Amador ledger., 1901-03-22
MINING BULLETIN OF ". 4. STORMS
MOTHER LODE REGION OF CALI
FORNIA.
Particular Attention Has Been Given to
the Gold Mines of Amador
County.
FREMONT MINE.

FREMONT MINE.
This property, p miles north of
Amador City, comprises the Fremont,
Cover, and Loyal Lode, 1920 feet on
the lode. The principal work on this
property is on the Cover Mine, the
main shaft of which is down 1900 feet
on an incline, being 1850 feet vertical.
There are ten levels, and in the lower
levels of the mine there are developed
large masses of low-grade quartz. In
the early part of the present year, a
new shaft was started on the Fremont
claim. This is an inclined shaft, sunk
at an angle of 81 degrees below the
horizon. 1t is started in the hanging
wall of the vein, which it is calculated
to intersect in depth.
CENTENNIAL MINE.
This property is II miles northeast
of DrytOwn. An inclined shaft has
been sunk sos feet, and sinking was in
progress in April last. The shaft,
started on the vein, passes into the
foOt-wall, and cross-cuts are run to the
vein at the $50, $50 and $50 levels.
On the first the vein was found from 3
to 8 feet wide; on the second, Is feet;
and on the third, about 2 feet. The
shaft will be continued to a depth of
1000 feet. The formation is greensboro
schist (after diorite)
PLYMOUTH CONSOLIDATED MINE.
This property is at Plymouth. and
has been idle for many years, but
within the past year the old dumps
have been worked with profit by
Huntington mills. These dumps were
estimated to contain over $50, 900 tons
of rock. The reduction plant consists
OF four 5-foot Huntington mills with
hydraulic sizers, Wiley and Wood
bury concentrators, and canvas plant.
Power is furnished by water from the
Hayward ditch under a head of 572
feet. The dumps were moved at very
low cost by cutting in at their base and
running an open cut directly into the
end of the pile of rock. When a face
of sufficient size had been exposed, a
movable chute was placed against the
face, by means of which all the rock
above the level of the chute was easily
delivered to cars beneath the chute.
The rock was trammed to the mill,
hoisted into the car by means of a
hydraulic elevator, dumped onto the
grizzlies, from which it passed to the
rock breakers, falling into bin. From
the bin, the rock was delivered to
automatic feeders, thence to the mills
X X
PoCAHONTAS MINE.
This property is II miles east of Dry
town, and includes the Pocahontas,
Edison and California, the owners hold :
ing bond on the Maryland claim ad-
jacent. A vertical shaft has been sunk
on the Pocahontas to the depth of $40
feet, with six levels. The formation is
practically a black tufaceous, pitted
slate, to the west of which lie the
Mariposa clay states. Over 1000 feet of
cross-cuts have been run, extending
from the Mariposa states on the west
to massive diabase on the east.
PIONEER MINE.
1t is l mile south of Plymouth, and
comprises mile on the lode, which
consists of two veins; the east or hang
ing-wall vein of massive quartz, and
the west vein banded structure. The
latter is usually the better vein. These
veins occur in the black tufaceous
states. An inclined shaft has been
sunk 500 feet on the foot-wall vein, and
in the several levels three shoots of ore
have been developed. In some re-
spects these shoots of ore are similar
to those of the Central Eureka at SUIT
ter Creek. The lower workings of the
mine, however, are in low-grade ore,
and appear to have reached zone of
little or no pay rock, which seems to
be peculiar characteristic of many of
the most important mines of Amador
County. GeOlogically, the outlook for
the future of the Pioneer Mine NAV be
considered as encouraging, as there is
no reason to anticipate that it may not
at greater depth repeat the experience
of the Kennedy and Argonaut, Central
Eureka, and other mines in this county.
PHILADELPHIA MINE.
1t is miles north of Plymouth, near
the Bay State. Several years ago this
mine was opened by means of large
cut and drift, when operations we're
suspended, and the mine remained idle
until the spring of 1900, when a new
double-cOmpartment shaft was started
1000 feet south of the old open cut.
This shaft had reached depth of 80
feet early in June. It's hanging-wall is
diabase; the foot-wall is black slate.
The vein formation is 20 feet in width.
There are kidneys of good rock on the
foot-wall side. The shaft is equipped
with water-power hoist, capable of
going 1000 feet.
IvANHoE MINE.
1t is > miles northeast of Plymouth.
The mine occurs in zone of amphi-
bolite schist, and is developed by a
vertical shaft 100 feet deep, and also by
an inclined shaft 100 feet. 1t has 20
stamp mill and a steam hoist. 1t has
been described in former reports, and
was closed down in the spring. of 1900.
SHENANDOAH MINE.
1t is II miles northeasterly from
Plymouth. This interesting vein ad-
joins the Red Cloud, described in form
er reports, on the south. The forma-
ton is diorite, which, near the vein, is
altered to amphibolite schist. The
shaft, early in May, had reached a
depth of 375 feet, partly on the vein,
but the lower portion in the foot-wall.
Drifts were run at the 200 and 375
levels, the latter from cross-cut.
There are two veins in this assure, one
a massive vein of quartz, the other a
banded or ribbon vein. On the south
side of the shaft the banded vein lies on