Mountain  Lion  groups,  with  the  excep- 
tion of  the  top  30  feet  from  the  Pinto  shaft,  respresenting  a  total 
depth  of  291  feet,  is  as  follows: 
Average  analysis  of  ore  from.  Pinto,  Blackhawk,  and  Mountain  Lion  groups,  Utah. 
Per  cent. 
Iron,  metallic 56.  48 
Phosphorus 136 
Sulphur 039 
Manganese 27 
Silica 9.  67 
Alumina 1.  08 
Lime 1.  81 
Magnesia 1.12 
Loss  by  ignition > 3.  02 
Moisture 4.  00 
An  analysis  by  Lerch  Brothers  of  a  sample  from  the  magnetic  ore 
outcrops  of  17  claims  is  as  follows: 
Average  analysis  of  magnetic  ore  from  17  claims. 
Per  cent. 
Iron 64.  71 
.     Phosphorus 174 
Manganese 23 
Silica 5.  65 
Alumina 88 
Lime 1.  02 
Magnesia 80 
Sulphur 020 
It  is  apparent  that  a  considerable  proportion  of  ore  is  of  good 
grade,  though  for  the  most  part  non-Bessemer,  but  it  remains  to  be 
determined  by  further  underground  work  just  what  the  proportion  is. 
The  quartz  so  abundantly  present  in  cavities  in  the  ore  rapidly  lowers 
the  grade. 
Quantity  of  ore. — While  there  is  a  large  amount  of  iron  ore  appear- 
ing in  the  exposed  ledges  and  uncovered  in  pits,  it  is  difficult  to  make 
quantitative  estimates  of  the  tonnage  of  ore  of  present  commercial 
grade  because  of  the  variable  composition  of  the  ore  above  noted,  and 
further  because  insufficient  underground  exploration  has  been  done  to 
