The plane that joins the troughs of a series of beds in a syncline;
generally, but not necessarily, the same as the axial plane.
See also:trough
A trough-shaped ore deposit formed between sedimentary beds in the troughs
of synclinal structures.
a. A washer applying the principle of alluviation in troughs.
BS, 5
b. In its simplest form, a trough washer is a sloping wooden trough, 1-1/2
to 2 ft (0.46 to 0.6 m) wide, 8 to 12 ft (2.4 to 3.7 m) long, and 1 ft
(0.9 m) deep, open at the tail end, but closed at the head end. It is used
to float adhering clay or fine material from the coarser portions of ore
or coal. A log washer.
See:troctolite
A wooden channel for air or water. Fay
One-twelfth of a pound of 5,760 grains (troy pound), or 480 grains. A troy
ounce equals 20 pennyweights, 1.09714 avoirdupois oz, or 31.1035 g. It is
used in all assay returns for gold, silver, and platinum-group metals.
Fay; Zimmerman
A unit of weight that equals 5,760 grains, 12 tr oz, 240 pennyweights,
13.1657 avoirdupois oz, 0.82286 avoirdupois lb, or 373.2509 g.
Fay; Zimmerman
These are the weights used for precious metals. The equivalents are 24
grains = 1 pennyweight; 20 pennyweights = 1 oz; 12 oz = 1 lb. The troy
grain is the same as the avoirdupois grain, but the ounce is larger on the
troy scale; 1 tr oz = 31.103 g; 1 avoirdupois oz = 28.35 g.
Anderson
Any wheeled vehicle, usually self-propelled, used to transport heavy
articles or materials. In mining, usually applied to dump and/or
bottom-dump semitrailers used to transport mined waste and ore materials.
The number of types of these haulage units varies widely from the small
2-st (1.8-t) standard dump truck to the unit with capacity 200 st (181 t)
or greater. For larger stripping operations, where the haulage conditions
are not too rugged, a diesel tractor pulling a bottom-dump semitrailer of
capacity 40 to 60 st (36 to 54 t) is most common. The newer trucks are
equipped with power steering, power brakes, torque converters, and
automatic transmissions.
A concrete mixer, generally mounted on a lorry, or crawler-type tracks,
which mixes concrete during the journey from the batching plant to the
construction site. Hammond
See:track roller
A mixture of chloraluminite and natroalunite.
The azimuth measured clockwise from true north through 360 degrees .
AGI
The bearing expressed as a horizontal angle between a geographic meridian
and a line on the Earth; esp. a horizontal angle measured clockwise from
true north. CF:magnetic bearing
The actual depth of a specific point in a borehole measured vertically
from the surface in which the borehole was collared.
Syn:true vertical depth
a. A syn. of dip, used in comparison with apparent dip. Syn:full dip
AGI
b. The angle at which veins, strata, etc., dip, as measured vertically
downward from the horizon along a line at right angles to the strike of
the veins, strata, etc.; also, the dip of a vein, strata, etc., as
determined on oriented core. See also:core orientation; oriented core;
apparent dip. Long
c. The maximum angle which an inclined bed makes with a horizontal plane.
It is the direction in which water would flow if poured on the smooth
upper surface of the bed at the outcrop. Also called dip.
See also:level course
d. See:three-dimension dip
See:fissure vein
a. See:bone coal
b. Comparatively high-ash material so nearly homogeneous that its quality
cannot readily be improved by crushing and cleaning. BS, 5
The integral, over the whole of a finite extension, of each infinitesimal
elongation divided by the corresponding momentary length. It is equal to
loge (1 + epsilon ), where epsilon is the strain as ordinarily
defined. See also:strain
For an axially loaded bar, the load divided by the corresponding actual
cross-sectional area. It differs from the stress as ordinarily defined
because of the change in area due to loading. See also:stress
Roark
An occurrence of ore, usually disseminated through a gangue of veinstone,
and having more or less regular development in length, width, and depth.
See also:vein; fissure vein. Fay