Nigeria and its tin fieldsCalvert, Albert Frederick
History
Nigeria and its tin fields
Calvert, Albert Frederick
Tin mines and mining -- Nigeria
_Nafuta or Sub-Juga._—Of the exclusive area held here some 1,850 acres
have been embodied in the mining lease just issued. It embraces what
appears to be the pick of the Nafuta flats and encloses a maximum of
alluvial drift with a minimum of rock, and at the same time adheres to
the water-course. The Nafuta gorge terminates quite abruptly, and opens
in an expansive plain lying some 400 feet below. The lease commences
at the foot of the gorge, and runs along the river in a north-easterly
direction. Its width embraces the deepest of the flats, though there is
still some ground at the south-west corner of the exclusive area that
warrants attention. I should say from a cursory examination that the
amount of workable ground is in excess of that of the other leases,
though no attempt can be made to quote tonnage until many more pits have
been sunk. It is from this area that most of our present tin is being
won. The tin contains much impurity, such as iron, and the natives find
a difficulty in separating it by calabashing.
The average depth, judging by the present trial pits, is 12 feet. The
wash is clear and medium sized, and the overburden is ideal material for
removal where viewed in the old paddocks.
I see no difficulties in it as a gravel sluicing proposition, once
provision is made for power. The lease carries no timber, and is a power
consideration from the beginning.
Of tin value I can quote last week’s winning of 4,000 odd lbs. of crude
tin by 120 men with calabashes, and this too in the face of many weather
difficulties.
A site has been set aside for a native village, and already people are
congregating and erecting their grass huts.
_South Juga._—This lease, as its name implies, lies south of Juga. It
covers 855 acres, and is approximately 4 miles long by 2,000 yards wide.
It is traversed for its entire length by the track which leaves the
Toro-Bauchi road and comes on to Juga. The lease is narrow—it lies in
a long gully, and appears bound by a succession of rocky bars. These
no doubt may be acting as excellent natural tin savers, but they will
make work very irregular. Of the tin value here I cannot speak with any
definiteness. I have not traversed the ground in detail, and as no pits
have been sunk upon it, I have no samples to guide me. It will have my
attention so soon as I can get one lease into a regular producing stage.
Public-domain text, read in full here on John Shaqi.
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