THE PAUNGDAW GROUP. :ui 



The concentrates from the veins carry 1 per cent, to 3 pel cent, 

 of metallic tin while the detrital material probably averages about 

 5 per cent. 



The eastern portion of the lease is built up of granite emerging 

 from under a sedimentary capping on Oktu Taung, at elevations 

 of 2,500 to 2,700 feet, deeply dissected by the narrow ravines of 

 the Oktu and Wazwinchaungs and their tributaries and standing 

 high above the main sedimentary area further east, where the 

 altitude attained by the Mergui rocks in the vicinity is not much 

 more than 1,000 feet. The outer margin of the granite is com- 

 paratively straight, the inner one is sinuous and complicated, for 

 the reasons already advanced in the case of the Putletto Milling 

 Syndicate's mine. The Widnes granite is part of a broad dome- 

 shaped intrusion from which but little material has been removed 

 by denudation. This is proved by the presence of thin residual 

 cappings of argillites which still remain in situ here and there. 

 It is more comparable in structure with the Eermyingyi type of 

 intrusion, than with those narrower and steeper-sided occurrences 

 which rise to a higher level, but in which the veins themselves tend 

 to be shorter, more disturbed and discontinuous. 



Up to the advent of the Company the property was worked 

 entirelv by ancestral Chinese methods and great credit is due to 

 Dr. W. R. Jones, the general manager. Mr. II. X. Rees, the mine 

 manager, and those associated with them, in keeping op a high 

 level of production during the war. and. at the same time, succeeding 

 in carrying out development work which has had far-reaching effects. 

 The mine is divided into four sections known as Anauktaung, 

 Aletaung, Shamataung and Kalataung. On the Anauktaung at 

 least seventeen veins are known. Their general strike is north 

 15° east and south 15° west and the dip about 62° to the eastward. 

 These veins are partly in granite and partly in the overlying sedi- 

 ments, though some of hem do not persist beyond the granite 

 contact. A main tunnel, No. 1, was put in at right angles to the 

 strike of this series of veins and about 200 feet vertically below 

 their outcrops. Another main tunnel, No. 3. enters the series 

 60 feet below No. 1. A large number of veins, all carrying good 

 values, have been cut and most of them have been driven on, while 

 rises and winzes have prepared the ground for stoping. The com- 

 pressed air used for driving the machine drills comes from a small 



