27G BROWN & HERON: GEOLOGY AND ORE DEPOSITS OF TAVOY. 



notes supplied by Mr. Arthur (J. Wood, .Mining Engineer to 

 Messrs. Bulloch Bros. & Co., Ltd. 



The general strike of the Bolintaung veins is a north and south 

 one with a variation to the east of north of from 1 J to 22°. The. 

 dip is usually to the east and is high, from 77 to 87° with the hori- 

 zontal. There are however eases of veins in certain sections of the 

 property which vary greatly from the general direction. Thus 

 in North Camp section two veins have strikes of N. 80° W. and 

 N. 89° W. and high dips to the north. These veins are about I 

 foot and 2 feet thick respectively. Speaking generally these cross 

 veins are of hard, vitreous white quartz and. with one exception, 

 are not productive. The average width of the normal veins is from 

 2 to 3 feet. Mr. Wood slates that in the cast 1 of the North Vein, 

 which varies in width from 2.1 to L| feet and strikes N. 14° E. 

 some of the richest ore from the opencut workings was extracted 

 at points in the vicinity of the intersection of the cross veins. 

 Altogether six veins were being developed in L918. 



Byaukchaung. — The largest mine oh this intrusion north of the 

 Talaingya stream is Byaukchaung, the property of Tavoy Conces- 

 sions, Ltd. 1 It was opened in L913 and is now held under a mining 

 lease of <>1<> acres granted for a period of 30 years from L917. It 

 has produced as follows : — 



Tons. 



1011 10 



1912 ;;i 



1913 ... (i:5 



mil 7i 



1915 41 



1910 BO 



1917 72 



1918 17 



The concentrate is a high grade wolfram product averaging 

 about 5 per cent, metallic tin and (if per cent. W0 3 . There are 

 a few veins on this mine but they have never proved profitable 

 to work. On Monitor Hill there are two in granite varying from 

 2 to 5 feet in width, of short extensions, vertical dip, and striking 

 TS.E.-S.W. On the Ninhla hill a narrow quartz vein with greisen 

 walls strikes N. 20° E. and S. 20° W. and has a vertical 

 <iip. The longest vein on the Dapho hill strikes N. 10° E., S. 10° 

 W., but it is not a well-define' fissure The chief characteristic of 

 Byaukchauug is the extensive met in orphism and extreme minera- 



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