44 



The newly discovered gold-field of Tambulla is in granite 

 country, the granite itself sometimes showing gold (9449), but 

 the ore is principally quartz, carrying sulphides at a depth. 



Famlula. — The well-known Pambula Gold-field was for a 

 long time a puzzle. The gold occurs as an impregnation in 

 the country-rock, which was formerly regarded as a sedimentary 

 rock, but is now definitely proved to be volcanic rock (rhyolite). 

 The evidence for this is obtained principally by means of the 

 microscope, but 7782 affords ocular demonstration, the banding 

 in the rock representing the lines of flow of the molten rock. 

 The Pambula rock is much altered, but 7782 may be compared 

 ■with rhyolites of less ancient date.* It would be popularly 

 known as felsite, and may be compared with the Grassy Gully 

 ore, see (page 43). 



7773-4-5 illustrate the occurrence of the rich shoot at the 

 200-feet level in the Victory mine. 



The band marked 1 in the diagram is a thin quartz rein on the 

 hanging wall. It is a constant indicator of the ore body, and 

 is known as the "Pilot." 



7777 is a portion of the indicator from Faulkner's Mine, 

 7779, 7781 from the rich shoot in. Paulkner's, the former 

 assaying from 50 oz. to 150 oz. of gold per ton. 8481, Pambula 

 Mines, showing gold freely. 



In end compartment of case 65 will be seen a block of ore 

 from the Mount Gahan Mine showing thebrecciation sometimes 

 noticeable in the ore. 



* From Hungary, in case 119 ; from Raymond Terrace, in cases 143 and 147. 



