Arizona republican., 1911-02-18

tains seams of rich OXidiZed ore, and
shades into disseminated ore in depth.
Below this Gaping of oxidized mater
! ial is the ore body proper, constituting
| the zone of secondary enrichment
| The copper occurs here as glance
| (chalcocite) associated with pyrite
Chalcopyrite occurs very rarely and
no bornite occurs save as films on
pyrite.
There is as a rule a sharp definition
between oxidized ore and the zone of
secondary glance ore. but tongues of
oxidation extend downward into
glance ore. In the Madeline Cray
CentraD shaft, this change to sulphide
ore is not sharp as elsewhere. and the
ore for some distance above the 200
foot Level, consists of about half glance
and half suprite. with some native
and some carbonate.
Beneath this ZoIe IF secondary en-
rishment lies the zone Of primary sui
phides. The passage is gradual. but
occurs within 80 feet or so. with var
ious stages of secondary enrichment in
this distance. Tha primary ore con-
sists of pyrite. with accessory chalco-
pyrite. and occasionally moIybdenite
milled. concentrate into /. and the
resulting product carries IL per cent
copper The primary schist ore carries
less than l per cent copper The rocks
of this zone lack the alteration due to
acid waters. and show a dependence
of sulphides upon quartz, or at least
silica impregnation and veinlets
This ore body forms great blanket
in Fh.a aWN.W l..le =
varies from 90 to about 800 feet. and
over large areas will average so. In
cross-section it shows shallow basins
and rounded expansions. In the Ma
thias and Hall claims drill holes show
a Gaping of Oxidized ore. which | am
told was lis feet thick. Beneath this
pay ore extends down to a depth of 695
feet. and the big ore body of the de-
post lies in these and the Sharkey
claim Of the Ray Con- Co.
The faulting of the district. which is
Tertiary. is according to DIR. Weed. in
timately connected with the ore bodies
If the secondary enrichment making
workable ore bodies is earlier than the
dacite. the land east of Mineral Creek
Is valuable: il enrichment is later, it is
not. according to the doctor.
Copper Situation
1t seems almost impossible To ever
he able to receive report of the Cop
per Producers Association without a
thoTn beng concealed in it some
where.
The figures submitted last week
show tfat during January the pro-
duction Of new metal fell to 115.OOO.-
900 POUNDS, a drop of over 1000. 900
pounds from the output of the mines
in December. IN the other hand
this favorable factor of lower out
put. Which most of the big produe-
ers have becn striving to attain from
r' nth 20 month under a curtailment
plan. shrunk into insignifieance when
IL appeared that consumption during
Re mn; III had fallen off perceptibly
and that the surplus reserves of cop
per had increased over 2O.00O.000
pounds during the month. bringing
the total reserve of stocks on hand
up to ZAP .00O,O 900 pounds This is
the first time in many months that
an Increase i'm the reserve has been
shown, heretofore the returns from
month to month having shown de-
crease of from 10000 TO 100000
pounds per month.
This amount i'm the reserves was
caused almost entirely by the fact that
shipments both abroad and the sale to
manufacturers fell off perceptibly
from the December figures.
However. IL the output of new metal
could now be kept at 112.000.0OO
pounds per MONTH one of the big i'm
,provements of the>situation will have
been registered. as it is only ones
ton of a short time before business
will pick up radically. and then the
amount that will go into the trade
every month will be far in excess
of 100000 pounds, In this fash
ion big hole will be cut into the
reserves Immediately and permanent
improvement in the metal shown.
Ore Shipment.
The first car load of ore by the
Summit Mining company. consisting
of 40 tons of % per cent ore was
shipped to the FL Paso smelter Sat
urday. says the Globe Silver Belt A
carload of this ore viii net from 1000
to $1,000.
Twenty five tons OF high grade ore