The act or process of using a Geiger-Mueller probe or counter to measure
the intensity of the gamma rays emitted by the radioactive substance
contained in rocks traversed by a borehole. Long
A trigonal mineral, MgTiO3 ; ilmenite group; forms a series with
ilmenite; in highly metamorphosed magnesian marbles associated with
brucite, spinel, or diopside; in serpentinites with chromium-rich
chlorites, and in gem gravels of Sri Lanka.
a. A sealed and partly evacuated glass tube containing electrodes. Used
for the study of electric discharges through gases. Standard, 2
b. A gas-filled discharge tube having various shapes and usually
containing a narrowly constricted portion in which the luminosity is
intensified. Webster 3rd
a. A translucent to transparent, semisolid, apparently homogeneous
substance in a colloidal state, generally elastic and jellylike, offering
little resistance to liquid diffusion, and containing a dispersion or
network of fine particles that have coalesced to some degree. AGI
b. A nonhomogeneous gelatinous precipitate; e.g., a coagel. AGI
c. A liquefied mud, which became firm and then reabsorbed most of the
water released earlier. A gel is in a more solid form than a sol, and can
sustain limited shear stress. See also:thixotropy
Trademark for a semigelatin high explosive of relatively high weight
strength of 65%; very good water resistance. Used in underground mining,
in quarrying, in construction, and in general blasting. CCD, 2
See:gelatin dynamite
A device used in borehole surveying. A tube, containing a compass floating
in molten gelatin, is lowered to the point in the borehole at which its
verticality is required. It is left in position until the gelatin sets and
is then withdrawn. The compass indicates the direction and a small plumb
bob shows the angle of dip. Nelson
A type of highly water-resistant dynamite, characterized by its gelatinous
consistency, containing nitroglycerin and nitrocellulose; straight gelatin
dynamite is a series of gelatins that include sodium nitrate, while
ammonium gelatin dynamites use ammonium nitrate.
Syn:ammonia gelatin dynamite; gelatin.
Explosives in which a portion of the nitroglycerin is replaced with
ammonium nitrate. The explosive velocity is reduced, but the substantial
resistance to water is retained. Less expensive than gelatin dynamites.
Carson, 1
A general term relating to explosives in which a principal constituent,
nitroglycerin, is given a gelatinous consistency by mixing it with
nitrocotton. BS, 12
The formation of a gel from a sol, as by coagulation or by precipitation
with an electrolyte. AGI
Cement to which a small percentage of bentonite has been added either dry
or mixed with water. Such an addition particularly adapts the slurry for
use in cementing casing and recovering lost circulation because it reduces
loss of slurry to the formation, makes for a more homogeneous mixture,
increases the water-cement ratio, reduces loss of water to the formation,
and sets in substantially the same volume as occupied when placed.
Brantly, 1
A general term relating to explosives of the gelatin type in which there
is a proportion of wood, metal, and oxygen-containing salts.
BS, 12
The colloidal product of plant decay that becomes the principal
constituent of coal. See also:carbohumin
Constituent of torbanite, consisting of birefringent pale yellow
microscopic crushed spheres. CF:humosite
matrosite; retinosite. Tomkeieff
The ability or the measure of the ability of a colloid to form gels.
Brantly, 1
A cut-and-polished stone that has intrinsic value and possesses the
necessary beauty, durability, rarity, and size for use in jewelry as an
ornament or for personal adornment; a jewel whose value is not derived
from its setting. Syn:cut stone
A crystal from which a gem can be cut.
A gravel placer containing an appreciable concentration of gem minerals.
AGI
a. The science of gems. Syn:gemology
b. A collection of gems; gems considered collectively.
c. A house or receptacle for gems and jewels.