346 iV. li. Junner : 



Creek Company's workings, two fair-sized faults of this nature 

 were encountered. The hrst one was passed through near the sur- 

 face, and it intersects the dyke near the Diamond Creek shaft 

 at the 500 feet level. The other one came in near the Union shaft 

 at the No. 6 level. The vertical displacement, or blank ground, in 

 this case was about sixty feet, and as yet it has not cut the Diamond 

 Creek workings. Another fairly large fault of a similar nature 

 has intersected the dyke near the latter shaft at about 200 feet from 

 the surface. Numerous others, with displacements of 20 feet and 

 under, occur througliout the mine. Considerable brecciation of the 

 dyke has occurred near the faults, and later solutions passing 

 through these fissures have deposited pyiites, and this frequently 

 binds the fragments of dyke together. Besides these strike faults, 

 one or tw^o cross or " transverse " faults have been noted. A good 

 example of this faulting occurs in the 700 feet level, south drive. 

 The strike of the fault is about 15 deg. north of east, and it hades 

 to the N.N.W. 



8. — Relations of the various Quartz Reefs to 

 one another. 



(a) Occurrence and relative size. 



At least 4 distinct types of veins have been observed. They are, 

 in order of age as far as has been determined : — 



1. Vertical reefs — oldest. 



2. Bedded reefs. 



3. Dyke reefs. 



4. Joint plane reefs — youngest. 



As an illustration of the first type, we have the reef Avhich runs 

 into the dyke from the south-west side of the main drive north, at 

 the 300 feet level. The actual junction of the dyke with the slate 

 reef was not seen, but sections along the drive shoAv that the reef is 

 not continuous across the dyke. The management liave driven along 

 the hanging wall of the dyke for some short distance with the view 

 <if locating the northern continuation of the reef. They were not 

 successfid, liowever. and it is prohal)lf tliat pre-dyke faulting con- 

 nected with tlic biecciation has displaced the reef. On the sur- 

 face two reefs, uiu- of which is jiossibly the upward extension of 

 the above mentioned reef outci-op on the noi-th-east side of the 

 dvkc. From surface shafts which are only down to relatively shallow 

 <lepths, and are nearly all vertical, it was not possible to be 

 certain that these reefs were not bedded, as tlie dip of the silurian 



