860 
MANGANESE DEPOSITS OF INDIA : DESCEIPTIVE. [pART IV : 
would lead to the discovery of further localities for these rooks, with 
the prospect of some of them containing merchantable manganese-ore. 
4. Risapa (Reechhara). 
There are three occurrence? of manganese-silicate-rocks and mangan- 
ese-ores near this village. The first spot is a little over i a mile north by 
east from Risara, about 50 yards west of a water-course and 150 yards 
south of the boundary of the Government Forest to the north. Here 
had been collected a pile of fragments of mixed spessartite and mangan- 
ese-ore, while two or three blocks of similar rock seemed to be in situ in 
the ground. The rocks seen in the nala to the east of this deposit are 
acid gneisses. The second outcrop is a little over -J mile north-east from 
the village. This outcrop strikes west-south- west and at its south- 
'vest end crosses a nala. It is 50 yards long and 17 wide and consists of 
rine-and medium-grained spessartite-rock of yellow and grey colours, 
which is altered in patches to manganese-ore, and shows quartz both in 
patches and bands. There is also in places rose-pink rhodonite super- 
ficially blackened to a depth of | to 1 inch. A small amount of mangan- 
ese-ore of second-grade quality occurs in places. The ' country ' of this 
deposit is not visible, but a little to the west there is an outcrop of yellow- 
ish pink crystalline limestone striking E. 5° N., vertical. 
The third outcrop is some J mile S. 30° E. from the second, and on 
the other side of a nala. It is j^bout | mile east-north-east of the village. 
This outcrop is found on a hillock perhaps 30 to 40 feet high and some 
350 yards long, and strikes W. 20° N. The portion carrying mangan- 
ese-silicates and ores is about 100 yards wide at the broadest part. The 
manganiferous rock consists of the usual spessartite-quartz-rock, in which 
the garnet varies in colour from yellow to grey and brown. When 
there is plenty of quartz present the rock is hard ; but when mostly of 
spessartite it is friable. The garnets are not usually more than -^^^ 
•i^ inch in diameter. In places the rock has been converted into man- 
ganese-ore, but nowhere did I see a single piece of marketable quality. 
At the west end of the hillock, the ' country ' on the north side is biotite. 
felspar-schist, but towards the east end v/hite quartzites crop out on both 
sides of the spessartite-bearing rocks. 
None of the three outcrops noticed above can be considered to be of 
any economic value, if one can judge from outcrops. 
k sample taken from this locality by Messrs. Ogilvy, Gillanders and 
Company was analysed by Mr. E. Riley of London with the following 
result ;! — 
Per cent. 
Manganese . . . . 34-68 
Iron 2-26 
Silica 23-46 
Phosphorus .... 0 -43 
Moisture 1-02 
1 Published with the kind periuissiou of -Messrs. Ogilvy. Gillanders and Company. 
