exe Proceedings of the Asiatic Society of Bengal. [N.S., XV, 
Although as shown above, I am inclined to look for the ultimate 
source of the gold in the acid intrusives, it is not in the least 
impossible that the later basic intrusions may have led to some 
subsequent re-arrangement, with possible further concentration, 
in some cases, of mineral contents already contributed to the 
Dharwars by the granites. 
Accepting as a working hypothesis the view that most of 
the epigenetic ore-deposits in the Dhar- 
wars of Singhbhum owe their origin to 
the intrusion of the granites, we may briefly notice the evi- 
Order of deposition. 
: ay 
the pegmatites than to the other deposits. Where the magnet- 
ite-apatite-rocks and copper deposits occur to ether, the 
chalcopyrite is found to replace metasomatically the magnetite 
and the apatite. In the magnetite-apatite lenses themselves 
the magnetite is later than the apatite. The uranium 
c 
belt, we should attribute a slightly later age to the wolfram. 
This would be a reversal of» what is customary in other 
countries, e.g. Cornwall, and’ the position of the wolfram 
deposit may be explained in two ways: either the wolfram 
