170 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 58 



TASMANIA (Continued) 



1140. . Report on the mineral fields between Waratah and Corinna. 



Rep. Seer, for Mines for 1S99-19O0, Tasmania, 1900, Hobart, pp. CXL-CCVII, plans 2. 



Review: Austr. Mg. Stand., Vol. 18, 1900, Sydney and Melbourna, pp. 592-593. 



Mt. Bischoff tin mine [pp. CL-CLVI], rises 500 feet above the Waratah plateau. 

 The first discovery of tin ore was made by James Smith in 1871. The mine has been 

 dividend-paying continuously since 1878; total dividends paid to date being £1,674,000; 

 total tin ore to date, 57,358 tons; value £3,316,528. 



The geology of the deposit is treated. 



Webster's Workings [pp. CLVI-CLVII] and Ten-mile tin claim at White River Bridge 

 [pp. CLVII-CLIX] are alluvial tin claims. 



1141. . Report on the tin mines of Blue Tier, county of Dorset. 



Geol. Surv., Tasmania, 1901, Hobart, pp. 33, figs. 9. 



Also in Rep. "Seer. Mines, Tasmania, 1901-1902, Hobart, pp. 90-123. 



Supposing only that the tinstone continues a very little below already proved 

 depths, there is suflicient tin bearing rock to keep several mines going for a good 

 many years. If it descends indefinitely, there is enough stone for generations. If the 

 dyke theory is correct, there is no reason why it should not persist to great depth. 

 If the floor theory is the right one, it will still descend to any required depth. The 

 development of the mines appears to be governed by the water power available. With 

 adequate water supply, the district would undoubtedly be a busy tin-producing center. 

 It is a productive district as it is, but its production is intermittent, being dependent 

 upon rainfall. Author holds high hopes of a future for the Tier. Tlie mines of the 

 district are described individually. 



1142. . The Bell Mount Mining Field. 



Journ. Print. Pap. Pari., Tasmania, Vol. 45, 1901, Hobart, pp. 57-60. 

 Not available to the authors. 



1143. . Report on the tin-bearing capabilities of the Gladstone district. 



Joum. Print. Pap. Pari., Tasmania, Vol. 43, 1901, Hobart, pp. 72-83, gtol. map 1. 



Also in Rep. Seer, for Mines, Tasmania, 1901, Hobart, pp. 232-267, plan. 



Digest: Geol. Centr., Vol. 2, 1902, Leipzig, p. 581. 



The tin ore occurs principally in gravels spread far and wide over the surface of the 

 country. The changes in level of the land since Tertiary times and their effect on 

 the tin deposits, as also that of lava streams, is described. Topaz, sometimes very 

 fine, and sapphires occur in the drift. — Geo. W. Card. 



1144. . Report on the coal field of Llandaff, the Denison and Douglas 



rivers, on the deposits of tin ore on Schouten Main, and on out-crops 

 of quartz near Buckland. 



Rep. Seer, for Mines, for 1901-1902, Tasmania, 1902, Hobart, pp. 52-62, sketch maps 2. 



" Schouten Main is the name used for that part of the mainland which is at the 

 head of Freycinct's Peninsula, and consists of granite, with the exception of some 

 Silurian metamorphic sandstone on the crest and east slope of the hill overlooking 

 Bluestone Bay." 



It is estimated that 150 tons of alluvial tin ore has been mined — it is possible that 

 large lodes exist in the granite, that have eluded discovery, but the author would 

 give different sources for it: 



1. Small quartz veins enclosing coarse tin. 



2. Greisenised bands of granite containing small quantities of ore. 



1145. . Report on mineral fields between Waratah and Long Plains. 



Geol. surv., Tasmania, 1903, Hobart, pp. 38. 



Badger tin mines, pp. 35-37. 



Situated 5 miles from W^aratah. Tin occurs in kaolinized and silicified porphyritic 

 granite. Samples assayed 7.77 to 9.2 per cent metallic tin. Some alluvial tin. Little 

 work done. 



