The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1884-01-01

rent aSsuDCer, one part being ralseo
up and tilted back by powerful vol
cauic sgeDcies, thus forming the
, mountain. its eastern face presenting
a cross section OF those strata u thou
sand feet thick. aIe now dipping
westward into the mountain st az
angle of about tween y degrees below
the borizsntal. That portion OF the
formation from which this mountain
was dets ched. either remsins 10 it;
original horizontal position or sank
down and was subsequently, covered
with the tr4cbyts that flowed over it,
and against the eastern base OF the
granite mountain and the eastern ard
southern base OF the Gram plan noun.
tain, and now forms sort OF undu.
lating plain extending several miles
eastward. The euarizite and d0lo
mites are in contact with the granite
on the north, on line running
nearly east and west, and also III con
tact with the traohyse on the east,
and south eide of the m0u ntsiD.
The mines are in this latter contact
at the EASTERN ba e Of the Grsmpiau
mou tain. the footvsll being massive
layers OF quar,zite and dolomite. and
the hanging tracbite and in the cen
ter of great mineral bsit or district.
The veins or lodes are distinctly
traceable on the surface along the
entire eastern base of the Grampiaa
mountain to the granite on the north.
distance Of about q mile and half,
the course OF the lodes being north
10 degrees west, and south 10 degrees
eest by the magnetic needle The
mines are at the very centre or focus
OF this great upheaval where all the
geological evidence points to its COZ
tipuanoe down TO the deep. The
town of Frisco, a mile to the east
ward of the mire s, is built en- an ex-
tinct crater filled With volcanic ashes
and tufs. II is evident that this
crater was once the vent throu b
which the volca ole forces came direct
ly to the surface from below through
the great fssure made by the break
in the limestone and quartzite; this
assure. following the contact with the
trachyte, forms the lode
The principal mine are the Horn
Silver which is the original location
on the main lode having sever ex-
tensions north and south; Carbonate,
Cave, Comet. Morrison. New Haven,
Cactus. Magnolia, Samaris, Tails
man. Stewart, Silgeropolis, Ross,
Bradshaw. Wooloett, Dexter, Cyprus,
Mammoth, Grampiap, Jay Hawker,
Sherman. Florida, Lulu, Dolly
Mack, Triangle, Antwerp, Wander
bilt. Governor, Yellow Jacket, Rat
tier. Dives, Summit, Hoodoo, Ameri-
Gus, Massachusetts,. Quartzite, Mia.
CARA, Morning Star, Hope, Colburp,
Great Republic and Young America.
As it would take too much space
and time to describe all of the above
mines, l will therefore here confine
myself to few, the leader Of which
is the Horn Silver.
The vein is traceable for several
miles. from the southeastern end OF
the Grampian mountain to the point
where the doiomite gives place to
granite. The width of the vein at
the Horn Silver discovery is from forty
to sixty feet, showing galena in places
all throughout the length of the
claim. The vein dips north 60 de
grees magnetic at an angle of incli-
nation of about 20 degrees from the
horizontal The foo wall OF the lode
consists of qusrtZ.te and limestone
and the hanging wall of partially
decomposed trachytic material.
From those facts it will readily be
seen that the dip and strike must
vary at points; especially there, where
the softer parasitic dolomite-are
more readily decomposed and eroded.
than the qusrtzite. Therefore the
width of the lode varies in places.
Both walls are covered with a dry
ferruginous clay which serves as an
indicator of, and guide to, the lode
and the walls thereof. The hanging
wall OF said lode has been penetrated
for 8 distance OF 200 feet o. more.
The following material is thereby dis
closed: Adjoining the ore. 20 to 25
feet of clay stained with oxide of
iron, then 80 feet OF tough Glue clay
merging gradually into decomposed
trachytic mass Of a reddish gray
color. The lode Itself contains in its
enormous vein fssure, two general
classes of material; the larger por.
ton is what is termed smelting ere;
this is soft and earthly. consisting of
oxide and carbonate of
lead, carrying silver. The smaller
portion is heavy spar (sulphate Of
baryta) carrying chloride. of oliver,
sulphste OF sil1er and ruby silver.
The sparry ore is found on the side of
the hanging wall in the upper part
CT the vein, and has resisted decom.
position on ccount OF its position in
the ID and on sccouuto OF the refrae-
tory nature OF the material compos'
ing this kind of ore. All the other
ore of this immense deposit has un-
dergone oxidation and other changes.
There ia no doubt but, as depth is
gained, the ore will be found in lts
original condition, that is, in the
form of suphurets. Remarkable is
tho ahsenca of wall Material so.