A triclinic mineral, Sb2 S2 O ; pseudomonoclinic; occurs as
soft tufts of cherry-red capillary crystals with one perfect cleavage; an
alteration product of stibnite. Syn:antimony blende; pyrostibite;
pyrostibnite; red antimony; pyroantimonite.
Corn. Sand blown off the seashore into the country and concreted there.
Atom that has lost the valence electrons of its outermost shell.
Pryor, 3
See:roasting
A monoclinic mineral, 4[Na2 (H2 O)3 B4 O (sub
6) (OH)2 ] ; soft, colorless to white; in the Mojave Desert and
Kern County, CA; a major source of borax and boron compounds in the United
States. See also:Rasorite
a. A term generally used for organic matter in sedimentary rocks that is
insoluble in common organic and inorganic solvents.
b. The solid, organic substance in shales that yields oil when the shales
undergo destructive distillation.
See:oil shale
A variety of talc with randomly stacked structure; forms a series with
nickel-kerolite. Also spelled cerolite.
A type of nigritite that is derived from kerogen. CF:polynigritite;
humonigritite. AGI
As sometimes practiced, this method is a combination of bulk oil flotation
and froth flotation. By adding large quantities of kerosine to a pulp plus
a small amount of frother and agitating vigorously, surfaces of the
amenable mineral (coal) are attracted to both the oil and air bubbles,
forming heavy flocs. This type of concentrate is more readily dewatered
than ordinary froth and therein lies its advantage, plus the fact that
coarser particles (6 to 10 mesh) can be handled than in ordinary froth
flotation. Also called granulation. Syn:agglomeration
Substance originally described as a variety of oil shale but later proved
to be similar to torbanite. See also:boghead coal; torbanite.
Tomkeieff
A variety of vermiculite.
A lamprophyre containing biotite and plagioclase (usually oligoclase or
andesine), with or without clinopyroxene and olivine. Defined by Delesse
in 1851; named for the village of Kersanton, France. AGI
N. of Eng. In coal mining, to cut under. See also:kerf
kirve. Zern
A mineral, (Cu,Sn,Zn)S, containing 30.36% copper, 25.25% tin, 11.16% zinc,
and 23.40% sulfur. In quartz sulfide ore from Kester, Magadan, Yakutia,
northeast Siberia, Russia. Named from locality. Syn:isostannite;
khinganite. Spencer, 6
A depression in the ground surface formed by the melting of a large,
detached block of stagnant ice wholly or partly buried by glacial drift.
AGI
See:horseback; slip.
a. A smooth, rounded piece of rock, cylindrical in shape, which may drop
out of the roof of a mine without warning, sometimes causing serious
injuries to miners. The surface usually has a scratched, striated, or
slickensided appearance and frequently has a slick, soapy, unctuous feel.
The origin of this feature is thought to be the remains of the stump of a
tree that has been replaced by sediments so that the original form has
been rather well preserved. Sometimes spelled kettlebottom. Also called
bell; pot; camelback; tortoise. Syn:caldron
pot bottom. CF:black bat
b. See:horseback; caldron bottom.
Skimmings resulting from the desilverization of lead bullion. It consists
principally of lead oxides mixed with metallic lead. Fay
In ore dressing, smelting, and refining, a person who (1) refines lead in
a series of oil-fired kettles, and (2) removes silver and copper from
black mud in a gas-fired kettle, preparatory to the separation of gold.
DOT
In ore dressing, smelting, and refining, a person who melts and fumes
antimony in oil-fired kettles to make antimony oxide. DOT