El Paso herald. (El Paso, Tex.) 1901-1931, 1912-07-18

GRANTEES and porphyries and garnet
and metamOrphic limestOnes.
OccurreAce of Ore Deposits.
The ore deposits in the Quitman
mountains are of four kinds: fisSure
and contact-fissure veins in igneOus
rocks, bearing lead, zinc and silver and
gold; contact tamOrph1c deposits OF
copper ores carrying gold; assures in
mctamOrphic HmeStoneS carrying sill
yer and copper silicates and oxides; re-
placements deposits in limestone, near
contact with intrusive pOrphyries, car
rying lead or zinc carbonates and lead
and gold.
The Bonanza lode is contact fis-
sure, accompanying a quartz porphyry
dixie which cuts through the Quitman
range from east to west. The Little
Lightning group and the recently dis
covered Red Indian claim are 1lluStra-
lions of the contact metamOrphic de-
pOsitS The Tama is a flSSure cutting
metamOrDhic. silicified lime, the Bar
post in limestone, and the Hunter is
a gOld-lead deposit in contact of lime
and pOrphyry.
Outcrops of Ore Deposits.
In the Bonanza and Aeroplane fissure
vein the outcrOps are composed of iron
silicateS and oxides showing traces Of
lead, silver and copper Below in the
workings the lead and silver increases
rapidly. At greater depth zinc car
Donates appear. Deeper down below
the zone of oxidation zinc and lead
sulphides come in
The Outcrops of the contact-meta-
morpEic deposits of copper, as found
in the Little Lightning group and the
Red Indian Copper, are black and red
oxides carbOnateS and SilicateS OF cop
per and copper stained garnets. In
general the ore is found on the con-
tact of the biolite- granite orphyry
and the garnet or marble. Parts of
an ore body may be several feet away
from the intrusive rock, but some pOr-
rT "a oil
contact OF the igneous rock.
The unaltered copper ore bodies be-
low the zone of oXidization consist
chiefly of pyrites, cupriferous pyrite
and chalcopyrite and occasional chal-
coeites, IN gangue of garnet quartz.
The zone or belt of the contact
metamOrphic copper deposits extend
irreguIarly along the southwestern
base Of the main ridge at least a mile,
and probably traced much farther. This
copper belt is said to bear close geo
logical resemblance to that more IA
nous copper belt in the Silverbelt dis
trict, Arizona. The Quitman cOppers
all carry gold all the way from 81
to $50 per ton, and few ounces in sill
yer, in this respect resembling the
ores of the Lordsburg, N. NJ, district
Leading Mines and Prospects.
The Bonanza mine is on the eastern
slope and foothills Of the main ridge Of
the Quitman mountains. The property
COVERS a SGGLlOn OA pdlcuLGu ldLlu puI-
chased from the Texas & Pacific rail-
road.
1t was originally discovered in 1884
by T. R owen and George F. Miller
and was worked by them and by Jacob
Hand to so feet depth, and a drift
run 43 feet, from which some stopping
was done, and shipments were made to
the Kansas City shelters, of ore aver
aging $40 in lead and silver. These
ores were lead carbOnates with punches
of galena-
Then Col. Bush Stevenson, of Ell
Paso, bought the property, and work ed
il from 1885 for several years, sinking
a workshaft 252 feet deep. hosting
with within and doing a great deal of
drifting and stopping. He shipped a
large amount of lead-silver ore run
ming 40 to so ounces silver and 40 to
65 percent lead. Meanwhile as depth
was attained, and the unoXidized zone
was reached, bodies of sphalerite or
zinc blende came in. At that early
date. western zinc ores had no avail