Alcoa 2012 Annual Report Download - page 21

Mine & Location
Means of
Access Operator
Title,
Lease or
Options History
Type of
Mine
Mineralization
Style Power Source
Facilities,
Use &
Condition
Brazil—MRN
Closest town
is Trombetas in the
State of Pará, Brazil.
The mine and
port areas are
connected by
sealed road
and company
owned rail.
Washed ore is
transported to
Porto Trombetas
by rail.
Trombetas
is accessed by
river and by
air at the airport.
MRN Mining rights and
licenses from the
Government of Brazil.
Concession rights
expire in 2046.
Mining began
in 1979.
Major expansion in
2003.
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.
MRN
generates
its own
electricity
from fuel
oil.
Ore is mined from several
plateaus crushed and transported
to the washing plant by long
distance conveyors.
The washing plant is located in
the mining zone.
Washed ore is transported to the
port area by company owned and
operated rail.
At Porto Trombetas the ore is
loaded onto customer ships
berthed in the Trombetas River.
Some ore is dried and the drying
facilities are located in the port
area.
Mine planning and services;
mining equipment workshops are
located in the mine zone.
The main administrative, rail and
port control offices and various
workshops are located in the port
area.
MRN’s main housing facilities,
‘the city’, are located near the
port.
The mines, port and all facilities
are operating.
Guinea—CBG
Closest town to the
mine is Sangaredi.
Closest town to the
port is Kamsar. The
CBG Lease is
located within the
Boké, Telimele and
Gaoual
administrative
regions.
The mine and
port areas are
connected by
sealed road and
company operated
rail. Ore is
transported to the
port at Kamsar by
rail. There are air
strips near both the
mine and port.
These are not
operated by the
company.
CBG CBG Lease expires in
2038.The lease is
renewable in 25 year
increments.CBG’s
rights are specified
within the Basic
Agreement and
Amendment 1 to the
Basic Agreement with
the Government of
Guinea.
Construction began
in 1973.
First export ore
shipment was in
1973.
Open-cut mines.
The bauxite deposits
within the CBG
lease are of two
general types.TYPE
1: In-situ laterization
of Ordovician and
Devonian plateau
sediments locally
intruded by dolerite
dikes and sills.
TYPE. 2: Sangaredi
type deposits are
derived from clastic
deposition of
material eroded from
the Type 1 laterite
deposits and
possibly some of the
proliths from the
TYPE 1 plateaus
deposits.
The
company
generates
its own
electricity
from fuel
oil at both
Kamsar and
Sangaredi.
Mine offices, workshops, power
generation and water supply for
the mine and company mine city
are located at Sangaredi.
The main administrative offices,
port control, railroad control,
workshops, power generation
and water supply are located in
Kamsar. Ore is crushed, dried
and exported from Kamsar. CBG
has company cities within both
Kamsar and Sangaredi.
The mines, railroad, driers, port
and other facilities are operating.
Kingdom of Saudi
Arabia—Al Ba’itha
Mine. Qibah is the
closest regional
centre to the mine,
located in the
Qassim province.
The mine and
refinery are
connected by road
and rail. Ore will
be transported to
the refinery at Ras
Al Khair by rail.
Ma’aden
Bauxite &
Alumina
Company
The current mining
lease will expire in
2037.
The initial
discovery and
delineation of
bauxite resources
was carried out
between 1979 and
1984.
The southern zone
of the Az Zabirah
deposit was granted
to Ma’aden in 1999.
Currently the mine
is in development.
Production is to
begin in 2014.
Open-cut mine.
Bauxite occurs as a
paleolaterite profile
developed at an
angular
unconformity
between underlying
late Triassic to
early Cretaceous
sediments (parent
rock sequence
Biyadh Formation)
and the overlying
late Cretaceous
Wasia Formation
(overburden
sequence).
The
company
will
generate
electricity
at the mine
site from
fuel oil.
The mine will include fixed
plants for crushing and train
loading; workshops and ancillary
services; power plant; water
supply.
There will be a company village
with supporting facilities.
The mine is under construction.
Mining operations are to
commence in 2014.
Kingdom of Saudi Arabia Joint Venture
In December 2009, Alcoa and Saudi Arabian Mining Company (Ma’aden) entered into a joint venture to develop a fully integrated
aluminum complex in the Kingdom of Saudi Arabia. In its initial phases, the complex includes a bauxite mine with an initial
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