﻿pari 3] STANNIFEROUS DEPOSITS OP KINTA DISTRICT. 



185 



proved there in situ, gives an immediate explanation of its 

 angularity. 



In three mines, out of the twenty largest mines enumerated on 

 p. 182, granitic intrusions have not been discovered, but they 

 furnish evidence which, instead of supporting the glacial theory, 

 offers very strong arguments against it. One of these, the Malayan 

 Dredging Company's Mine, is in a part of the Kinta Valley 

 mapped by Mr. Scrivenor as not containing any glacial clays. 

 Of the other two, Tronoh South Mine has lignite throughout most 

 of its deposits and the ore at Pusing Bharu Mine is in rounded 

 grains. In his description of Pusing Bharu Mr. Scrivenor 

 writes 1 : — 



' The floor of the Pusing Bharu Mine is limestone. Several well-marked 

 " cups " have been uncovered, lined with Gondwana boulder-clays and filled 

 with sand and lignite, and elsewhere the limestone surface is very irregular 

 and broken up by pinnacles . . . The sand contains tin-ore, sometimes as 

 much as 3 katis (4 lbs.) to the cubic yard, and in some sections I have seen 

 small boulders of tourmaline-corundum rocks in lignitic sand close to the 

 junction with the boulder-clays . . . From time to time sections have been 

 exposed in the Pusing Bharu Mine for which it has been difficult, to say the 

 least, to find any clear explanation. The late General Manager, Mr. W. M. 

 Currie, thought that the clays had been to some extent rearranged by recent 

 river action, and brought forward as evidence the tin-ore, which he thought 

 to be distinctly waterworn. I cannot see, however, that the ore is more 

 worn than in the glacial beds generally, and think that the sinking of the 

 clays on to the dissolving limestone may be the cause of the diffi- 

 culties referred to. It would, for instance, be possible in this way to account 

 for the fragments of wood and patches of sand being- found in clay imme- 

 diately above the limestone, as, during the sinking movement, some of the 

 younger lignite and sand might become mingled with the older Gondwana 

 Clays.' 



The explanation given for the New Tambun Mine is, however, 

 totally different, for it is stated 3 that the relation there of the 

 younger Gondwana Rocks to the glacial clays 



! is obscure, but the latter are clearly faulted down against the limestone, and 

 it is possible that the younger rocks in turn have been faulted down against 

 the clays.' 



Without enumerating the large number of other mines in the 

 district, I will now state the general conclusion, namely, that 

 well over 90 per cent, of the ore derived from tbe Kinta 

 district is from mines situated within a distance of 

 less than a mile from the junctions of the granite of 

 the Main Range and the Kledang Range, or from 

 granitic intrusions contemporaneous with the granite 

 of these ranges; and that over 80 per cent, of the ore 

 is derived from mines where granite, or a granitic in- 

 trusion, has actually been proved on the property. 



1 ' The Geology & Mining Industry of the Kinta District ' 1913, p. 65. 



2 Ibid. p. 59. 



