STRUCTURES AND CHARACTERISTICS OF TUNGSTEN DEPOSITS. 235 



Mr, N . P. Ghandi, Paungdaw and Padavh. — " I have not got 



sufficient data to pass an opinion, but am inclined to believe 

 that wolfram occurs in shoots in the veins." 



Mr. M. M. Sinclair. Egani. — ! * My experience on this property 

 is that both wolfram and tin-stone occur in bunches ns 

 regards the greater bulk of them, but both minerals are 

 also disseminated throughout the veins in small quantities." 



Mr. A. (1. Wood, BoUniaung. ' I am certainly of opinion 

 that wolfram occurs in shoots in the veins. In all the 

 cases which I have, observed the ore is found in defined 

 zones with barren bars between them, but these mineralized 

 zones do not, individually, constitute any considerable length 

 on the strike of the veins." 



Mr. Malcolm K. Clarke, Ilcinda. — " In my experience of mining 

 both for wolfram and tin-stone neither occur, to my 

 knowledge, in shoots. 1 should be more inclined to call 

 them rich patches or pockets. These certainly have been 

 met with and do occur. Cases of this kind have been my 

 experience here when certain adits have met with rich 

 patches, extracting over \ of a ton of wolfram, while the 

 intervening spaces of the reef carry the mineral in more 

 or less small percentages and sometimes hardly at all. 

 These pockets are not frequently met with, neither are 

 they at regular intervals. Drives below and above on the 

 same reef fail to meet the continuation of these rich pockets 

 at distances where they should if shoots occurred. 1 

 therefore assume that wolfram does not occur in shoots 

 in the veins themselves, but in pockets or rich patches 

 apart from being distributed throughout the vein in greater 

 or lesser quantities." 



The outcrops of quartz veins are not well-defined in Tavoy and 



the prospector receives little help either from 

 Outcrops of veins. _. . . 



outstanding exposures or from hollows Left by 

 the decomposition of the veins themselves. Both in granite and 

 in sedimentary rocks the veins break down under the influence 

 of denudation at much the same rate as the enclosing rocks them- 

 selves, owing partly to their " blocky " character, and partly as a 

 result of friability caused by the decomposition of soluble minerals. 

 The thick so ; l cap and d«mse vegetation together form a very efficient 

 mask, and it becomes impossible to know whether any particular 



