Said of a major vein dividing or fraying into smaller fissures; also, said
of an ore comprising a series of such veins. AGI
Ore in fractures that diverge from a major fracture.
An old method of transportation in mines in which horses were used to pull
the mine cars along the roadways. Stables were installed underground in
order for the horses to be kept permanently in the mine. Horse
transportation has been replaced today by mechanical transport.
Stoces
A device used for raising ore or water from mines, provided with radiating
beams to which horses, oxen, or camels may be yoked. Sandstrom
A possibly isometric mineral, Cu3 Sb ; silver-white; sp gr, 8.8;
reported from Lesbos Island, Greece.
An elongate, relatively uplifted crustal unit or block that is bounded by
faults on its long sides. It is a structural form and may or may not be
expressed geomorphologically. Etymol: German: no direct English
equivalent. CF:graben
A magnesian variety of fayalite.
A joint between a hose and a steel pipe, or between two lengths of hose.
Hammond
A nickeloan variety of magnesite.
Two-rate valuation formula, once much used to determine present value (Vp)
of mining properties or shares, with redemption of capital invested.
Largely replaced by Morkill's formula. Pryor, 3
A rock or mineral that is older than rocks or minerals introduced into it
or formed within or adjacent to it, such as a host rock, or a large
crystal with inclusions of smaller crystals of a different mineral
species; a palasome. Ant: guest. AGI
A common element that is substituted by a trace element in a rock mineral.
A body of rock serving as a host for other rocks or for mineral deposits;
e.g., a pluton containing xenoliths, or any rock in which ore deposits
occur. It is a somewhat more specific term than country rock. AGI
Applied to a mine or part of a mine that generates methane in considerable
quantities. Fay
An area, adjacent to the runout table, where hot rolled metal is placed to
cool. Sometimes called the cooling table. ASM, 1
Air forced into a furnace after having been heated. Fay
A stove tender at blast furnaces. Fay
The plenum system of ventilation. Webster 2nd
A process developed by the U.S. Bureau of Mines in which a hot solution of
potassium carbonate is used to absorb impurities from gases and is then
regenerated for reuse in a continuous cycle with maximum efficiency and
minimum wasted heat. Also called hot-potash process; Benfield process.
A heavily shielded enclosure in which radioactive materials can be handled
remotely through the use of manipulators and viewed through shielded
windows so that there is no danger to personnel. Lyman
Much more sensitive than the common dip needle. The instrument consists of
a magnetic needle free to rotate about a horizontal axis and a nonmagnetic
bar with a counterweight at the end which is attached to the needle at its
pivot, the two axes making an angle that can be varied. It measures
changes in the total field and can be used to measure variations in the
vertical field if its plane is oriented in a direction perpendicular to
the magnetic meridian. See also:dip needle