NO. 2 BIBLIOGRAPHY OF TIN HESS 173 



TASMANIA (Continued) 



replaced by tin, tourmaline and quartz. Tin lodes consist of a zone of replaced 

 granite (quartz tourmaline), with usually a central seam or fissure filled with tourma- 

 line and tin, which may vary from a few inches to many feet in width. Pyrites and 

 monazite occur in some veins. The small amount of work done has not only shown 

 the presence of rich alluvial tin, but has afforded evidence of the presence of rich 

 lode tin. 



1158a. WARD, L. KEITH. The tin field of North Dundas. 



Geol. Surv., Tasmania, Bull. No. G, 1909, Hobart, pp. 166. Locality map, pis. 5. 



Extract: Mg. Journ. Railw. Comm. Gaz., Vol. 86, 1909, London, pp. 232-233. 



Treated under heads: Introduction; previous literature on the field; physiography; 

 general geology; economic geology; history of mining on the field; the mining 

 properties. 



1159. WELLINGTON, WM. Notice on Mount Bischoff, Tasmania. 



Trans. Roy. Geol. Soc. Cornwall, Vol. 9, 1875, Penzance, pp. 161-162. 



Author thinks tin of Mt. Bischoff is the result of volcanic eruptions, Mt. Bischoff 

 being an extinct volcano. 



First deposit, of about 6 feet, is composed of small detached pieces of porphyry, 

 granite and tin disseminated through it. 



Second eruption is more granite, in shape of large boulders and not so much tin. 



Last eruption appears to have been more violent sending up large masses of granite 

 and the greatest quantity of tin. 



1160. WICKHAM, F. D. The tin products of Mount Bischoff, Tasmania. 



Mg. Journ. Railw. Comm. Gaz., Vol. 44, 1874, London, p. 396. 



1161. . The tin mines of Tasmania. 



Mg. Journ. Railw. Comm. Gaz., Vol. 48, 1878, London, p. 483. 



1161a. WILLIAMS, GERARD W. Notes on the Zeehan mining field, Tasmania. 



Eng. Ms. Journ., Vol. 89, 1910, New York, pp. 713-715, diagrams 2. 



1162. WILSON, A. P. Minerals and mining in Tasmania. 



Trans. Fed. Inst. Mg. Eng., Vol. 7, 1893-1894, Newcastle-upon-Tyne and London, 

 1894, pp. 277-278. 



Also, Trans. North of England Inst. Mg. Mech. Eng., Vol. 43, 1894, Newcastle-upon- 

 Tyne, p. 385. 



Short account of Mt. Bischoff tin mining. Other districts mentioned as important 

 are: Ringarooma, Branxholme, George's Bay and Blue Tier. 



Author thinks Tasmania is destined to occupy a more prominent place as a tin 

 producing district. Further examination will doubtless bring to light massive lodes 

 of tinstone which have been the source of the great alluvial deposits of the island. 



1163. WINTLE, S. H. Stanniferous deposits of Tasmania. 



Trans. Proc. Roy. Soc. New South Wales, for 1875, Vol. 9, 1876, Sydney, pp. 87-94, 

 fig. 1. 



Extract: Mg. Journ. Railw. Comm. Gaz., Vol. 45, 1875, London, pp. 1095-1096. 



Mount Bischoff tin deposits in eurite porphyry thrust through Paleozoic rocks, 

 " clay-slate, altered sandstone, limestone, conglomerate and quartzose rock." 



Limestones carry argentiferous galena, tin- and iron-pyrites and bismuth. All 

 covered by basalt. Mount Bischoff 3500 feet altitude. Tin ore occurs as veins and 

 lodes in porphyry. 



Description of tin ore occurrence at Mt. Ramsay. 



1164. . Notes on the mineral resources of Tasmania. 



Eng. Mg. Journ., Vol. 28, July 19, 1897, New York, pp. 38-39. 



An outline of the geological and commercial features of the island, including the 

 tin resources. 



