Alcoa 2013 Annual Report Download - page 23

The following table provides additional information regarding the Company’s bauxite mines:
Mine & Location
Means of
Access Operator
Title,
Lease or
Options History
Type of
Mine
Mineralization
Style Power Source
Facilities,
Use &
Condition
Australia—Darling
Range; Huntly and
Willowdale.
Mine locations
accessed by roads.
Ore is transported
to refineries by
long distance
conveyor and rail.
Alcoa Mining Lease from
the Western Australia
Government.
ML1SA. Expires in
2024.
Mining began in
1963. Open-cut mines. Bauxite is derived
from the weathering
of Archean granites
and gneisses and
Precambrian
dolerite.
Electrical
energy from
natural gas is
supplied by
the refinery.
Infrastructure includes buildings
for administration and services;
workshops; power distribution;
water supply; crushers; long
distance conveyors.
Mines and facilities are
operating.
Brazil—Poços de
Caldas. Closest town
is Poços de Caldas,
MG, Brazil.
Mine locations are
accessed by road.
Ore transport to
the refinery is by
road.
Alcoa Mining licenses from
the Government of
Brazil and Minas
Gerais. Company
claims and third-party
leases. Expire in
2020.
Mining began in
1965. Open-cut mines. Bauxite derived
from the weathering
of nepheline syenite
and phonolite.
Commercial
grid power. Mining offices and services are located at the refinery.
Numerous small deposits are
mined by contract miners and
the ore is trucked to either the
refinery stockpile or
intermediate stockpile area.
Mines and facilities are
operating.
Brazil—Juruti
Closest town is Juruti
located on the
Amazon River.
The mine’s port at
Juruti is located
on the Amazon
River and
accessed by ship.
Ore is transported
from the mine site
to the port by
Company owned
rail.
Alcoa Mining licenses from
the Government of
Brazil and Pará.
Mining rights do not
have a legal
expiration date. See
footnote 4 to the table
above.
The operating
license’s next renewal
date is in 2014.
The Juruti deposit
was systematically
evaluated by
Reynolds Metals
Company
beginning in 1974.
Alcoa merged
Reynolds into the
Company in 2000.
Alcoa then
executed a due
diligence program
and expanded the
exploration area.
Mining began in
2009.
Open-cut mines.
Bauxite derived
from weathering
during the Tertiary
of Cretaceous fine
to medium grained
feldspathic
sandstones.
The deposits are
covered by the
Belterra clays.
Electrical
energy from
fuel oil is
generated at
the mine site.
Commercial
grid power at
the port.
At the mine site: Fixed plant
facilities for crushing and
washing the ore; mine services
offices and workshops; power
generation; water supply;
stockpiles; rail sidings.
At the port: Mine and rail
administrative offices and
services; port control facilities
with stockpiles and ship loader.
Mine and port facilities are
operating.
Jamaica—Harmon’s
Valley, South
Manchester, Porus/
Victoria Town. All
located in the Parish
of Manchester.
The mines are
accessed by road.
Ore is transported
to the refinery by
Company rail.
The refinery is
located near
Halse Hall,
Clarendon Parish.
Alcoa Mining licenses from
the Government of
Jamaica.
Expire 2031.
Mining began
in 1963. Open-cut mines. The karst landscape
from the White
Limestone
Formation of
Eocene to Miocene
age hosts the quasi-
funnel shaped
bauxite deposits
which are residual
from the weathering
of volcanic and
terrestrial materials.
Commercial
grid power. Numerous small to large deposits are mined within the
license areas by contract miners
and delivered to stockpile areas.
The main mine administrative
offices and services are located
near San Jago. Ore is delivered
to San Jago by truck and by
Ropecon conveyor. The train
loadout area is at San Jago.
Mine, railroad and other
facilities are operating.
Suriname—
Coermotibo and
Onverdacht. Mines
are located in the
districts of Para and
Marowijne.
The mines are
accessed by road.
Ore is delivered to
the refinery by
road from the
Onverdacht area
and by river barge
from the
Coermotibo area.
Alcoa Brokopondo
Concession from the
Government of
Suriname.
Concessions formerly
owned by a BHP
Billiton (BHP)
subsidiary that was a
45% joint venture
partner in the
Surinamese bauxite
mining and alumina
refining joint
ventures. AWA LLC
acquired that
subsidiary in 2009.
After the acquisition
of the subsidiary, its
name was changed to
N.V. Alcoa Minerals
of Suriname.
Expires in 2033.
Alcoa began
mining in
Suriname in 1916.
The Brokopondo
Agreement was
signed in 1958.
As noted, Suralco
bought the bauxite
and alumina
interests of a BHP
subsidiary from
BHP in 2009.
Open-cut mines.
For some mines the
overburden is
dredged and mining
progresses with
conventional open-
cut methods.The
protoliths of the
bauxite have been
completely
weathered.The
bauxite deposits are
mostly derived
from the weathering
of Tertiary
Paleogene arkosic
sediments. In a few
spots the bauxite
overlies
Precambrian
granitic and
gneissic rocks
which are now
saprolite.
Bauxitization likely
occurred during the
middle to late
Eocene Age.
Commercial
grid power. In the Onverdacht mining areas the bauxite is mined and
transported to the refinery by
truck. In the Coermotibo mining
areas the bauxite is mined and
stockpiled and then transported
to the refinery by barge. Some of
the ore is washed in a small
beneficiation plant located in the
Coermotibo area.The main
mining administrative offices
and services and workshops and
laboratory are located at the
refinery in Paranam.The ore is
crushed at Paranam.
The mines and washing plant are
operating.
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