Number of resettable diamonds salvaged by cutting out of worn or used
diamond bit. Long
a. The net worth of diamonds recovered from a used or worn diamond bit or
other diamond-inset tool. Long
b. The net worth of on-site equipment, and tangible assets after a mine
has been closed.
An important iron ore deposit in Germany. It consists of conglomerated
oolitic limonite and contains about 30% iron. Osborne
A bright, silvery, lustrous, metallic element of the rare-earth group.
Symbol, Sm. It is found along with other members of the rare-earth
elements in many minerals, including monazite and bastnasite, which are
commercial sources. Used for carbon-arc lighting for the motion picture
industry, for permanent magnets, and in optical masers and lasers.
Handbook of Chemistry and Physics, 3
Sm2 O3 has a melting point of 2,350 degrees C. This material
has a high thermal neutron cross section, making it usable as a nuclear
control rod material. It is also used as a phosphor activator. Lee
A monoclinic mineral, (Y,Ce,U,Fe)3 (Nb,Ta,Ti)5 O16 ;
commonly metamict; in granite pegmatites. Syn:ampangabeite;
uranotantalite.
Artificially produced silicon carbide or carborundum.
a. Representative fraction of body of material; removed by approved
methods; guarded against accidental or fraudulent adulteration; and tested
or analyzed to determine the nature, composition, percentage of specified
constituents, etc., and possibly their reactivity. Bulk samples are large
(several tons), so taken as to represent the ore for the purpose of
developing a suitable treatment. Channel samples, cores, chips, grab,
pannings, stope samples, etc., are small ones-- made primarily to
establish the value of the ore reserve. Pryor, 3
b. A section of core or a specific quantity of drill cuttings that
represents the whole from which it was removed. CF:borings
Long
In mine valuation and process control, devices that cut a representative
fraction from a pile of ore or from a passing stream. Pryor, 3
A mechanical device for removing a soil sample from a sampling tube;
usually consists of a piston driven by a jackscrew or a hydraulic
mechanism. Long
One who grinds samples of ore to required fineness (depending on character
of ore) to prepare them for analysis by assayer. Also called sample
crusher. DOT
An orthorhombic mineral, NaCaCu5 (PO4 )4 Cl.5H (sub
2) O ; forms crusts of minute blue crystals.
a. Strip of graph paper showing units of depth on which the geologist,
using cores and samples, describes the rock formations penetrated by
drilling. Wheeler, R.R.
b. Syn:drill log
c. A log depicting the sequence of lithologic characteristics of the rocks
penetrated in drilling a well, compiled by a geologist from microscopic
examination of well cuttings and cores. The information is referred to
depth of origin and is plotted on a strip log form. See also:well log
AGI
In coal and coke sampling, the process whereby an analysis sample is
obtained from a sample by particle size reduction, mixing and sample
dividing in successive stages. A stage of sample preparation refers to the
sequence of operation leading up to a sample division. BS, 2
a. A mechanical device for selecting a certain fractional part of ore to
be used as an assay sample; as, for example, split shovel, riffle sampler,
Brunton's mechanical sampler, and Vezin's sampler. Fay
b. An instrument designed to take samples of the flame or other explosion
gases at predetermined intervals during an explosion. Rice, 2
c. A specific device for recovering samples of overburden.
See also:sampler barrel
d. One whose duty it is to select and prepare samples of materials and
products for an assay or analysis. Fay
As used in soil-testing work, one of several tubelike devices used to cut
and recover a core sample of soil or soft rock. It can either be a plain
tube designed to be driven or pressed into the formation being sampled, or
be equipped with cutter heads and helical flutes for taking the sample by
rotary methods. Syn:sampler tube
Reducing a soil, coal, or other sample to manageable size while still
obtaining a representative sample. The methods may be divided into manual
(for example, quartering) and mechanical; riffle box. Nelson
An adapter or sub for attaching a sampler to a drill-rod string.
Long
A thin-wall tube fitted inside the barrel of a sampler. The liner serves
as a retainer for the sample and when sealed at either end is used as a
container in which the sample can be transported safely.
Syn:sampler tube
See:sampler barrel; sampler liner.
A device for separating dry incoherent material (such as sediment) into
truly representative samples of workable size for laboratory study.
Syn:riffler