301 BROWN & HERON : GEOLOGY AND ORE DEPOSITS OF TAVOY. 



Tata's Darichaung.— The Darichaung mine of Messrs. Tata Sons, 

 Ltd., is situated south of Steel Bros.' Paungdaw. Mining opera- 

 tions commenced in 1916, and the output has been as follows:— 



Tons. 

 1910 4 



1917 22 



1918 ' .92 



The vein ore contains very little tin and the detrital concentrates 

 carry about 5 per cent, of cassiterite. There are a number of thin 

 veins in the area which strike north 15° east, south 15° west and 

 dip from 50° to 80° towards the east. The country rock is granite, 

 and in the rainy season ground-sluicing is carried on in its decom- 

 posed portions. The veins carry mica and have greisen walls. 



Steel Bros: Crest.— The Crest mine of Messrs. Steel Bros. & Co.. 

 Ltd., lies to the west of the one which lias just been described. A 

 broad tongue of sediments crosses it from north to south, otherwise 

 it is entirely in granite. It was opened in 1910. and has produced 

 the following amounts of concentrate :— 



1918 



1917 

 1918 



Tons. 



25 



:*7 



48 



The concentrates average about 12 per cent, of metallic tin- 

 There are a number of thin veins near the contact in the eastern 

 portion of the area which possess the strike and dip characteristic 

 of this region, but most of the output has come from the surface 

 deposits, which are treated with water raised from a small dam 

 by a Worthington pump driven by a 16 h. p. Better oil engine. 

 The high granite peak, Nwalabo (0,063 feet above sea, level)." lies 

 in the extreme south-western corner of the Crest concession and 

 prospecting has recently been carried on around it. Many quail/, 

 veins were found on all the slopes examined but only those on one 

 ridge were at all promising. Here, at an elevation of 4,400 feet 

 above sea level, two veins about 2\ and l\ feet in thickness were 

 opened up along their outcrops and yielded some wolfram. These 

 workings are the highest in the whole district. 



London Burmese Co:s Paungdaw.— The Paungdaw mine of the 

 London and Burmese Wolfram Co., Ltd., is the last to be described 



