Political and commercial geology and the world's mineral resources
Science
Political and commercial geology and the world's mineral resources
Geology, Economic; Mines and mineral resources
Indian ores are transported to the shipping ports by rail for distances
ranging from 56 miles for the Vizagapatam district to 783 miles for the
Chindwara district, with the result that freight charges are heavy.
The ports of export in order of tonnage handled are, Bombay, Mormugas,
Calcutta, and Vizagapatam. The destination of exports in 1913 was as
follows: United Kingdom, 36 per cent.; Belgium (largely to Germany), 26
per cent.; United States, 15 per cent.; France, 14 per cent.; Germany,
2 per cent.; others, 7 per cent.
In the _Japanese Empire_, in the islands of Mutsu, Echigo, Ugo, and
Nato, are irregular lenticular bodies of rather pure manganese oxides
that occur more or less parallel to the bedding of metamorphosed
Paleozoic sediments. Below water level, the oxides grade into rhodonite
and are probably derived from this mineral. The ore bodies are not
large, but many are known and they are the source of a small but
regular production. In the islands of Mutsu, Nogo, Hokkaido and Ugo
many irregular but locally large deposits of manganese oxides are
associated with highly altered volcanic tuffs and flows of Tertiary
age. Most of the deposits in Japan seem to be owned by natives in small
holdings. The maximum production of 18,076 tons is reported for 1913,
but since 1900 the range has usually been from 5,000 to 15,000 tons.
In the _Philippine Islands_, manganese occurs on the islands of Ilocos
Norte, Masbate, Bulacan, Pangasinan and Tarloc, largely as veinlets and
boulders of oxides in weathered igneous rock. On Ilocos Norte a maximum
production of 3,000 tons was attained in 1916.
=Africa.=--On the _Gold Coast of West Africa_ (a British colony), near
Dagwin, are several deposits of manganese, the largest being 400 feet
long and 70 feet wide. The concession is owned by a British exploration
company. The deposit was discovered in 1914; and from the beginning
of exploration in 1916 up to November 7, 1917, 28,465 tons had been
shipped to England.
In the _Belgian Congo_, there is manganese ore in the valley of the
Upper Fungwe River, and in southern Katanga. The deposits are too
remote from the ocean to justify exploration, but are reported to be
large. In the _Union of South Africa_ (British) several manganese
deposits are found along the sea coast, within 30 miles east and west
of Capetown. Of the seven known deposits the largest is estimated to
contain 15,000 tons. In _Egypt_, in the Sinai peninsula, are large
manganiferous iron deposits as well as small manganese deposits, but
none has been exploited. In _Tunis_, there are deposits reported to
contain 4,000,000 to 5,000,000 tons of manganiferous iron ore, and also
several manganese deposits which yielded 5,800 metric tons of manganese
ore in 1917.
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