62 



Altliough numerous deposits occur in this district, there are 

 Southern none of any special importance. The Captain's Flat (Lake 

 District. Greorge) Mine is well represented. 



6745, leafy native copper, with arborescent (plant-like) 

 growths. 



6744, hydrous sulphate of copper; the " bluestone" or " blue 

 "vitriol" o£ commerce when artificially prepared. It is not an 

 original mineral, but always results from the solution of copper 

 from the ore by percolating water and its re-deposition in 

 cavities or even upon the timbering of old mine workings.* 



1238, from the 360-foot level in the Lake George Mine, indi- 

 cates the general nature of the ore — an intimate mixture of 

 copper and iron pyrites with zinc blende. 



Por other ores from this mine, see under Silver, case 60. 



'■'9117, Snowball Mine, Gundagai: rich copper pyrites in 

 chlorite schist. t 



9087, Jones Creek, Gundagai : clay-slate, with a thin film of 

 native copper. 



6884, in case 126, from the chrome mines at Gundagai, shows 

 chrysocoUa (hydrous silicate of copper), with serpentine and 

 chlorite. 



Peehvood, native copper, 1754, 1755; azurite crystallised with 

 cerussite, 1779 ; malachite, showing the characteristic mammil- 

 lated form, 1797. 



9111, Tuena : weathered schistose rock, with sulphates of ironj 

 and copper, assaying 9 dwt. of gold per ton and 20 per cent, of 

 copper. 



1832, Brungle : copper pyrites in chlorite schist. 



* The occurrence of blue vitriol, while proving the existence of copper ores, in no way 

 indicates that these are rich. The ore may be distributed through the rock in verj^ small 

 quantitj' ; but, given sufficient time, water will dissolve out enough to make a deposit of 

 copper minerals. 



t Chlorite schist is a metamorphic rock, not uncommonlj^ associated with copper ores in 

 NeAv South Wales. 



1 A secondary mineral, resulting in the same manner as bluestone. 



