088 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IY : 
W. It is on the line of strike of the KajHclongri deposit, the S.E. end 
of which is about If miles to the N.N.W. That these two are prob- 
ably genetically connected is also indicated by the outcrop at Piploda, 
about half way between them, of some pyrolusite and psilomelane formed 
by the replacement of quartzite and also of a little spessartite-quartz- 
rock. 
The few pits that had been made along the strike of the Rambhapur 
deposit showed that the manganese-ore forms a bed composed of alter- 
nating layers of ore and red quart.cite. This is folded 2 or 3 times and 
might be as much as 20 feet, but is probably not more than 10 
feet, thick. Owing to the folding the dip is variable, being in some places 
to the N.E. side of the strike and in others to the S.W. side. The 
' country ' is a siliceous crystalline limestone with abimdant secondary 
pyrolusite replacing both calcite and quartz. 
The tramway connecting Kajlidongri to Meghnagar crosses this 
deposit so as to divide it into two portions. T took two samples, one 
(A. 42) from the stacks to the S.W. side of the tram-lines and the 
other (A. 43) from those to the N.E. side, so as to represent roughly 
the northern and southern portions of the deposit respectively. A. 42, 
representing about 120 tons of ore, consisted of dirty ore, usually a 
mixture of pyrolusite and psilomelane, showing spessartite in places and 
with small calcite veins in several pieces. A. 43, representing about 
35 tons of ore, consisted of much harder ore — psilomelane and braunite 
with less calcite and more visible quartz. The analyses (by J. and 
H. S. Pattinson) are as follows : — 
Sample 
Sample 
No. A. 42. 
No. A. 43. 
Manganese peroxide .... 
.^3-77 
47-71 
Manganese protoxide .... 
13 29 
20 -.3.5 
Ferric o-sids ...... 
H-2S 
8-37 
Baryta ...... 
I -PS 
2-20 
Silica (combined) ..... 
4-25 
5-9.5 
Silica (free) 
1-60 
5-30 
Phosphoric oxide ..... 
0-42 
0-.38.') 
Water (combined) ..... 
3-40 
2-50 
Moisture at 100° C 
0-75 
0-55 
These are equivalent to : — 
Manganese ..... 
44-29 
45-92 
Iron .... 
7 • 90 
5-86 
Silica (total) 
.5-85 
11-25 
Phosphorus ..... 
0-183 
0-168 
