Technically, the distance cored per round trip, which is expressed in
number of feet or in relative terms, as short or long. Core blocks may
occur before the core barrel is filled; the barrel then is short of being
full, resulting in a short core run. Loosely, the amount of core recovered
per round trip. Long
One or several pieces of whole or split parts of core selected as a sample
for analysis or assay. Long
Silica sand to which a binding material has been added to obtain good
cohesion and porosity after drying for the purpose of making cores.
Osborne
A machine capable of rotating at high speed, equipped with a thin metal
disk having diamonds inset in its edge. Used somewhat like a bench saw to
cut core longitudinally into sections. CF:core splitter;
diamond-saw splitter. Long
A roofed and enclosed structure in which core-filled boxes are stored.
Also called core house; core shanty. Long
The slurry produced during abrasion by the cutting bit, or through
fracture and grinding of part of the sample during this process.
Pryor, 3
Tool employing a chisel to split core longitudinally in half, rarely in
quarter, sections. One-half usually is assayed, and the other half is
retained and stored. Term also may be applied to a diamond saw used for
the same purpose. See also:core saw
A hole drilled with a core drill, usually for the purpose of securing
geologic information and sometimes with the purpose of investigating
geologic structure. AGI
See:atoll texture
A spiral chute having a center core or column about which it is
fabricated, with the core serving as the inside guard.
Used in a general sense as a syn. for core analysis; core assay. In a
strict sense, the term should not be used to designate the mineral content
of the core sample unless the valuable mineral is gold, silver, platinum,
etc. Long
The zone of maximum air velocity in a mine roadway, usually at or near the
center of the road. Nelson
In a battery wall, those courses of brick, none of which are directly
exposed on either side. AISI
a. The portion of the core lost through erosive action of the drill
circulation fluid. Long
b. The act or process of erosion of core by washing action of the drill
circulation fluid. Long
A variable composition between the center and surface of a unit of
structure (such as a dendrite, grain, or carbide particle) resulting from
nonequilibrium growth that occurs over a range of temperature.
ASM, 1
See:core bit
A tool that is used when a core is required. In drilling, where speed is
the aim, cores are not made. When, however, an important bed or horizon is
approached, and detailed geological information is required, the coring
bit is inserted and core drilling commenced. Also called corer.
Nelson
A variety of amphibole or hornblende, resembling cork; the lightest of all
minerals. Fay
a. A device resembling a corkscrew, used as a fishing tool. Long
b. A borehole following a spiraled course. Long
c. A cylindrical surface, such as the outer surface of a piece of spirally
grooved core. Also called fluted core. Long
See:fluted core