248 OCCURRENCE ()F TIN IN NOVA SCOTIA. PIERS. 



evidently :iot pay to mine the whole width of the pegmatite 

 material (12 feet) because of its paucity of tin. 



This proper method of concentration of this tin ore is direct 

 graded crushing and concentration on a fine sand concentrator 

 such as a jerking table like the Wilfley pattern.* 



Conclusions. Professor Sexton's test indicates that the 

 whole width of the dike, at that depth, is low in tin contents, 

 and an effort should be made to discover if the cassiterite is 

 segregated in any one part of the dike, as is quite likely, in 

 which case the percentage would be increased in the portion of 

 the dike that might be mined. Numerous pieces of ore, 

 about the size of a hazel-nut, have been obtained and are 

 in the Provincial Mnseum, but it is not known from 

 what part of the deposit they were taken. The presence 

 of an ore-shoot should be ascertained if possible. It must 

 be remembered that some of the associated minerals are 

 valuable for various purposes, and bring excellent prices in the 

 market, and if some of 'them are proved to be in sufficient quan- 

 tity might be even more profitable than the tin, or at any rate 

 might be worked conjointly with that ore, and so make a profit- 

 able proposition. So far these associated minerals do not seem 

 to have attracted the attention of the owners, although they 

 much merit consideration. 



I would suggest that the gravels and sands of the low-lying 

 districts about New Ross .and other favorable localities on or 

 adjoining the granitic areas of Nova Scotia be carefully exam- 

 ined for the occurrence of stream tin, as such alluvial deposits 

 might be found to be more valuable than those in situ. Peg- 

 matite dikes in granite and in the adjacent sedimentary metro- 

 morphis rocks of the gold-measures, particularly such dikes as 

 contain boron and fluorine minerals, such as tourmaline, 

 fluorite, etc., and also lithium-bearing minerals, should be 



* Sexton (F. H.) Report on concentration test on tin ore from Xew Ross. 4th Sept., 

 1907. Manuscript. 



