| chemically treated and heated carbon which has the ability to absorb gold |
| the physical or chemical change in the composition of rock |
| iron arsenic sulphide, FeAsS |
| waste rock or tailings used to fill mined out areas, particularly underground |
| dark colored, fine-grained volcanic igneous rock |
| non-ferrous metals inferior in value to precious metals; i.e. copper lead, zinc, nickel |
| solid rock beneath superficial soil cover and unconsolidated sediments |
| an exposed zone or band of a particular kind of rock |
| the oxidation of elements caused by naturally occurring bio-organisms in rock. Bioxidation is used in the recovery of gold from sulhpide rock by providing the optimum temperature, acidity (pH) and oxygen levels for the natural oxidation process to work most effectively |
| rock consisting of angular fragments in a finer-grained matrix |
| the product of smelting or refining precious metals, usually in the form of bars or ingots |
| revenue, net of transportation, refining and treatment charges, from the sale of metals derived in conjunction with the production of the primary mine metal |
| a process to recover dissolved gold onto activated carbon, by introducing activated carbon into a gold-cyanide slurry during the agitation process and subsequently separating the loaded carbon from the slurry for the removal of the gold |
| a process to recover dissolved gold onto activated carbon, by introducing activated carbon into the system after the gold has been dissolved by the cyanide solution and subsequently separating the loaded carbon from the slurry for the removal of the gold |
| includes production costs, royalties, marketing and refining charges, together with all administration expenses at the operating level |
| platey iron-magnesium silicate, typically formed during alteration by other minerals at low temperatures |
| any non-Newmont employee or group working for an operation and who are regularly exposed to mine hazards |
| a mining method which removes ore in horizontal slices and the remaining void is filled with waste rock before proceeding to mine the next slice of ore |
| the lowest grade of mineralized material considered to be economic and used to calculate the ore reserve in a deposit |
| dissolving gold or silver in a weak solution of sodium cyanide or potassium cyanide |
| the angle of incline from horizontal of a planar feature, such as an orebody |
| ore bearing small particles of valuable minerals spread throughout the rock |
| intrusive dyke rock made up mostly of feldspar and pyroxene |
| unrefined gold and silver bars usually containing more than 90 percent precious metal |
| an underground mining method whereby ore is mined by drifting along the mineralization and backfilling the void so that the next level can be mined |
| an igneous intrusion which cuts across the bedding of other planar structures in the country rock |
| the alteration, loosening and removal of land surface material by the actions of running water and wind |
| the total number of hours worked at the operation |
| igneous rock which has been erupted to the surface by volcanic activity |
| distinctive rock type |
| death of an individual as a result of a work related accident or illness |
| a break in the sub-surface strata where there is displacement relative to the original position of strata |
| a comprehensive study undertaken to determine the economic feasibility of a project; the conclusion will determine if a production decision can be made and is used for financing arrangements |
| all work related injury or illness that does not require medical attention |
| a process by which some mineral particles are induced, by the introduction of specific reagents, to become attached to bubbles and float while other particles sink; the valuable minerals are concentrated and separated from the gaunge |
| a bend in rock strata |
| a unit of geological mapping, consisting of a large and persistent stratum of rock |
| coarse-grained igneous rock containing minor silica |
| gold plus silver expressed in equivalent ounces of gold using a conversion ratio dependent on prevailing gold and silver prices |
| the amount of valuable material in a specific volume of rock; typically expressed as grams per tonne for precious metals and as a percentage for base metals |
| an igneous texture characterized by irregular intergrowths of quartz and feldspar |
| recovery of gold from crushed rock using gold's high specific gravity to separate it from lighter material |
| metamorphosed mafic igneous rock which is typically green due to content of chlorite, actinolite, etc. |
| the framework building at the top of the shaft which houses the hoisting mechanisms |
| the effective offsetting of a price or exchange risk inherent in another transaction or arrangement |
| the rock containing minerals; eg an orebody |
| the selective dissolution of metals from ore to concentrates |
| pertaining to heated water which transports minerals in solution |
| international standards for organizations to implement quality management systems and quality assurance programs |
| international standards for organizations to implement sound environmental management systems |
| drilling between previously drilled holes to provide additional geological information to more accurately define mineralization |
| coarse gravel material remaining behind when finer material has been eroded away |
| molten magma extruded from volcanic vent |
| igneous rock with dark coloration due to high magnesium and iron content |
| a precipitation process to recover precious metals from a cyanide solution using zinc dust |
| metamorphosed sedimentary rocks |
| the process by which one mineral is replaced by another |
| the plant for grinding ore to a fine powder and extracting the economic metals by physical and/or chemical means |
| host rock in which minerals of potential commercial value occur |
| a share of the net revenue generated from the sale of metal produced by the mine |
| a mine on the surface |
| a mixture of minerals, host rock and waste rock which is expected to be profitably mined |
| weight of gold with a fineness of 999.9 parts per 1,000; 1 Troy ounce is equal to 31.1034 grams |
| part of a geological formation or structure that appears at the surface of the earth |
| chemical reaction between any substance and oxygen |
| mineralized rock in which the minerals have been partially or wholly oxidized by weathering processes |
| igneous rocks containing large crystals in a fine-grained groundmass |
| an oxidation process which uses high temperature and pressure to convert refractory sulphide mineralization into amenable oxide ore |
| any unplanned interruption or downgrading of operating processes resulting from an accident, abuse, negligence, or act of God |
| cash cost plus depreciation, amortization and reclamation |
| an iron sulphide, FeS |
| an iron sulphide, FeS |
| a vertical or upward inclined drive to connect underground mine levels or to the surface |
| a chemical used in the mineral recovery process |
| the rehabilitation to beneficial use of land disturbed by mining activity |
| gold mineralization encapsulated in silica or sulphide, which is not amenable to cyanide leaching methods |
Mineral Reserves are
sub-divided in order of increasing confidence into Probable Mineral Reserve
and Proven Mineral Reserves. A Probable Mineral Reserves has a lower level of
confidence than a Proven Mineral Reserve.
A Mineral Reserve is the economically mineable part of a Measured or Indicated
Mineral Resource demonstrated by at least a Preliminary Feasibility Study. The
Study must include adequate information on mining, processing, metallurgical,
economic and other relevant factors that demonstrate, at the time of
reporting, that economic extraction can be justified. A Mineral Reserve
includes dilution material and allowances for losses that may occur when the
material is mined. |
| A Probable
Mineral Reserve is the economically mineable part of an Indicated, and in some
circumstances a Measured Mineral Resource demonstrated by at least a
Preliminary Feasibility Study. This Study must include adequate information on
mining, processing, metallurgical, economic and other relevant factors that
demonstrate, at the time of reporting, that economic extraction can be
justified. |
| A Proven
Mineral Reserve is the economically mineable part of a Measured Mineral
Resource demonstrated by at least a preliminary Feasibility Study. This Study
must include adequate information on mining, processing, metallurgical,
economic and other relevant factors that demonstrate, at the time of
reporting, that economic extraction is justified. |
| Mineral Resources are
sub-divided, in order of increasing geological confidence, into Inferred,
Indicated and Measured categories. An Inferred Mineral Resource has a lower
level of confidence than that applied to an Indicated Mineral Resource. An
Indicated Mineral Resource has a higher level of confidence than an Inferred
Mineral Resource but has a lower level of confidence than a Measured Mineral
Resource. |
| An Inferred
Mineral Resource is that part of a Mineral Resource for which quantity and
grade or quality can be estimated on the basis of geological evidence and
limited sampling and reasonable assumed, but not verified, geological and
grade continuity. The estimate is based on limited information and sampling
gathered through appropriate techniques for location such as outcrops,
trenches, pits, workings and drill holes. |
| An
Indicated Mineral Resources is that part of a Mineral Resource for which
quantity, grade or quality, densities, shape and physical characteristics, can
be estimated with a level of confidence sufficient to allow the appropriate
application of technical and economic parameters, to support mine planning and
evaluation of the economic viability of the deposit. The estimate is based on
detailed and reliable exploration and testing information gathered through
appropriate techniques from locations such as outcrops, trenches, pits,
workings and drill holes that are spaced closely enough for geological and
grade continuity to be reasonably assumed. |
| A Measured
Mineral Resource is that part of a Mineral Resource for which quantity, grade
or quality, densities, shape, physical characteristics are so well established
that they can be estimated with confidence sufficient to allow the appropriate
application of technical and economic parameters, to support production
planning and evaluation of the economic viability of the deposit. The estimate
is based on detailed and reliable exploration, sampling and testing
information gathered through appropriate techniques from locations such as
outcrops, trenches, pits, workings and drill holes that are spaced closely
enough to confirm both geological and grade continuity. |
| mining method used for flat-lying deposits where the ore is removed in chambers or rooms leaving pillars for support |
| fine-grained metamorphic rock with laminations similar to slate |
| a vertical passage in an underground mine used for transporting personnel, equipment, supplies and mined material |
| replacement of silica |
| current price of gold or other commodity traded in the immediate market |
| a 3-dimensional network of veins or veinlets |
| the working area from which ore is extracted in an underground mine |
| the direction or bearing of a mineralized vein or rock formation |
| the ratio of the amount of waste rock removed per tonne of ore mined |
| a mineral compound characterized by the linkage of sulfur with metal or semimetal; eg galena, PbS, or pyrite, FeS2 |
| a fold of strata forming an inverted arch |
| material rejected from a treatment plant after the valuable minerals have been recovered |
| a mineral characterized by the linkage of metal with tellurium |
| basaltic magma containing little or no olivine |
| strata of volcanic ash |
| a marine clastic sediment deposited by sea bed currents laden with suspended material |
| igneous rock with very low silica content |
| the rock mass adjacent to a fault, fault zone or lode |
| near surface zone in which the exposed rock has been chemically or physically changed due to the action of rain, water, etc. |
