90

The width of the ore-body decreases upwards, so that in a vertical plane its
outline is approximately that of a triangle with its base marking the level
of the quarry floor. There is no evidence that much of this ore-body
has been removed. It appears to be the upper part of the eastern face of
a body that may extend westward for some distance into the hill and
downwards with perhaps increasing dimensions. On the other hand,
it is possible that this body is of small dimensions. ;

The zone of heavily mineralized diorite, in part a low-grade iron ore,
described as commencing at the western end of the pocket-like extension
of the quarry, extends westward up and over a southward projecting spur
of the main hill. The belt of altered rock at first has an average breadth
of 50 feet and maintains this for a distance of 80 feet to a point where it
commences to expand and, bending to the south, attains a maximum
breadth of 170 feet and encircles a large body of magnetite developed
by a second quarry opening. ‘The floor of this quarry is at an elevation
of 420 feet. The quarry extends northward into the hill for a distance of
70 feet, with a width increasing at the inner face to 40 feet. In the north-
east angle of the quarry, a tunnel expanding into a chamber extends 30
feet farther north and is all in ore. The east and west sides of the quarry
approximately mark the boundaries of the ore mass which is roughly oval
or pear-shaped of outline with a major axis, running northward and 145
feet long, and a minor axis, 65 feet long. The inner north face of the
quarry is of ore occupying a steep, in part precipitous, slope on which the
north end of the ore-body lies 125 feet above the quarry floor. In plan,
the area of the ore-body measures 7,500 square feet. On its eastern side,
the mass of ore is rather sharply divided from the bordering zone of highly
altered, magnetite-impregnated diorite. On the west side, the distinction
between ore and rock is less sharply drawn and there for a breadth varying
from 20 to 80 feet the bordering rock is rich in magnetite and holds masses
of nearly pure iron ore 20 to 30 feet in diameter.

The outcrop of the second ore mass is 100 feet west of the body of ore
visible in the west end of the first-described quarry working. The two
ore-bodies are connected by the 50-foot wide band of magnetite-rich rock,
but otherwise at the surface form two distinct ore-bodies in part separted
by a mass of relatively little altered diorite.

In front of the second-deseribed, lower quarry, the hill-side below for a
breadth of 100 feet is covered by waste rock and ore from the quarry.
This material conceals a considerable area of what is probably highly
mineralized rock, since to the west at the lower edge of the waste-covered
area, and higher up the hill above the dumps, highly mineralized rock is
visible with here and there patches and bodies of nearly pure magnetite,
some above 50 feet in length. This highly mineralized area extends
westward for 300 feet and ends against a large, drift-covered space extending
southward from the edge of the higher of the two quarry workings. Out-
side this heavily mineralized area, the quartz diorite in places shows altera-
tion in a varying degree and in several places was seen to hold small masses
of magnetite.

Down the hill-side, at a point 162 feet above sea-level, a tunnel 617
feet long has been driven northward along a varying course. Throughout
its length to within 80 feet of its end, the tunnel walls show practically
unchanged quartz diorite save at a point 400 feet from the end, where for a
length of 10 feet a narrow band of magnetite, garnetite, etc., is visible.