6

“This meagre flora seems to indicate the very top of the Jurassic or
perhaps the lowest Kootenay rocks.”

It should be noted here that the sedimentary part of the Hazelton
series in this district rests upon a series of crystal and of agglomeratic tufis;
the contact passes between the Cap and the Hazelton View properties,
on Rocher Déboulé mountain, and extends over the ridge about one-half
mile south of the Rocher De Boule tramway. There appears to be a
structural unconformity, but this was not conclusively demonstrated,
however, there is a conglomerate at the base of the sediments, which
contains pebbles and boulders of the underlying tuffs. This conglomerate
is well exposed on the ridge above mentioned.

Another massive conglomerate occurs apparently in the middle of the
sedimentary series and is well exposed in the canyon of the Bulkley river
just below the high-level bridge; there does not seem to be any break in
the series at this point, and the fossils are not sufficiently diagnostic to
determine any slight break if one does occur.

ECONOMIC GEOLOGY.

GENERAL STATEMENT.

The district is divided into two parts by Bulkley river. The southern
or Rocher Déboulé area is characterized by deposits of chalcopyrite carrying
some gold and silver; molybdenite is important in one property and
wolframite occurs in appreciable amount in one prospect. The northern
portion of the district includes Ninemile, Fourmile, and Glen mountains,
and is characterized by silver-lead deposits.

South of Bulkley river the Rocher De Boule mine is the only large

producer at present, but development work is being pushed on the Delta,
Hazelton View, Cap, and Golden Wonder properties, from all of which small
shipments have been made. There are several properties on which a
considerable amount of work has been done, but they were shut down
because of lack of capital, or because the ore opened up was of too low a
grade, on the average, to permit of economical mining without milling
facilities.

In all of the above-named properties, except the Hazelton View, the
principal mineral is chalcopyrite and the ore carries small values in silver
and gold; in the Hazelton View property molybdenite and gold are both
important and there is practically no chalcopyrite in the main vein. Wolf-
ramite occurs in important amount in a prospect on the Black Prince group,
but has not been reported from any other property in the district.

The ore occurs in distinct shoots in veins of true-fissure-replacement,
or shear-zone-replacement types, and in some cases one type passes into
the other along the strike.

A scheme of general co-operation among the various companies that
have proved their properties or have showings sufficient to warrant further
development would be a great boon to the whole district. The lack of
power, milling facilities, and means of transportation is felt by all the
properties in Juniper Creek basin except the Rocher De Boule, and to install
a separate plant for each property would involve an expense that would
be prohibitive.