(48 a) Crown Prince Deposit
(See Figure 35)
LOCATION

The Crown Prince mineral claim is-near the eastern extremity of
the group, and lies on the eastern slope of Broughton range, overlooking
the mouth of Effingham inlet, from which it is distant one mile as the
crow flies. The deposit may be reached by a fair trail leading from Sechart
whaling station, on the southwest side of the peninsula, in a northeasterly
direction for 2 miles to a cabin on Lord of the Isles claim. After this point
the trail is obliterated, but may be located again after travelling about
2,000 feet in a northeasterly direction through thick underbrush. The
old trail connecting this deposit with the others to the west has been
obliterated by forest fires and underbrush, which have made the inter-
vening country impossible of investigation.

The country covered by the Crown Prince claim slopes rather steeply
to the east and southeast down to a timber-covered bench below the
workings, from which a gradual slope leads down to tidewater in the
protected channel between Narrow island and the shore. In the vicinity
of the showings, the altitude varies from 750 to 900 feet. Much of the
timber has been felled, and in consequence a very dense growth of under-
brush and small evergreens has sprung up rendering travelling most diffi-
cult. Below the claim, the country is well timbered with hemlock, cedar,
balsam, and some spruce; while above the principal showing a hummock
reaching 1,130 feet in elevation, and well timbered, stands out in relief
against the burnt-over higher slopes of Broughton range.

GEOLOGY

The shorelines of Sechart peninsula and adjacent islands show almost
continuous exposures of Beale hornblende diorite, with a few roof pendants
of crystalline limestone, and andesitic volcanics of the Vancouver group.
On Narrows island, 13 miles due east of the Crown Prince deposit, the
diorite is traversed by an intrusive mass of granodiorite, similar to that
occurring in other parts of Barkley sound.!

Around the deposit, however, only two exposures of intrusive rocks
occur, both of granite and both of very small size. Most of the country
rock exposed is a fine to medium-grained, banded, silicified andesitie
tuff (of the Vancouver series), whose limited exposures point to an east-
west strike and a varying northerly dip. This tuff is traversed in places
by narrow dykes of fine-grained granite or quartz monzonite, and under
the microscope thin sections of this tuff show an abundance of tiny vein-
like stringers and bunches of quartz monzonite, giving the general effect
of feldspathization of the rock. The most northwesterly exposure of
tuff in the area of Figure 35 occurs along a southerly facing cliff and shows
a marked banding and crystallinity, causing the rock to resemble a biotite
gneiss. It is probable that this structure and texture is given to the tuff
by the lit-par-lit injection of thin intrusive sills of the same origin as the
feldspathization just mentioned.

No hornblende diorite, elsewhere so widespread, was observed on
the claim, and no intrusive contact of any importance was encountered,
Limestone does not occur, or at least is not exposed.

1 Observations made from yet unpublished geological maps of west coast of Vancouver island, by V. Dolmage.