1 8 HAYDEN AND HATCH: GOLD-FIELDS OF WAINAd. 



pegmatite veins were in reality intrusive had, however, been recog- 

 nised by Dr. King, who drew attention to their frequent occur- 

 rence as also to the peculiarities, viz., the granular and saccharoid 

 character of quartz and the presence of mica — by which they differ 

 from the auriferous reefs. In this view he was partially followed by 

 Mr. Brough Smyth, who, however, though stating that they were 

 " essentially granitic," described them somewhat ambiguously as 

 u micacised reefs " 1 . 



C.-AURIFEROUS REEFS. 



The reels of south-east Waindd form a series of more or less paral=> 



lei bands running obliquely to the foliation of 

 Stiike. , _, . , 



the country-rock. Observation of the outcrops 



led Dr. King and others to the conclusion that their strike was in 

 most cases about north-north-west to south-south-east : in such 

 broken country, however, it is exceedingly difficult to deduce any con- 

 clusions from a series of isolated outcrops, which may or may not be 

 parts of the same reef : it is consequently impossible to be certain of 

 the strike except in those reefs which have been exploited to some 

 extent, such as those on the Alpha and Phcenix properties, in which 

 mines the strike of the reef is north-north-east to south-south-west and 

 north-east to south-west 2 or respectively at angles of about 45 and 

 23 to that of the foliation of the country-rock. 



The dip of the reefs is in almost all cases South-easterly, at angles 

 varying between 30 and 40 , the commonest 

 being 33 : in the Phcenix mine, however, the 

 reef dips to the westward, at about 33 . 



In many cases the reefs seem to be of very considerable extent; 



this, however, is a factor which must vary for 



each individual reef, and no generalisations are 



possible, for each case can be decided only by practical experiment. 



1 Op. tit., p. 6. 



a See Plates 5 and 6. 



( 18 ) 



