A dust-sampling technique that measures airborne dustiness on a mass
basis. In the glass tube is placed a layer, 1-1/2 in (3.8 cm) deep, of
sized granulated sugar weighing 100 g. By means of a suitable pump, air is
drawn through the sugar tube at a rate of approx. 1 ft3 /min
(0.0283 m3 /min). The dust is retained in the sugar tube, which
is then stoppered and sent to the laboratory for analysis. The sugar is
dissolved and the dust is caught on a filter paper that is incinerated to
give the weight of dust. Greenburg
A granular and somewhat friable and massive variety of quartz.
Syn:sugar spar
a. A set of apparently comagmatic igneous rocks. AGI
b. A collection of rock specimens from a single area, generally
representing related igneous rocks. AGI
c. A collection of rock specimens of a single kind; e.g., granites from
all over the world. AGI
d. In stratigraphy, the lithodemic unit next higher in rank to lithodeme.
It comprises two or more associated lithodemes of the same class (e.g.,
plutonic, metamorphic). For cartographic and hierarchical purposes, suite
is comparable to group. The name of a suite combines a geographic term,
the term suite, and an adj. denoting the fundamental character of the
suite; e.g., Idaho Springs Metamorphic Suite. AGI
e. A major group of Tertiary and younger igneous rocks thought by Harker
(1909) to characterize regions around each of the world's great oceans.
Because there is such a wide variety of tectonic environments and
associated rock types in these regions, the terms are now seldom used.
See also:Atlantic suite; Pacific suite; Mediterranean suite.
CF:lithodeme
See:consanguinity
On silts where the groundwater contains more than 0.1% of SO3 , or
where a clay soil has more than 0.5% of this substance, the use of
lime-free cement in all concrete work is essential to prevent the
resulting chemical attack. High-alumina cement gives complete protection,
but a sulfate-resisting cement to British Standard 12 may be used where
conditions are less severe. Hammond
The inorganic sulfur in coal other than the pyritic sulfur. BS, 1
Sulfate in soil can be precipitated as barium sulfate and measured so as
to indicate whether water or soil will have a harmful effect on concrete.
Hammond
A roast in which conditions in a furnace allow sulfur in feed to recombine
with calcined products to form sulfates. Syn:sulfatizing roast
Pryor, 3
The chemical reaction that takes place in many roasting operations in
which metallic sulfates form instead of oxides. Newton, 1
See:sulfating roast
In flotation, a method for treatment of various oxygen ores where
sulfhydryl collectors are used to float the base-metal minerals from
associated minerals. Gaudin, 2
a. A mineral compound characterized by the linkage of sulfur with a metal
or semimetal; e.g., galena, PbS, or pyrite, FeS2 . AGI
b. A mineral with S2- or S22- as its anion.
Enrichment of a deposit by replacement of one sulfide by another of high
value, as pyrite by chalcocite. AGI
An iron ore with sulfur as its main impurity. Mersereau, 2
Ore in which the sulfide minerals predominate. See also:mixed ore
a. That part of a sulfide deposit that has not been oxidized by
near-surface waters. See also:oxidized zone; protore. AGI
b. A generally manto-shaped deposit in which secondary sulfide enrichment
has occurred as a part of ore-deposit oxidation.
Syn:secondary sulfide zone
In conditioning a flotation pulp, addition of soluble alkaline sulfides in
aqueous solution to produce a sulfide-metal layer on an oxidized ore
surface. Pryor, 3
In flotation, a method for treatment of various oxide ores in which the
desired base-metal minerals are sulfidized, then the ore is floated as if
it were a sulfide ore. It is useful in treating lead carbonate ores, less
useful if other lead minerals are present, and of limited utility in
connection with copper and zinc ores. Gaudin, 2
A salt or ester of sulfurous acid; a compound containing the radical, SO
3- . AGI
A mineral in which sulfur and antimony are united chemically with a metal.
Weed, 2
An ore mineral of any metal or metals with which sulfur and arsenic are
united chemically. Weed, 2