The History of Cuba, vol. 5Johnson, Willis Fletcher
History
The History of Cuba, vol. 5
Johnson, Willis Fletcher
Cuba -- Economic conditions; Cuba -- History
Both chrome and manganese are scattered throughout various sections of
Oriente and the largest deposits of these minerals as well as those of
iron are located in this Province. Small deposits of chrome are located
some seven miles northeast of Holguin, on the slopes of a low ridge of
serpentine that lies between two higher ridges of steeply inclined
limestone, about a half mile distant from each other. One pocket had
yielded about 150 tons of ore, which with 25 tons of float was ready for
shipment in March, 1918. Analysis of samples showed an average of 34% of
chromic oxide. The maximum content of chromium in pure chromite is
46.66% and the content of chromic oxide is 68%. Late in July of that
year the company’s consulting engineer reported that a large body of 40%
ore had been developed, and that in all about 500 tons were ready for
shipment.
One of the larger deposits of chrome that gives promise of a
considerable output is located on the south slope of the Sierra de Nipe,
about seven miles southeast of Woodfred, the headquarters of the Spanish
American Iron Company’s Mayari mines. The upper part of the ore body
crops out of a steep hillside about 300 feet above a mountain stream,
flowing into a small tributary of the Mayari River, and seems to be from
ten to thirty feet in thickness. Where it does not crop out, it lies
from 30 to 50 feet below the surface. The ore varies in quality, the
better grade carrying as high as 48% of chromic oxide, with 7% to 15% of
silica, and 7% to 10% of iron. The deposit was estimated to contain
about 50,000 tons of chrome ore, 25,000 tons of which would carry more
than 40% of chromic oxide and the remaining 25,000 tons between 34% and
40%.
The Cayojuan group of chrome ore claims are located on both sides of a
small river emptying into Moa Bay, and lie at an altitude of about 750
feet above the sea level. An outcrop that extends around the hill for
about 300 feet, and covers some 6,400 square feet, has been prospected.
Samples on analysis gave an average of 38.1% chromic oxide.
The Narciso claim, which nearly surrounds the above group, includes an
ore body that crops out on a steep hillside, about 500 feet above the
river. A sample of ore from this outcrop showed an analysis of 34.8% of
chromic oxide.
The Cromita claims, one the left side of the river, contain three known
ore bodies, and hundreds of tons of boulder float ore, in an arroyo or
gulch. The ore bodies are exposed on the side of a bluff at a height of
150 to 300 feet above the river. The most northerly ore body shows a
face 20 feet wide and 15 feet high. The middle body includes an outcrop
75 feet long and 50 feet high and has been penetrated by cutting a
tunnel. Geological conditions would indicate that these bodies are
connected within the hill. Samples of these ores on analysis varied from
26% to 40.5% of chromic oxide.
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