300 BROWN A HERON: GEOLOGY AND ORE DEPOSTTS OT TAVOY. 



Steel Bros.' Putlelto. — This mine adjoins the one just described, 

 OH the south-east. It was opened in L913 and has produced the 

 following amounts of concentrate : — 



Tons. 



l 1013 89 



1 1914 88 



1916 n a, 



1916 14 



1917 ID 



1918 .»,) 



The average content of metallic tin is about per cent. 



The workings are situated on the extremity of a high and narrow 

 granite ridge, a north-eastward trending spur of Oktu Taung, with 

 precipitous slopes descending to the ravines of the Putletto and 

 Oktu dialings on either side. These ravines are occupied by sedi- 

 ments of the Mergui Series with apparently almost vertical contact 

 surfaces against the granite, and the spur itself runs out from below 

 the capping of sediments on Oktu Taung, with an outlying patch 

 of them near its outer end. About 20 veins of good size and value 

 have been located, but they are discontinuous and much disturbed ; 

 for this reason and because of the hardness of the enclosing granite, 

 underground mining was suspended temporarily and operations 

 confined to open-cutting and ground-sluicing. One of the veins, 

 the "Rear Lode," is in some places 10 feet broad and one of the 

 widest bearing-veins in the district. The general strike is from 

 north and south to north-east, south-west, but both strike and dip 

 are irregular. Outside the granite margin there are one or two 

 veins in sedimentary rocks, but they have not been worked to any 

 extent. 



Widncs.— South of the Putletto mine just described lies Widnes 

 mine, the property of the High Speed Steel Alloys Mining Co.. Ltd., 

 by whom it was purchased from Quah Cheng Guan in 1916. Its 

 production has been as follows : — 



Tons. 



l!)l"> 283 



191fi 424 



""' '. .ir.s 



1918 . ;} 80 



1 Includes the production of the Putletto Mining S\ rrlicate's mine as well. 



