Assay: The chemical analysis of mineral samples to determine the metal content.
Asbuilt: (plural asbuilts), a field survey, construction drawing,
3D model, or other descriptive representation of an engineered design
for underground workings.
Composite: Combining more than one sample result to give an average result over a larger distance.
Concentrate: A metal-rich product resulting from a mineral
enrichment process such as gravity concentration or flotation, in which
most of the desired mineral has been separated from the waste material
in the ore.
Crushing: Initial process of reducing material size to render it more amenable for further processing.
Cut-off Grade (CoG) : The grade of mineralized rock, which
determines as to whether or not it is economic to recover its gold
content by further concentration.
Dilution: Waste, which is unavoidably mined with ore.
Dip: Angle of inclination of a geological feature/rock from the horizontal.
Fault: The surface of a fracture along which movement has occurred.
Footwall: The underlying side of an mineralized body or stope.
Gangue: Non-valuable components of the ore.
Grade: The measure of concentration of gold within mineralized rock.
Hanging wall: The overlying side of an mineralized body or slope.
Haulage: A horizontal underground excavation which is used to transport mined ore.
Igneous: Primary crystalline rock formed by the solidification of magma.
Kriging: An interpolation method of assigning values from samples to blocks that minimizes the estimation error.
Level: Horizontal tunnel the primary purpose is the transportation of personnel and materials.
Lithological: Geological description pertaining to different rock types.
Material Properties: Mineral properties.
Milling: A general term used to describe the process in which the
ore is crushed and ground and subjected to physical or chemical
treatment to extract the valuable metals to a concentrate or finished
Mineral/Mining Lease: A lease area for which mineral rights are held.
Mining Assets: The Material Properties and Significant Exploration Properties.
Profitability Index: The ratio of payoff to investment of a
proposed project. It is a useful tool for ranking projects because it
allows you to quantify the amount of value created per unit of
Sedimentary: Pertaining to rocks formed by the accumulation of sediments, formed by the erosion of other rocks.
Sill: A thin, tabular, horizontal to sub-horizontal body of
igneous rock formed by the injection of magma into planar zones of
Stope: Underground void created by mining.
Stratigraphy: The study of stratified rocks in terms of time and space.
Strike: Direction of line formed by the intersection of strata
surfaces with the horizontal plane, always perpendicular to the dip
Sulfide: A sulfur bearing mineral.
Tailings: Finely ground waste rock from which valuable minerals or metals have been extracted.
Thickening: The process of concentrating solid particles in suspension.
Total Expenditure: All expenditures including those of an operating and capital nature.
US Imperial to Metric conversions:
- Linear Measure
- 1 inch = 2.54 cm
- 1 foot = 0.3048 m
- 1 yard = 0.9144 m
- 1 mile = 1.6 km
- Area Measure
- 1 acre = 0.4047 ha
- 1 square mile = 640 acres = 259 ha
- 1 short ton (st) = 2,000 lbs = 0.9071 metric tons
- 1 lb = 0.454 kg = 14.5833 troy oz
- Assay Values
- 1 oz per short ton = 34.2857 g/t
- 1 troy oz = 31.1036 g/t
- 1 part per billion = 0.0000292 oz/ton
- 1 part per million = 0.0292 oz/ton = 1g/t
: A statistical representation of the characteristics (usually grade).