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THE TIN-DEPOSITS OF NEW ENGLAND, N.S.W., I., 



felspar or chlorite. Vughs in the chlorite lined with quartz- 

 crystals are of common occurrence. The country-rock is the 

 " Acid Granite," and a regular transition can be made out 

 between this and the chlorite lode-material. 



A rather different deposit of some interest is that known as 

 Cox's Reef, situated about half a mile west of Murray's Water. 

 A number of joint-planes in the granite have been impregnated 

 with chlorite, and the country-rock, the Tingha Granite, has 

 been altered for a few inches on each side of the vein. The veins 

 are small (from one-quarter to half an inch wide), and consist of 

 two groups, one bearing N,66°E,, and the other E.6^S. In this 

 occurrence the chlorite is associated with greenish glassy quartz- 

 veins, which abut sharply against a zone of felspar-rock contain- 



Scale 



2 Feet 



Fig. 8. — Section across Cox's Reef, near Murray's Water. A, The Tingha 

 Granite; B, Chlorite in patches and veins; C, Quartz; D, Cassiterite; E, 

 Felspar, constituting main bulk of lode-material. 



ing chlorite and cassiterite. There also occur minute crystals of 

 a green colour, prismatic in habit, which are probably beryl. 

 The felspar-zone passes gradually over, by increases of quartz and 

 a different development of the felspar, into the normal granite 

 The total width of the lode-stuff is about 2 feet, and it is 

 traversed by several of these chlorit-eveins. (Text-fig. 8). 



