Mesa free press., 1899-09-22
TIMES AND MINING.

1ueTG dIe VGIuS VI ledu-SIltGE ore
and of dry silicious ore on Santa Cat
alma island off the coast Of California.
The lcad-slver veins were worked in
small way years ago by man named
Gardener. 1t is said some Of the ore
shipped from the veins at the isthmus
on the island assayed 500 per ton
There is also steatite of commercial
value on the island.
The new vertical shaft in the Gwin
mine has reached 1900 feet, and will
not leave the vein for some time. Rock
taken out in sinking was run through
the mill without sorting the vein mat
ter from that of the walls. 1t milled
SIS ton. AS the shaft is eight feet
wide and the vein two feet, but a
quarter of the rock milled was ore,
making the ore on milling test aver
age $40 ton.
The structural geology of the Cal
leo, San Bernardino county, region, is
not unlike that of Cripple Creek, sub
stituting rhyolite breccia for the ande-
site breccia of Cripple Creek and Ii
parte dykes and flows for the pheno-
lite. There are also later intrusions of
CLASSY rocks-vitrophyre and pearlite-
|
so far as known, are not associated
with any ore deposits.
A test crushing of 1876 tons Of ore
taken from the Central Eureka mine,
near Sutter creek, Aamador county,
made at the Zella mill, yielded $13,-
466.93 free gold. OF the rock crushed
146 tons were from the shaft, which is
down 1900 feet and 40 tons were from
other parts Of the mine. There are
four and one-half tons of sulphurets
which will yield 5000 to the ton. The
Central Eureka is south of the Eureka
or Hayward mine, and the character of
the rock is much the same.
The Providence mountains, north of
Fenner station, San Bernardino
county, were at one time the scene of
active mining operations when the
Bonanza King was the leading producer
OF the district, being a silver mine. In
more recent years, however, a number
of small but very rich gold veins have
been discovered at various points in
the range and near it, and this fact
leads to the belief that more thorough
research may result in the discovery of
valuable gold mines. The rocks of
the range include limestone, Quartzite
and schistose rock (metamorphics) and
numerous eruptive dykes.
The Randsburg Miner says that some
slight changes have been made in the
rates Of milling ore at the Barstow
mill. 1t was found that to mill low
grade ore at $1.25 per ton there was a
small actual loss, as the cost was few
cents more than that. The rates on
all ore running to $40 or less hereafter
will be $3.50 per ton and $1.25 for
freight, making a total of $2.75. The
company will also buy the concentrates
or permit the parties having the ore
milled to take them away, as they pre-
fer. If they. buy they will pay 95 per
cent Of the assay value, less freight and
smelling charges, which are about SIG
per ton.
Captain Farnsworth, one of the own
ers of the Dewey mine in the Grape
vine district, and which was bonded to
Denis Clark for $20O,O00 says that
work is stopped temporarily, but will
be started up again in the ner future.
II am sorry that man with Mr..
Clark's reputation did not become in
terested in this promising district"
said the Captain to San Diego Trib-
une reporter, "but just the same \the
gold is there and the district will yet
demonstrate the fact that the mines
are amongst the richest in the sta,e.
OF course, there is still hope that Mr.
Clark may take an interest in the dis
trict, but there are other good men
who will take hold Of these properties
before long. So far as the Dewey is
concerned, l am we'll satisfied to keep
it and work it unless I get the price
am convinced it is worth"