gangue
[gang]
/gæŋ/
noun
1.
rock or mineral matter of no value occurring with the metallic ore in a vein or deposit.
Origin
1800-10;
<
French
<
German
Gang;
see
gang
1
Examples from the web for
gangue
Grain size varies according to degree of metamorphism as does the nature of
gangue
minerals.
Quartz and calcite are usual
gangue
minerals, and organic debris occurs in some deposits.
gangue
quartz is not usually amethystine, and
gangue
calcite is poor in iron and manganese.
The method is determined by the differences in surface activity between the iron and
gangue
particles.
Slime is separated from the
gangue
and is reground and refloated to remove additional copper value.
The residual dolomite
gangue
was crushed and sold as agricultural dolomitic limestone.
Cinnabar and stibnite occurred in a
gangue
consisting chiefly of quartz and kaolin, with a small amount of dolomite.
However, low acid-buffering capacity may be offset by the local presence of calcite
gangue
.
The predominant
gangue
minerals are siderite and quartz.
The tetrahedrite occurs in a
gangue
of calcite and quartz.
British Dictionary definitions for
gangue
gangue
/
ɡæŋ
/
noun
1.
valueless and undesirable material, such as quartz in small quantities, in an ore
Word Origin
C19: from French
gangue,
from German
Gang
vein of metal, course; see
gang
1