THE ADIRONDACK GRAPHITE DEPOSITS III 



is apparently of considerable extent. He was kind enough to send 

 the writer several samples that bear out Professor Kemp's opinion 

 that they are of too low a grade to demand any attention. 



It would appear that the deposit is of the usual graphitic schist, 

 outcropping along the ridge between Lake George and Lake Cham- 

 plain. The eruptive dike may well be the metagabbro. The reader 

 is cautioned to interpret the word " vein " as it is used above to mean 

 a bedded deposit. 



The Macomb Graphite Company — Popes Mills Graphite 



Company 



The mine is in the township of Macomb, St Lawrence county, 

 south of Black lake, i 1 /* miles southeast of Popes Mills, within the 

 Hammond quadrangle. 



Workings. " The cut shows a finely laminated graphite quartz- 

 schist complexly foliated and corrugated. It may represent the 

 highly metamorphosed deposits of organic material near the shores 

 of the [pre-] Cambrian sea. The contact line of the indurated 

 Cambrian sandstone is irregularly disposed as the northern boundary 

 of this locality. The laminated deposit is crumpled, friable, quart- 

 zose and contains a small proportion of iron [pyrite] . The property 

 has been worked to a limited extent by a small company under the 

 name of the Macomb Graphite Company. A section about 75 feet 

 long and nearly 15 feet deep into the face of one of the folds has 

 been made. The structure is uniform and rich in graphite. The 

 company mined about 100 tons of rock for experimental purposes. 

 The deposit seems to grow richer and the percentage of the iron 

 [pyrite] to decrease with depth. Although the milling was done 

 with rather crude equipment the yield was from 15 to 20 per cent of 

 graphite. 



" Several tons of excellent concentrates were produced, averaging 

 more than 90 per cent of carbon. The product was distributed to 

 various manufacturers to determine its practical value for lubrica- 

 tion, foundry work, metallic paint and other uses. 



" The reports were highly satisfactory. For lack of capital the 

 company has temporarily ceased operations after having worked 

 out the major problem of extraction." 1 



Cirkel 2 says : " Some development work was done last year ( 1906) 

 on a prospect near Popes Mills, town of Macomb. The graphite 

 occurs as fine scales in schist and the deposit is said to be extensive. 



1 Mills, Frank S., Eng. & Min. Jour., Feb. 22, 1908, 85:397. 



2 Cirkel, Fritz, " Graphite," Can. Dep't. of Mines, Mines Br. 1907, p 



