-50—

the range to the north aro of similar nature and the intrusive
may be a correlative of masses of similar quartz monzonite that
extend in a belt in the eastern part of the Coast range from
south of Atlin lake to north of Iskut river. Small intrusive
bodics, probably mainly granodiorite, occur near the Windfall
property on Porcupine creek, north and south of the river near
Woodcock, and in the vicinity of the Dynamiter property farther
south. Possibly they are related to the intrusives of Bulkley
mountain to the east rather than to the Coast Range intrusives
to the west.

Mineralization and evidence of it in the form of rusty
exposures is widespread throughout this section. Most of the
deposits carry lead, zinc, and (or) copper with low values in
gold and silver, and occur along bedding planes as fissure veins
and replacements, or in or near the small granodiorite intrusive
masses. In many Sesosees throughout the area sparse mineral-
ization can be seen along the bedding planes. Larger amounts
generally occur between beds of different character and where
the regular structure of the strata is disturbed by minor
anticlines, crumples, faults, or other features. Deposits, such
as those on the Windfall, Seven Sisters, and Waverley claims,
appear to lie in the crests of minor anticlines and mainly in
or over tuff beds. On the Windfall and Seven Sisters claims
and in many other places it is clear that the mincralization
dies away in a very short distance down the limbs of che folds.
On the Seven Sisters claim similar deposits occur at successively
lower horizons on the axis of the fold.

Saline deposits of finely divided calcium carbonate in

demand locally for land dressing occur 1 mile west of Ritchio.—

! jun, Rept., Minister of Mines, B.C., 1932, p. 91.

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