﻿part 3] SECONDARY STANNIFEROUS DEPOSITS IN PERA.K. 



165 



The Origin of the Secondary Stanniferous Deposits of the 



Kinta District, Perak (Federated Malay States). 

 By William Richard Jones, D.I.C., D.Sc.(Lond)., F.G.S., 



A.I.M.M., Late Assistant & Acting Government Geologist 

 to the F.M.S. (Read June 23rd. 1915.) 



[Plates XIII-XV 

 Contents. 



I. Introduction Ig5 



II. General Description of the Kinta District 166 



III. Geological History of the Kinta Valley 169 



IV. Alluvial Origin of the Stanniferous Clays and the 



'Boulder Clays' 175 



V. Mode of Faulting- of the Clays 187 



VI. Absence of Glacial Characters 188 



VII. The ' Glacial Clays ' of the Kinta District cannot be 



correlated with the Talchir Beds of India 191 



VIII. Summary and Conclusion 192 



I. Introduction. 



In September 1910, Mr. J. B. Scrivenor, Government Geologist 

 to the Federated Malay States, described certain deposits (the 

 Gopeng Beds) in the Kinta district as being 'the remains of a 

 very ancient tin -field that formed part of Gondwanaland,' and 

 as having been transported by glaciers or sheets of floating ice. 1 

 This theory of their origin has also been maintained by its author 

 in later publications, 3 and in an article in the ' Geological Maga- 

 zine ' for July 1914, p. 309, he states that the Glacial theory 

 ' best explains the facts in the field. 1 



The presence in these ' clays and boulder-clays ' of rich deposits 

 of tin-ore, the bulk' of which, according to Mr. Scrivenor, 8 is 

 derived from Gondwanaland, gives very great economic importance 

 to the question of their origin ; and its importance from a scientific 

 point of view becomes immediately apparent when it is realized 

 that these clays are stated to have furnished 'a more valuable 

 horizon on climatic evidence than can be afforded by limited 



1 ' Report on Prospecting Work at Gopeng by the Government Geologist 

 No. 13 ' Kuala Lumpur, 1910, p. 3. 



2 ' Geology & Mining Industry of the Kinta District, Perak (Federated 

 Malay States) ' Kuala Lumpur, 1913, pp. 27-46 & map ; see also ' The 

 Geology & Mining Industries of Ulu Pahang ' Kuala Lumpur, 1911, pp. 49 & 

 map. 



3 ' Geology & Mining Industry of the Kinta District ' 1913, p. 35. 

 Q. J. G. S. No. 287. o 



