A group of parallel dikes. CF:dike swarm
A group of dikes, which may be in radial, parallel, or en echelon
arrangement. Their relationship with the parent plutonic body may not be
directly observable. CF:dike set
An increase in the bulk volume of a granular mass during deformation,
caused by a change from close-packed structure to open-packed structure,
accompanied by an increase in the pore volume. The latter is accompanied
by rotation of grains, microfracturing, and grain boundary slippage.
AGI
See:P wave; compressional wave.
Deformation by a change in volume but not shape. Also spelled: dilatation.
AGI
A phase transformation requiring change in coordination about a cation,
e.g., quartz with silica tetrahedra to stishovite with silica octahedra.
CF:reconstructive transformation; displacive transformation;
rotational transformation.
A mineral deposit in a vein space formed by bulging of the walls,
contrasted with veins formed by wall-rock replacement. AGI
The attention and care legally required of a person (for example a claim
holder) while that person has temporary possession of a property. With
regards to mining claims, the courts have said that due diligence requires
that "the exploration for minerals should be made within a reasonable
time" and that, "The failure to make such exploration within a reasonable
time, and to make it with such thoroughness and certainty as to determine
the existence of mineral or oil, would be fatal to the agreement (claim)".
Legal requirements for "diligence" may include annual improvements to the
claim and the filing of reports and notices. Webster 3rd
An impure variety of chrysocolla containing copper carbonate.
In bituminous coal mining, a laborer who rides and attends a dilly (light
wagon, truck, or water cart) used to haul coal or water underground or at
the surface of a mine, loading, unloading, and cleaning it. DOT
a. That which dilutes or makes more fluid; a fluid that weakens the
strength or consistency of another fluid upon mixing. Fay
b. Waste rock in ore. Hess
c. In solvent extraction, the inert liquid used to dissolve the
extractant. Newton, 1
Medium of specific gravity below that in the separating bath and usually
occurring as a result of spraying the bath products for the removal of
adhering medium solids. BS, 5
The contamination of ore with barren wall rock in stoping. The assay of
the ore after mining is frequently 10% lower than when sampled in place.
See also:contamination
The weight of a specified material per foot of belt length that a belt
conveyor will transport. NEMA, 2
Any rock suitable for construction purposes, as distinguished from crushed
stone or aggregate.
Same as tetragonal system.
The property of a chemical compound to crystallize in either of two
different crystal structures, e.g., CaCO3 as trigonal calcite and
as orthorhombic aragonite. Noun: dimorph. Adj: dimorphic.
CF:trimorphism; polymorphism.
An orthorhombic mineral, As4 S3 ; orange-yellow; a volcanic
product closely related to orpiment.
An oversized derby (possibly a ton or more) of a metal produced in a bomb
reaction, such as uranium from uranium tetrafluoride and magnesium. The
term ingot for these metals is reserved for massive nits produced in
vacuum melting and casting. See also:biscuit
In its earlier form, a mineral separator to which the material was fed by
a vibrating conveyor and passed through successive zones of magnetic
influence. The zones were covered by the rims of rotating disks, which
became magnetized, carried the particles having magnetic susceptibility
out of the fields, were demagnetized, and dropped the concentrate beyond
the edge of the belt. Now made with rollers having an induced magnetism;
dried, finely crushed ore passed over the rollers in a thin stream from
which particles attracted by the magnet are drawn out.
Hess; Liddell
A yellowish hydrocarbon having a low melting temperature; in lignite.