Геология / 4 курс / Поиск и разведка МПИ / Кодекс JORC

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Classification.

• In addition to general requirements to

assess volume and density there is a

need to relate stone frequency (stones

per cubic metre or tonne) to stone size

(carats per stone) to derive grade

(carats per tonne). The elements of

uncertainty in these estimates should be

considered, and classification developed

accordingly.

Generic Term

Synonyms and

Intended generalised meaning

similar terms

Tonnage

Quantity, Volume

An expression of the amount of material

of interest irrespective of the units of

measurement (which should be stated

when figures are reported).

Grade

Quality, Assay,

Any physical or chemical measurement

Analysis (Value)

of the characteristics of the material of

interest in samples or product. Note that

the term quality has special meaning for

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diamonds and other gemstones. The

units of measurement should be stated

when figures are reported.

Metallurgy

Processing,

Physical and/or chemical separation of

Beneficiation,

constituents of interest from a larger

Preparation,

mass of material. Methods employed to

Concentration

prepare a final marketable product from

material as mined. Examples include

screening,

flotation,

magnetic

separation, leaching, washing, roasting

etc.

Recovery

Yield

The percentage of material of initial

interest that is extracted during mining

and/or processing. A measure of mining

or processing efficiency.

Mineralisation

Type of deposit,

Any single mineral or combination of

orebody, style of

minerals occurring in a mass, or

mineralisation.

deposit, of economic interest. The term

is intended to cover all forms in which

mineralisation might occur, whether by

class of deposit, mode of occurrence,

genesis or composition.

Ore Reserves

Mineral Reserves

‘Ore Reserves’ is preferred under the

JORC Code but ‘Mineral Reserves’ is in

common use in other countries and is

generally

accepted. Other

descriptors

can be used to clarify the meaning e.g.

coal reserves, diamond reserves etc.

Cut off grade

Product

The lowest grade, or quality, of

specifications

mineralised material that qualifies as

economically mineable and available in

a given deposit. May be defined on the

basis of

economic evaluation, or on