A dark, translucent massive or coarsely crystalline variety of nepheline;
greasy luster; may be used as an ornamental stone. Also spelled:
elaeolite; elaolite.
Any conveyor used to discharge material at a point higher than that at
which it was received. Term is specific. applied to certain underground
mine conveyors.
A grader equipped with a collecting device and elevator, by which the
loosened material can be loaded to spoil banks or into vehicles for
transport. See also:belt loader
A general term for a topographic feature of any size that rises above the
adjacent land or the surrounding ocean bottom; a place or station that is
elevated. The vertical distance from a datum (usually mean sea level) to a
point or object on the Earth's surface; esp. the height of a ground point
above the level of the sea. The term is used synonymously with altitude in
referring to distance above sea level, but in modern surveying practice
the term elevation is preferred to indicate heights on the Earth's
surface, whereas altitude is used to indicate the heights of points in
space above the Earth's surface. AGI
In gravity measurements, the corrections applied to observed gravity
values because of differences of station elevation to reduce them to an
arbitrary reference or datum level, usually sea level. The corrections
consist of (1) the free-air correction, to take care of the vertical
decrease of gravity with increase of elevation, and (2) the Bouguer
correction, to take care of the attraction of the material between the
reference datum and that of the individual station. In seismic
measurements, the corrections are applied to observed reflection time
values due to differences of station elevation in order to reduce the
observations to an arbitrary reference datum or fiducial plane.
AGI
a. An apparatus used to facilitate the removal of coal from shuttle cars
or low conveyors into mine cars. BCI
b. A type of conveyor for raising coal, stone, ore, or slurry, usually at
the coal preparation plant or mill. Normally it comprises a series of
steel buckets attached to an endless chain. See also:bucket elevator
Nelson
c. A cage hoist. Nichols, 1
d. A device for raising or lowering tubing, casing, or drive pipe, from or
into well.
e. An endless belt or chain conveyor with cleats, scoops, or buckets for
raising material. Webster 3rd
f. A cage or platform and its hoisting machinery, as in a building or
mine, for conveying persons or goods to or from different levels.
See also:hoist
g. A vertical or steeply inclined conveyor. BS, 5
h. A machine that raises material on a belt or a chain of small buckets.
Nichols, 1
i. A hinged circle or latch block provided with long links to hang on a
hoistlike hook and used to hoist collared pipe, drill pipe and/or casing,
and drill rods provided with elevator plugs. Some large elevators are
fitted with slips for use on uncollared or flush-outside tubular
equipment. Long
j. A term sometimes and incorrectly used as a syn. of lifting bail.
See also:hydraulic dredge; vertical reciprocating conveyor.
Long
k. An apparatus used to facilitate the removal of coal from shuttle cars
or low conveyors into mine cars. BCI
A vessel generally rectangular in plan and having a back suitably shaped
for attachment to a chain or belt and a bottom or front designed to permit
discharge of material as the bucket passes over the head wheel of a bucket
elevator.
A dredger fitted with a bucket ladder. Hammond
A short steel plug provided with a pin thread by means of which it may be
coupled to the upper end of a stand of drill rods. Its diameter is greater
than that of the drill rod to which it is attached, and hence it provides
a shoulder that can be grasped by an elevator. When each stand of rod is
provided with an elevator plug and an elevator is used in lieu of a
rod-hoisting plug, the handling of rods is facilitated and a round trip
can be made in less time. Syn:rod plug
A rope used to operate an elevator. Zern
A small-grained variety of pyrope garnet in the trap tuff of Kincraig
Point, near Elie, Fife, Scotland.
a. To liquate; smelt. Webster 3rd
b. To part by liquation. Webster 3rd
A name applied to a subgroup of pyrobitumens rich in oxygen and partly
soluble in alkali. They resemble an earthy brown coal and probably
represent a product of intense weathering of bitumens. Tomkeieff
A hexagonal mineral, Ca5 (SiO4 ,PO4 ,SO4 )
3 (F,OH,Cl) ; apatite group; it is chlorellestadite if (Cl>OH,F),
fluorellestadite if (F>OH,Cl), or hydroxylellestadite if (OH>F,Cl).
Hydroxylellestadite occurs as veinlets in blue calcite associated with
wilkeite, idocrase, and similar contact metamorphic minerals at Crestmore,
Riverside County, CA.
In optics, elliptically polarized light consisting of upward-spiraling
vibration vectors, the surface of which is elliptical rather than
circular, as in circular polarization. It is caused by the inconstant
lengths of vibration vectors of mutually perpendicular plane-polarized
waves whose path differences differ in phase by amounts other than
(n+1)/4lambda on emergence from a crystal. AGI
A plunger-type jig of either single or mulitple compartments. Its
distinguishing features are (1) an automatic control in the form of a
cylinder that measures the specific gravity of the mixture of coal and
refuse; (2) the refuse draw is a star gate under the overflow lip in each
compartment, which extends the full width of the jig; and (3) the hutch is
commonly collected with a screw conveyor and discharged through the refuse
elevator. Used both for treatment of nut and slack sizes of bituminous
coal. Mitchell
An isometric mineral, K2 NaAlF6 ; associated with pachnolite
in cryolite-bearing pegmatites of the Pikes Peak region, El Paso County,
CO.
An orthorhombic mineral, Na2 ZrSi6 O15 .3H2 O;
in fibrous, columnar, prismatic crystals in albitized nepheline-syenite
pegmatites at Narsarsuk, Greenland; Kola Peninsula, Russia; Mont St.
Hilare, PQ, Canada; and Tarbagatai, Kazakhstan.
In dissolution of gold by dilute aerated cyanide solution this reads: 4Au
+ 8NaCN + O2 + 2H2 O = 4NaAU(CN)2+4 NaOH . Analogous
equation is given for silver. Other mechanisms have been suggested by
Janin and Bodlaender, the latter requiring two stages of reaction with the
intermediate formation of hydrogen peroxide.
See also:MacArthur and Forest cyanide process
Electrical exploration method in which an electrical transient is sent
into the Earth and the change in shape of this transient is studied.
Schieferdecker