Nigeria and its tin fieldsCalvert, Albert Frederick
History
Nigeria and its tin fields
Calvert, Albert Frederick
Tin mines and mining -- Nigeria
_Tin Recovery._—Work ceased on the 14th instant owing to Mr. Carpenter’s
time being completed, and his desire to return to England; otherwise
sluicing on No. 1 stream could have continued to the end of the year.
Sluicing on No. 2 stream was stopped early in November owing to want of
water.
The black tin recovered for November amounted to 12 tons and 2 lbs.,
and from December 1st to 14th, 4 tons 14 cwts. 3 qrs. 12 lbs., making a
total of 30 tons 0 cwts. 1 qr. 3 lbs. for the three months that mining
operations have been carried on, as shown on the summary.
The ground sluiced at No. 1 stream measures approximately 2,736 cubic
yards, worth 10 to 11 lbs. of black tin per cubic yard.
In arriving at these figures, the tin taken from the actual river bed,
where it was impossible to measure the ground sluiced, is excluded, and
this value will be found to be a fair average for the alluvial bank
deposits on the N’Gell areas.
I estimate there is sufficient of this to last for six years on the two
areas we have taken up, but this does not include some fairly extensive
deposits between the three N’Gell streams and outside our small mining
leases, which we have recently found to exist. We have not attempted
to develop these higher deposits, but wherever tried they carry good
values, and if by careful selection we added them to the existing areas,
the proposition would become an important one as far as quantity is
concerned. The difficulty lies in economical working. The present method,
although profitable, is unsatisfactory, at any rate from an engineering
point of view; my experience of the last three months has proved that
sluicing in a small way can only proceed between seasons—in the dry
season only hand-work can be done, and at the height of the rains the
sluices cannot be fixed low enough to receive the sluicing water. It
is essentially an elevating proposition, but without power, fuel, or
water, we are helpless. I therefore recommend you, should an opportunity
occur, to give careful consideration to any amalgamation scheme which our
neighbours on the N’Gell River might think desirable after they become
familiar with their property, especially if they decide to work on a
large scale.
Should no opportunity of the kind occur, I advise you to take the best
out of the three streams and their alluvial banks by our present cheap
sluicing methods and handwork during the next six years or so. A good
engineer and an assistant would be required to supervise, but the former
would only be required at certain seasons and not permanently on the
property. I am preparing a list of plant required to work economically on
these lines on the three streams.
_Export._—The tin won was all first grade, assaying 72 per cent. to 73
per cent. 644 bags, weighing net 19 tons 9 cwts. 3 qrs. 7 lbs., were
despatched in November, and 350 bags, weighing net 10 tons 10 cwts. 1 qr.
24 lbs., were despatched this month, making a total of 30 tons 0 cwts. 1
qr. 3 lbs.
Public-domain text, read in full here on John Shaqi.
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