TIN DEPOSITS OF THE MALAY PENINSULA 



147 



cracks in the rock, either longitudinally or transversely with the 

 zone of fracturing. (See Fig. 5.) It is associated with large 

 quantities of iron pyrites and arsenical pyrites, and smaller quan- 

 tities of chalcopyrite and bornite, with some rhodochrosite. On 

 the surface, limonite and malachite are found in the leached 

 hollows of the rock, having been derived from the oxidation of 

 the iron and copper sulphides. The deposit has been opened by 



Fig. 5. — Section showing occurrence of tin in limestone at Chongkat Pari,Perak 

 Malay peninsula. 



a cut about 20 feet in depth in the limestone, but not much ore 

 has been mined, as it has not yet been found in large quantities. 



A few miles southeast of Ipoh, on the road to Gopeng, are a 

 number of limestone hills rising several hundred feet above the 

 valley. On the summits of some of these tin is said to have 

 been found in the soil. It has yet to be determined, however, 

 whether these deposits have been derived by decay in sitti from 

 tin deposits in the limestone, or whether they are the remains of 

 old alluvial deposits transported there from a distance before 

 the hills were formed. (See Fig. 6.) 



At Bruseh, near Tapa, in Perak, tin has been found in thin 

 seams and films along the lines of bedding in a soft, fine-grained, 

 friable sandstone, which bears every evidence of being a com- 

 paratively young rock, and it seems probable that the tin in it 

 was derived from tin-bearing solutions from the older rocks 



