MAGANESE ORES OF NOVA SCOTIA. 11 



Tenny. ' Cheverie. ■' 



IManganese oxides 85'54 86-81 



Iron peroxide 1-18 •> 



Baryta -89 1 ^■""' 



Insoluble matter 3-27 1-14 



Phosphoric acid -34 — 



AVater S-54 10-00 



Available oxygen , 51-54 47-73 



The Tenuy Cape maugauite is compact, -with partly fibrous structure, aud subme- 

 tallic lustre. It is not iu much demand at present, but I am informed that considerable 

 quantities could be got at several points. The following are the principal minerals found 

 in connection with the Tenny Cape ores : — 



Caldte. This, the most abundant accessory, occurs as low rhombohedral crystals 

 implanted on the limestone, of reddish and bluish shades, frequently with the edges 

 clouded symmetrically with impurities ; and as a secondary deposit on the preceding 

 crystals, in the form of snow-white grannular incrustations, frequently penetrated by the 

 fibres of pyrolusite ; and as a capping on isolated fibres of the ore. The pyrolusite also 

 occurs encrusting wine-coloured crystals of dog-tooth spar. 



Iron is present as an earthy red hematite, and as a fibrous and mammilated limouite. 

 Iron sulphide is seldom visible. 



Barite occurs iu rounded nodules, aud in tabular crystals in the ore, and mixed with 

 the calcspar. 



Selenite is sometimes noticed in fibrous form, and in thin transparent films. 



Many very beautiful cabinet specimens of these minerals have been met at Mr. J. W. 

 Stephens' mine, the natural beauty of the crystals being greatly increased by the setting 

 of gleaming fibres of the black pyrolusite. 



Lower Carboniferous limestones at Minudie, in Cumberland County, have yielded 

 sinall quantities of a soft fine-grained pyrolusite, giving on analysis 9'70-l per cent, of 

 manganese binoxide. Ores similar to those of Tenny Cape are found at Onslow, and on 

 the Salmon River, near Truro, Colchester County. Prospecting work has shown red 

 shales and sandstones, and beds of dark-bhiish limestone, covered by beds of gravel and 

 clay holding nodules of compact sub-crystalline pyrolusite. The ore also occurs in veins, 

 up to four inches iu thickness, in the sandstones, and in irregular nests and layers in the 

 limestone. Calcspar, barite, and selenite are found in the veins, which are filled with 

 fibrous ore. The exact horizon of the beds holding these ores is not readily ascertainable, 

 and it may be higher in the marine limestone formation than at Tenny Cape. The ore is 

 of very good quality, some of it running as high as ninety per cent, of available oxide. In 

 Pictou County, near Grleugarry station, nodules of fibrous pyrolusite, containing eighty- 

 four per cent, of peroxide, are found with crystals of dog-tooth spar, in a dark-blue lime- 

 stone, similar to that at Spriugville already referred to, and exjwsed close to the junction 

 of the marine limestone with pre-carboniferovis rocks. 



Boulders of a mixture of psilomelane with maugauite occur lying on the limestone 

 at Springville, of which an analysis has already been given, and on the associated red 



' Dr. How. 

 2 E. Gilpin. 



