786 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaBT IV : 
length exposed was 158 feet. At the west end there were a few small 
pegniatitic intrusions, and at the north-east corner a much larger <.ne. 
This varied from very coarse-grained felspathic rock (felspar up to 
2 inches long) to comparatively line-grained rock suggesting a medium- 
grained granite in texture. Much of tlie felspathic intrusions in 
this quarry contains either braunite or a pyroxene. On the south 
side of the east end of the quarry there was exposed a big mass of soft, 
very schistose, micaceous gneiss, apparently faulted into the ore-bodv. 
Its strike and dip were roughly at right angles to that of the ore-body 
on either side of it. 
The ores are coarsely crystalline and composed of a mixture of six 
I minerals. Of these one is a pale pinkish white 
to white arsenate (with phosphate), for which see 
page 218. Another is the bronze-coloured micaceous mineral which 
I have provisionally designated manganchlorite (see page 195). The 
other four are nianganese minerals containing high percentages of man- 
ganese. One is braunite, an analypis of which is giA'^en in Part I (page 
76). It occurs in lustrous black granules, which sometimes show 
faces that may be interpreted as those of the tetragonal octahedron, 
there being occasionally a small truncating basal plane. Another is a 
crystalline manganate occurring in rough prismatic crystals that do not 
show definite crystal faces, probably owing to lack of freedom during 
growth of the mineral ; this mineral is closely allied to hollandite and 
mav be provisionally included under that species, although it contains 
a considerably higher percentage of calcium than the typical hollandite 
of Kajlidongri (see pages 87 — 91). The third of these manganese ores is 
pijrolusitc in pseudomorphs showing the outward form of manganitel. 
It is not abundant. The fourth mineral, sitaparite, is a dark grey one 
with a bronze tinge suggesting that it is the same as vredenburgite 
found at Beldongri in the Nagpur district. The difference between the 
two minerals lies in the fact that whilst vredenburgite is strongly 
magnetic the Sitapar mineral is only slightly magnetic ; also, the Sitapar 
mineral contains 6 per cent, of lime. As shown on page 50 this 
mineral is composed essentially of oxides of manganese and iron, the 
percentage of iron being high, namely about 19 To this mineral 1 
ha"*'e given the name sitaparite after the deposit. 
This deposit is worth a special visit to see the ores as quanied. 
The most characteristic ore is a sparkling, coarsely to rather finel}^ crys- 
1 Rec. G. 8. I., XXXIII, p. 2.32, (1906). 
