Note:
1 tonne of uranium = approximately 1.3 short tons
of uranium oxide;
US$ 1 per pound of uranium oxide = US$ 2.6 per kilogram
of uranium;
1 short ton U3O8 = 0.769 tU.
Proved reserves correspond to the NEA category
"Reasonably Assured Resources" (RAR), and refer to
recoverable uranium that occurs in known mineral deposits
of such size, grade and configuration that it could
be recovered within the stated production cost ranges
with currently proven mining and processing technology.
Estimates of tonnage and grade are based on specific
sample data and measurements of the deposits, together
with knowledge of deposit characteristics. Proved
reserves have a high assurance of existence.
Estimated additional amounts recoverable corresponds
to the NEA category "Estimated Additional Resources
- Category I" (EAR-I), and refers to recoverable uranium
(in addition to proved reserves) that is expected
to occur (mostly on the basis of direct geological
evidence) in extensions of well-explored deposits
and in deposits for which geological continuity has
been established, but where specific data and measurements
of the deposits and knowledge of their characteristics
are considered to be inadequate to classify the resource
as a proved reserve.
Such deposits can be delineated and the uranium subsequently
recovered, all within the stated production cost ranges.
Estimates of tonnage and grade are based primarily
on knowledge of the deposit characteristics as determined
in its best known parts or in similar deposits. Less
reliance can be placed on the estimates in this category
than on those for proved reserves.
Other amounts expected to be recoverable at up
to US$ 130/kgU refers to uranium in addition to
proved reserves and estimated additional amounts recoverable,
and corresponds to the sum of the two NEA categories,
"Estimated Additional Resources - Category II" (EAR-II)
and "Speculative Resources" (SR). This category includes
estimates of undiscovered uranium resources. These
may refer to deposits believed to exist in well-defined
geological trends or areas of mineralisation with
known deposits. Estimates of such deposits are on
the basis that they can be discovered, delineated
and the uranium subsequently recovered at up to US$
130/kgU. Estimates of tonnage and grade are based
primarily on the knowledge of the deposit characteristics
in known deposits within the respective trends or
areas and on such sampling, geological, geophysical
or geochemical evidence as may be available. They
include deposits that are thought to exist mostly
on the basis of indirect evidence and geological extrapolations
relating to deposits discoverable with existing exploration
techniques.
Annual production is the production output
of uranium ore concentrate from indigenous deposits,
expressed as tonnes of uranium.
Cumulative production is the total cumulative
production output of uranium ore concentrate from
indigenous deposits, expressed as tonnes of uranium,
produced in the period from the initiation of production
until the end of the year stated.
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