MINKS OF THE FBONTIEB RANGE. 273 



The strikes and dip of the vein- are given in bhe following list: — 



B win Btrikea :>1 north of woai and dips vertically. 

 (; t 33° ,. .. 7(» to the north -east. 



jj m ;{7° ,, .. 70° to south-west. 



g M 43° ,, ,, 70° to south- west. 



F ,, 31° ,, ,, 70° to south-west. 



H m 24° ,i •> 80° to north-east. 



K „ 30 ., •• 80° f ° north-cast. 



Minor faults have been met with in the workings but they need 

 not be described here. The veins tend to be thin and the greater 

 amount of the ore, both wolfram and cassiterite, occurs in bunches. 

 Parts of some of the veins contain felspar and are thus pegmatites. 

 The associated vein minerals are sulphides of iron and copper with 

 fluor Bp»vr. The veins arc being systematically opened up and a 

 small prospecting stamp battery driven by steam has been erected. 



The alluvial deposits at Egani contain cassiterite and are now 

 being tested. The ordinary detrital concentrates are high in tin 

 values which Bometimes rise fco 25 per cent, of metallic tin. 



From the latitude of Egani the Coastal Range continues more 

 or less directly south to Tavoy Point where it disappears under the 

 sea, re-appearing again in Tavoy Island and other islands of the 

 .Mergui Archipelago further south still. No mineral veins of any 

 economic importance have been found in it, though a wolfram-bearing 

 quarto vein is known to occur high up in the granite range opposite 

 the village of Thebon, and another in a low. hill of sediments in the 

 Tawshe rubber garden, both of which places are within a few miles 



of 'Ia/oy. 



It is a matter for speculation why more veins have not been 

 fourc : in the southern extension of the Coastal Range. It has 

 certainly received attention from prospectors, as it is the moat 

 accessible of all the granite intrusions of the district and is bordered 

 by the thickly populated portion of the Tavoy plain along its entire 

 length. We oiler the suggestion that it has been denuded below 

 the. limit in which veins arc likely to occur, an idea which may be 

 confirmed by the relative abundance of black biotite mica in 

 it. as compared with the white muscovite granites which we 

 know form the bearing portions of the intrusions elsewhere. 



The Frontier Range. 

 The range which separates the Tavoy district from the Kingdom 

 of 8iam rises to heights of over 3,000 feet in the latitude of the 



h2 



