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



The geology of the Emmaville district has been investigated in 

 detail by Professor David, and the results of his work constitute 

 a valuable memoir published by tlie Geological Survey of New 

 South Wales.* 



The same gentleman has also contributed to our knowledge of 

 the Tingha district, and the map published by the Mines Depart- 

 ment of New South Wales, from a partial geological survey by 

 Wilkinson and David, has been of much assistance to me in my 

 study of this field. 



A later writer, Mr. E, E. Andrews,! also of the Geological 

 Survey of New South Wales, has also contributed a series of 

 papers embracing both areas, and has studied the ore-deposits 

 more from a genetic standpoint. 



A few useful observations on these New England tin-deposits 

 were made by Mr. G. H. F. XJlrich| shortly after their discovery, 

 but, with this exception, practically all the work that has been 

 done has been accomplished by officers of the Geological Survey. 



My experience has so far been limited to the Tingha area, and 

 the observations made in this paper refer to that district. No 

 attempt vvill be made here to explain in any detail the genesis of 

 the ore-deposits; as it is rather my intention to collect as much 

 evidence as possible from other occurrences and laboratory inves- 

 tigation before discussing at any length the question of origin. 

 The contents of this paper, then, consist of a brief record of the 

 observations made during a four months' study in the Tingha 



♦David, T. W. E., "Geology of the Vegetable Creek Tin-Mining Field." 

 Mem. Geol. Survey New South Wales. Geology, No. 1 (1887). 



fAndrews, E. C, " The Geology of the New England Plateau.— Part i., 

 Physiography"; Records Geol. Surv. New South Wales, Vol. vii. p. 281, 

 1904; Parts ii. and iii., with special reference to the Granites of 

 Northern New England ; op. cit. Vol. viii., p. 108, 1905; Part iv., 

 Petrology, op. cit. p 196, 1907; Part v.. Additional Notes on the Origin of 

 New England Ore Deposits, op. cit. p. 239, 1907. 



jUlrich, G. H. F., ** Observations on some of the recent Tin-Ore Dis- 

 coveries in New England, New South Wales." Quart. Journ. Geol. Sec. 

 Vol. xxix., p. 5, 1873. 



