﻿part 3] STANNIFEROUS DEPOSITS OF KINTA DISTRICT. 



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rock, common ; small masses of kaolin, not very common (kaolin-veins are 

 common) : brown tourmaline-schist, often veined with quartz and white mica, 

 abundant ; granite, some porphyritic, not common ; tourmaline-granite, not 

 common ; corundum, rare at Gopeng, but common as large and small boulders 

 in one part of the Tekka Ltd. Mine. 



It will be noticed that all the rocks and minerals are those that 

 would be expected near the contact of an acid granite with schists 

 and phyllites. 



Localities where the schists and phyllites have been, and are still 

 being, worked for tin-ore occurring definitely in situ have already 

 been mentioned, but attention is drawn to the following as being 

 of particular interest. At the beginning of July 1914 a remark- 

 ably rich deposit of tin-ore was found on Mining Lease 6973, 

 at Papan in the west of the Kinta district. It was in a much 

 decomposed phyllite, which still, however, retained in places distinct 

 traces of foliation; and the ore occurred as a vein, keeping a very 

 definite course, varying from 335° to 340°. It was definitely in 

 situ, and beautiful crystals, with sharp edges and brilliant faces, 

 were collected by Mr. W. A. Naish, A.R.S.M., Inspector of Mines, 

 and myself. Granite is exposed a short distance away, and the 

 junction may be within about 200 yards of this spot. Similar 

 veins, ver}^ rich in tin-ore, and keeping definite courses for short 

 distances, have been found on several occasions traversing the 

 schists in this locality. 



(c) The Deposits richest in Tin-Ore occur near the Granite- 

 Junctions and Granitic Intrusions. 



One of the most striking and conclusive proofs of the origin of 

 the tin-ore in the clays of the Kinta district is, however, the fact 

 that those properties that have produced, and are still producing, 

 the richest yield of tin-ore are all found near the granite-junction 

 of the two granite ranges or near a granitic intrusion ; and that the 

 deposits farthest from the granite-junction and granitic intrusions, 

 namely, those towards the central parts of the valley, contain too 

 little tin-ore, or tin-ore in too fine a state of division, to be worked, 

 This fact is clearly brought out by the coloured Government Survey 

 map, in which the land given over to agriculture is coloured green 

 and the mining land red. 



It is not suggested here that all the agricultural land contains 

 no tin-ore, but it contains too little to be profitably worked. Most 

 of the rubber-estates in the Kinta Valley have been planted during 

 the last few years, during which time it has been the practice of 

 the Mines Department not to recommend the alienation of any 

 land for agriculture in the Kinta district until it has been 

 proved, by the sinking of pits or boring, to contain too little 

 tin -ore to be workable. 



The following is a list, supplied by the courtesy of the Warden 

 of Mines for the Kinta district, of the twenty largest tin-mines 



Q. J. G. S. No. 287. p 



