A mineral formed at the same time as the rock enclosing it, by igneous,
hydrothermal, or pneumatolytic processes, and that retains its original
composition and form. CF:secondary mineral
AGI
Syngenetic ore deposit.
Ore that has remained practically unchanged from the time of original
formation. Stokes
An ore mineral that was deposited during the original period or periods of
metallization. The term has also been used to designate the earliest of a
sequence of ore minerals, as contrasted with later minerals of the same
sequence, which some writers have called secondary. To avoid confusion,
Ransome proposed the terms hypogene and supergene. Hypogene, as the word
implies, indicates formation by ascending solutions. All hypogene minerals
are necessarily primary, but not all primary ore minerals are hypogene;
e.g., sedimentary hematite is of primary deposition even though it formed
as a low-temperature precipitate.
The only crystalline phase capable of existing in equilibrium with a given
liquid; it is the first to appear on cooling from a liquid state and the
last to disappear on heating to the melting point. AGI
A refuse elevator that extracts the first or heavier reject; usually
situated at the feed end of a washbox. BS, 5
A relict mineral that was a constituent of the original rock, whether
igneous or sedimentary. Schieferdecker
A screen used to divide coal (usually raw coal) into sizes more suitable
for the subsequent cleaning of some or all of them. BS, 5
The surface subsidence that manifests itself a few months after mineral
extraction and that usually constitutes 60% to 90% of the total
subsidence. It varies according to the depth and thickness of the seam,
the nature of the overburden, the mining method, and the thoroughness of
the filling in the mined-out areas. The primary period is followed by the
secondary period, in which the surface subsides gradually for a period of
many years or even decades. Stoces
The shaft from the surface in which the first stage of hoisting is carried
out. Spalding
A constituent of alloys that is formed when atoms of an element B are
incorporated in the crystals of a metal A. In most cases, solution
involves the substitution of B atoms for some A atoms in the crystal
structure of A, but there are cases in which the B atoms are situated in
the interstices between the A atoms. CTD
An operation that produces or creates new dust. Hartman, 2
a. A structure in an igneous rock that originated contemporaneously with
the formation or emplacement of the rock, but before its final
consolidation; e.g., layering developed during solidification of a magma.
AGI
b. A primary sedimentary structure, such as bedding or ripple marks.
AGI
c. The structure preexisting the deformation and reequilibration
associated with the emplacement at shallow depth of a metamorphic body of
deep origin during an orogeny. CF:secondary structure
The first of a series of washboxes, which receives the feed and from which
one product at least is given further treatment. BS, 5
The first of a series of washers, receiving raw feed, from which at least
one product is retreated. BS, 5
The principal or original source from which drilling water is obtained, as
opposed to recirculated water. Long
Portion of a lode below that changed by leaching and secondary enrichment,
and characteristic of the type of ore most likely to persist into the
deeper levels of a mine. Pryor, 3
a. A machine that converts fuel or other natural energy into mechanical
power. Nelson
b. A tractor or other vehicle used to pull other machines.
Nichols, 1
c. Any machine capable of producing power to do work. Shell
a. A contrivance, such as a cap, tube, or wafer, containing percussion
powder or other compound for igniting an explosive charge; ignited by
friction, percussion, or electricity. Syn:percussion cap
Webster 3rd
b. The cartridge or that portion of a charge that carries a detonator or
is coupled to Cordtex fuse and that detonates or sets off the remainder of
the charge. The primer cartridge is placed at one end of the charge with
the detonator pointing toward the charge. See also:direct initiation
Nelson
c. In blasting, the cartridge in which the cap is placed.
Streefkerk
d. Usually the combination of a dynamite cartridge and a detonating cap.
Nichols, 1
The explosive cartridge into which a detonator has been inserted.
BS, 12