The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1910-08-11
ORE IN MONTANA MAMMOTH
High Grade Recently Exposed. Favor.
able Report by Washington Expert.

Assays ore from the Montana Mammoth Mining companys
property being developed give returns to $4,000 ton
and will well $50 90 to the ton report recently
made by Professor Francis Thompson head of the engineering
department at the Washington State College, Pullman would be
considered exceedingly good property and is learned
that since his inspection made weeks ago. development
has exposed some really high grade
Mr. Thompson The entire embraced by prop
ery covered for thousands Of feet with bedded quartte
which corresponds almost exactly with the Reve quartzte in
which large proportion of the productive Occur Aene
mines To the eastward there evidence of dixie Of ampro
phyre and westward large dixie of birdeye pophyy
light yellow color undoubtedly the monzone nrusons
SO common across the Idaho line.
These facts taken together make combination decidedly
vorab for the Of lead large quantities.
From the formations included in the Raval which predomn
aes have SO cent of the immense Occur dAne pro-
dcon and these bodies undoubtedly connected origin
with the monzopite intrusions
bodies discovered the property are would
naturally expect from duplication of the Aene cond
tons mneraogicay identical with the found in that dis
rct the country rock qua having been replaced by spa
iron and this in turn by gaena with py sphaerte chalco
|pyrite, limonte etc. associate minerals.
Commercially the opened by the older workings the
northern end Of the property is unimporant but these workings
show that the naturalization extensive and continuous
THE exposed about half mile the southwark from
s however decidedly promising and could hardly hope
better surface showing anywhere
THE improvements the property consist several dwell
ings Office boarding house ETC. Ample timber for all
mining purposes is on the ground
The workings have been confined mainly the exposure at
three adits the level higher up the hill to-.
ng together 500 600 feet have been driven with
ea small side drifts and At the mouth of twin
shaft has been sunk about 40 feet Above the tunnels
number of cuts and trenches all of which show
II would suggest the opening of the body exposed
south end stripping off the surface and cutting along the
face Of the hill to determine the general Of the lode After
has been done follow the gaena underground as it is likely
to lead to large ore bodies.
my conclusions regarding property decidedly
able The geological conditions appear be practically identical
with those in the neghbohood Of the largest producers
Occur dAlene district consider this property has good
chance of making producing mine Further development
any justified and strongly advise prosecute your work
on the Montana Mammoth as vigorously possible"
In addition the report the results Of assays submit
d The taken from the open cuts tunnels Dumps
These showed maximum Of 08 Of god 32
1873 cent lead 92 4 zinc and
49, per cent on Since then gaena of high grade has been
posed and shipments could be made by sorting the Mr.
Mitchell the ground personally experimenting the work.