The Anaconda standard., 1899-09-14

Then, as far as you know, there has
been no vertical displacement at alp
Il have not been able to tell whether
there was or not"
Then, such displacement rs you have
| spoken of has been horizontal dis
| placement"
Yes; so far as I know"
You described the movement and the
| displacement, as shown by bodies Of
| porphyry on the 50-foot level, yesterday
| What is that displacement"
| The so level map was pulled down
from the roller and the witness pointed
| out, marked the boundaries and gave
the distance between two bodies of por-
| phyry, one east Of the east fault and
one west of the west fault, represented
on the map by oblong figures in yellow
| paint. The western body is 100 feet
north of the eastern body, the witness
said. He could not say that the walls
of the eastern body were to be seen
in the workings, though the limits of
the porphyry were definitely marked
upon the map.
The western and northerly body of
porphyry shows on the line or wall OF
the west fault only for distance of
four or five feet north and south, though
the yellow figure on the map gives it a
width of 40 or so feet.
The witness admitted that granite in
tervenes between the north part of the
area of four or five feet and the clay
seam known as the west fault. The
southern part of the area only is flush
with the clay.
He also admitted that the yellow fig
ure represented greater width of por-
phyry north and south by Is feet than
is actually developed.
The clay slip or seam in the fault was
formed at the time of the fauting by
1n rt,h of
country rock on either side. The wit
ness could not say that the clay came
from the granite or the porphyry.
The witness said that the two bodies
of porphyry had been united, before
the fauting, in one dyke, and had been
separated 100 feet by the displacement,
which moved the west body that far
north of the other
Then, you say that when the move
ment stopped, you had two inches of
clay between the blocks?" asked .Ar.
Hughes.
Yes" said the witness.
rs there any other place in the
ground or workings where you can
measure the displacement"
NO"
Then parts of whatever was on the
line of displacement on the same level
will now be found $50 or 100 feet apart,
north and south?"
Yes; if there was no rotary move
ment, like the opening of a pair of
shears, and no vertical movement, the
displacement should be shown exactly"
The witness did not know whether
there had been any rotary movement or
not, but was inclined to believe there
was. He said that the assumption was
favored by the fact that the bodies of
porphyry on some levels of the ground
are less than $50 feet apart. He ad-
mitted, however, that this sign is un-
reliable, since bodies and dykes of por-
phyry occur irregularly and eccen-
trically.
Pressed for an answer as to whether
a clay seam two inches wide destroys
the identity of a vein by passing
through it, and makes it two different
identities on the different sides of the
seam, the witness said that it does.
On the so level map a vein was traced
up to the east fault from the east, and
another vein was traced up to the west
fault from the west at a point opposite
the first, and the witness was asked If
he could not identify the two veins as
parts of one vein before the faulting
He said he could not. He said the
strikes of the veins We're different, but
admitted that the strike of vein may
change without affecting it's identity.