GEOLOGY AND ORE DEPOSITS OF SU-AN 25 



0.0028 0.72 



0.0014 0.61 



0.0018 2.16 



0.0018 — 



0.0014 0.61 



3.0018 — 



0.0008 0.28 



Nos. 1 and 2 are ores taken from the eastern portion of the eastern 



ore-body and stamped at Sok-tari. 



No. 3 is the finely pulverized ore originally mined from the eastern 



ore-body. 



Nos. 6 and 33 are from the ore heaps belonging to the Mining 



Co. at Moral- chili. 



Nos. 15 and 31 B are picked ores, the former from pit No. 14 and 

 the latter from adit No. 4, both being of superior quality. 

 Nos. 32 and 53 were selected out from an old dejected débris 

 and are partially colored greenish by the secondarily formed 

 malachite. 



Leaving No. 2 out of consideration, as it is an exceptionally 

 rich ore, the average of the analysed samples gives 0.0019 for gold, 

 0.0016 for silver. However, it must be noticed that the sampled 

 ores are those taken by native miners from the better-looking 

 portion of the ore-body ; and to select such a class of ores, it is 

 said, they throw away ores of inferior quality to ww amount rang- 

 ing from 70 % to 75 % of the mined limestone. 



Besides the samples of the ore-body, some individual specimens 

 of ores also found in contact limestone were taken from different 

 parts of the mine, the result of the assay made of them being as 

 follows : — 



