The Helena independent. [volume] (Helena, Mont.) 1875-1943, 1893-05-04
water gases will arise into vertical lines |
from below md naturally their limiting
plane will be tbs hanging wall.

water case. will aris: Into vertical lines
plnns will be tbs hanging wall.
On ths hanging wnsi You will AMI =
largo amount of rsVlncemrnt. and hence
more selvAgs on that portion OF the wall
than sou will md on the foot wnii. That.
together with tho motion Of this wall. has
forced quite . large clay ~aslvsge and
orsccis. and the grinding movement has
been 30 great that son find II would appear.
without annlyzing carefully. the lode has
apparently another wall. although II you
take a good Wow Of this and take into con
stderation the tlnInsnss size Of the ore
tsnablo for a momen The amount OF
clay selvege on ths foot wall 10 much less
than OH the hanging wall. Tho movement.
however, that 10 tho at ietions n corroga-
tions seem to be In some places euon heav-
ier thar they arc in tho hanging wall, but
this ia not. think. anything to be
surprised Mt. II IL rather in favor Of tho
foot wall II 1t wee not for the fnot that
there Ia not quite 80 much clay solvege.
Through the 2 A level, the thirty foot level
drivsn by tho st. Louis company, aud the
400 and 600 foot levels we notice hat this
clay Ia very thick, and In the barron por-
tiona Of the lode there appears vein ma
terial with slate bands In It; there Appea,s
to have been IN extra henvy pressure. and
In places II appears to be horizontal, but
these situations In the talo are simply
pressure lines, and they do not correspond
to the strike. find this the same on the
talc Of tho foot wall. In the 400 foot level
We 6nd north Of shaft No. 2. or between
shafts W. md one the foot wall exposed.
] don't mean the foot wall country. because
the wall there lie In %Ilnces not very hard
and IL IL quite possible that tho ultimate
foot wall or the real foot wall OF the coun-
try 10 back two or three feet from that.
hT1k fnR Snn0k ~ Aknk I{utnUAo IN
have exposed what Is really the
foot wall. We SEQ that seam
again IN the other side and through that
PORTION of tho min VI see the cor oRations
40 we'll represented rs We do In the thirty
foot level as 1t Appears in the st. Lonis
- wedo on tho thirty-foot level Of the st.
Louis vein.
"Those are tho general features of the
vein SO far az the naturalization of il is
concerned, and the condition of the filings
and the hanging wall and the clay seLveRs.
SO far as the component parts OF the bar
rem portion ia concerned We find IL to con-
s,st Of the clay sslvees on the hanging aud
foot wall. and nsar that 10 brecciated ma
terial moro or less changed. and by this
change l mean shat through q considera-
BILE portion Of the lead IL has been
cementcd together by %ground.up matrix
and Other mineral solutions which result
from chemical change Of the rock OF vein
filling rather than between the foot and
hanging walls. and in the center We find very
frequently some bnrren pieces of quartz,
and in places we find Whit appears to be
ba rem country rock. it is massive in ap-
pearanoe a. q rule when it ia found, but II
lacks go far as my observation is concerned
almost invariably the cleavage plane of the
country rock. l have head it called CO.
ment. II has been remineralized. 1t con-
tains a high percentage Of ohalybeats and
might be called cement"
Prof. Churchill Was oross-examiaed dur
ing the afternoon and will be on the stand
again to-day.