The A B C of Mining: A Handbook for Prospectors — John Shaqi
The A B C of Mining: A Handbook for ProspectorsBramble, Charles A.
Science
The A B C of Mining: A Handbook for Prospectors
Bramble, Charles A.
Mining engineering; Prospecting
The prospector of to-day is often a very different man from his
predecessor of a generation ago. The old gold hunter used to sally
forth armed with a pick, shovel and pan, and usually a very little
grub. In his stead men are now taking the field who have had the
benefits of a thorough education, both practical and theoretical, and
provided with all the equipment necessary for their work. Some of
these men carry an outfit somewhat as follows: An iron mortar holding
half a gallon, together with a pestle a rough scale for pulp, a more
delicate one showing troy grains and pennyweights, a 40-mesh sieve, a
burro furnace and muffle, one cupel mould, a couple of dozen
scorifiers, tongs to handle the cupel and scorifiers, two annealing
cups, a spirit lamp, a dozen test tubes, a pouring mould, five or six
pounds of borax and about as much carbonate of soda, five pounds of
bone ash, ditto of granulated lead, a pint of nitric acid, ditto of
hydrochloric acid, ditto sulphuric acid, ditto of ammonia, twice as
much alcohol and two pounds or so of granulated zinc.
As a blow pipe outfit he will take a blow pipe, spirit lamp, nitrate
of cobalt in solution, cyanide of potash, yellow prussiate of potash,
red prussiate of potash, a sheet or two of filtering paper and a
couple of three-inch glass filters. With this outfit he can determine
any mineral he may come across.
By patience and observation the man who starts out to take up
prospecting as a road to fortune may easily master the rudiments of
his business. It will not take him long to become familiar with the
commoner rocks, and the more valuable ores. His own rough tests in the
field must be confirmed by competent assayers upon his return to
civilization, and in this matter he should be very guarded. The most
reliable assays are made either at the different government assay
offices or by some of the large metallurgical works whose reputation
is world wide. Prospecting is hard work, but the life is healthy and
full of excitement, only the explorer should have courage, hope, and
good temper, for each and every one will be as necessary in his chosen
vocation as his pan and pick.
When alluvial or placer gold has been found it is reasonable to
suppose that the vein from which it was derived may also reward
diligent search, for it is undoubtedly true that most placer gold has
come from quartz veins. This, however, is believed not to be
invariably the case, a recent school of mineralogists contending that
pure masses of alluvial gold have been formed from the accretion or
growth of the gold deposited from certain gold salts. This is in any
case probably exceptional, and the prospector who finds gold in gravel
should seek in the adjacent country for the quartz lodes from which it
came.
Important deposits may be expected at or about the line of
unconformability where slates, shales, quartzites, sandstones,
limestones, schists and other sedimentary deposits are pierced by
intrusive masses of igneous rocks.
Public-domain text, read in full here on John Shaqi.
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