AUSTRALASIA, NEW GUINEA, AND NEW ZEALAND 773 



d) Tasmania: The tin, wolfram, molybdenite, and bismuth 

 deposits of Tasmania are considered to be of closing Silurian or 

 early Devonian age. 1 



The tin production exceeds £12,000,000 and the wolfram 

 £50,000 in value. Molybdenite has not been worked, but bismuth 

 to the extent of about £200,000 value has been won. 



e) Victoria and Southeastern New South Wales: In Victoria 

 the age of the tin, wolfram, molybdenite, and bismuth deposits 

 is not known definitely. The value of the tin won is slightly 

 less than £1,000,000, that of the wolfram about £5,000, while 

 molybdenite and bismuth have been found only in very small 

 quantities. 



Probably Victoria and Southeastern New South Wales form 

 one geological province, and in the latter area the tin and allied 

 minerals may be considered as of post-Devonian and of pre- 

 Permo-Carboniferous age. Tin is relatively rare, but molybdenite 

 and bismuth are abundantly represented. 



/) Northeastern New South Wales and Eastern Queensland: 

 The northeastern portion of New South Wales appears to be a 

 province geologically distinct from that of the southeastern portion 

 of the state, and the tin, wolfram, molybdenite, and bismuth 

 deposits found there appear to be closing Paleozoic in age. These 

 deposits are confined to a strip less than 150 miles from the coast. 

 The commercial molybdenite and the bismuth occur within 

 the eastern zone, while the commercial tin occurs within the 

 western .zone. The small deposits of the far west, near Broken 

 Hill, for example, apparently are of very early Paleozoic 

 age, and they really belong to the South Australian region or 

 province. 



The value of the tin won from New South Wales exceeds 

 £10,500,000, the wolfram values approximate £200,000, the bis- 

 muth £150,000, and the molybdenite about £100,000. 



In this connection it should be remembered that until 1902 

 molybdenite was considered as an impurity in the bismuth, its 



X W. H. Twelvetrees, "The Scamander Mineral District," Bull. No. 9, Geol. 

 Survey, Tasmania, it»n, p. 23-24; other official reports of great interest dealing with 

 the subject of mineral deposits in Tasmania are by L. K. Ward, Loftus Hills, and 

 L. L. Waterhouse. 



