900 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
and yellow, trapezohedra of the manganese-garnet, yellow being the 
predominant colour at this locality. These trapezohedia are sometimes 
as large as Ij inches in diameter, have their faces striated parallel to the 
faces of the rhomb-dodecahedron, and show a concentric sheUy structure 
on fractures. The large spessartites are often set in matrix of rather 
glassy quartz. Some of these spessartite-rocks contains a soft chocolate- 
brown fibrous mineral, possibly an altered amphibole. 
The quality of the ore did not seem good, and except in the driest 
weather it would be necessary to put in a pump to 
Quality of the ores, remove the Water. Mr. H. D. Coggan, however, has 
given me the following figures representing the 
average analysis of the ores raised from this deposit during 1905 and 
1906 :— 
Silica 
1905. 190(5. 
51-74 1 52-00 
6-80 1 6-30 
0-112 0-C68 
The quantity of ore extracted in the years 1904 to 1907 is, according 
Output. to Mr. Coggan ;— 
Year. 
Long tons. 
1907 ...... c .. . 
1,598 
Separate figures were not kept before 1904. 
Between this pit and the village a series of pits had been dug over a 
length of some 150 yards in an east- south-east direction, and since partly 
filled up, becaus-d they spoilt the village cattle -grotmd, and because the 
ore found was not of sufficiently good quality to make 
(Jther occiurences. . i i .i . i ^ ^i ^ 
it worth while compensating the malguzar or village 
landlord for this piece of land. The dips seen at various points were 50° 
to 60° to S. 10° W. and very steep to S. 22° W. In one place the ore- 
band was at least 24 feet wide, but this width included some interlamin- 
ated fine-grained mica-schist and a large amount of garnetiferous ore. A 
very interesting rock obtained from this pit is a white felspar-rock com- 
posed of orthoclase (?), microcline, and plagioclase. It contains a few 
crystals of idiom orphic spessartite and is undergoing replacement by 
manganese oxides in a manner very similar to the replacement seen in 
the Garbham and other mines in the Vizagapatam district. In other 
places there are bands of quartzite in the ore. The ores are of both the 
soft and haid facetted varieties noticed above. 
