MINKS OF TH10 BOLINTAl'NG-BYAUKCH AUNG RANGE 277 



iisation of the granite. The concentrates are won by sluicing the 

 decomposed ground in situ and they come from innumerable short 

 stringers and greisen bands which penetrate the granite at all angles 

 and in all directions and have consequently enriched the surface 

 deposits wherever the granite occurs. Instead of forming fissure 

 veins as is usually the case, the mineralising agents seem to have 

 permeated the whole rock and it is interesting to note that this 

 has taken place only in the immediate vicinity of the contact. 



The greater part of the output of this concern is obtained in 

 the rainy season when water is abundant, though the long flume 

 line now under construction will enable water to be delivered to 

 the working places for a longer period during the dry weather than 

 has been the ease formerly. A small pumping installation driven 

 by a semi-Deiscl oil engine is also used to supply water for sluicing 

 during the dry season. 



The granite ranges in the Byaukchaung lease rise to over 2.000 



feet above sea level. 



Kalonla.— The Kalonta mine of Tavoy Concessions, Ltd., 1 lies 

 on a small granite boss of its own, two miles further east up the 

 valley of the Talaingya from the main intrusion. The smaller and 

 larger intrusions are probably connected underground as there is 

 great similarity in structure, appearance and in the changes which 

 both the Byaukchaung and Kalonta granites have suffered both 

 as a result of mineralisation and of atmospheric decomposition. 

 Both vein mining and surface operations are carried out at Kalonta, 

 the veins outcropping in a greisenised granite hill known as Adit 

 Hill. The hills surrounding it are all capped with argillites and 

 it is evident that the structural conditions are again very favour- 

 able, in that the original outer layers of the boss are left and that 

 it has undergone but little denudation. 



The original prospecting license was granted in 1 ( .)10 and a 

 mining lease over 1,092 acres followed in 1917, for a period of 30 

 years. Output has been as follows : — 



' Tons. 



1911 2 \ 



IW2 4 



1913 :,. 



1914 g 



1916 ; ( 



1017 ...•••••• Ji 



1<J18 14 



1 Now Burma Finance and Mining Co., Ltd. 



