18

Magnetite is the most abundant of the metallic minerals and it is
accompanied by a small amount of specularite. These were the first of
the metallics to be deposited, apparently a little before the molybdenite
which is small in amount. No pyrrhotite or arsenopyrite were observed,
but pyrite followed the molybdenite in considerable amount. Chalcopyrite
is next in abundance to the magnetite and is usually associated with a little
tetrahedrite and bornite; it replaces the gangue, magnetite, and pyrite princi-
pally. Small round grains of gold are seen in the magnetite, bearing the
same relation to it as does the chalcopyrite; otherwise the paragenesis
could not be proved. Although no ore of tin was distinguished under the
microscope, chemical analysis shows that there are traces of tin in the ore.
On the whole, this property holds considerable promise and under the
energetic policy of development which is projected, it should soon become
an important producer.

GREAT OHIO PROPERTY. General Description. The main vein on
this property is approximately 4,000 feet south of the main vein on the
Rocher De Boule, and is roughly parallel to it. The strike of the vein
parallels the contact of the batholith with the tuffs about 50 feet inside the
granodiorite at the tunnel, but farther up the hill passes into the tuffs
where they cap the batholith. There are a series of parallel fissures on
the property, but only the main one, 3 to 4 feet in width, is worthy of note.

The veins often follow small dykes of camptonite, cutting through
them or on either wall; and the dykes themselves are somewhat mineral-
ized. ‘The chief gangues are quartz and actinolite.

The ore is not evenly distributed, nor does it occur in large, well-
defined shoots, but rather in irregular bunches, or small streaks; one of
these streaks, 4 inches across, gave an assay of gold, 0-04 ounce; silver,
134 ounces; copper, 1 per cent; and the total width of the vein at this
point was 4 feet.

Table of Paragenesis of the Ores from the Great Ohio Property.
Fissuring of country rock
Dykes of camptonite
Fissuring following dykes frequently
Sericitization and silicification of country rock (granodiorite) with deposition of some
vein quartz
Formation of actinolite in the veins
Arsenopyrite, pyrite, pyrrhotite y
Maen {Not positive of position, may be later than galena-sphalerite group
Zinc blende
Tetrahedrite |
Tennantite Intimate mixture
Chalcopyrite
Galena
Crushing
Calcite and quartz
The peculiar occurrence of marcasite and siderite is shown in Plate VIB.

RED ROSE PROPERTY. General Description. There is one main vein
on this property which strikes in a direction nearly at right angles to the
veins on the Highland Boy claims. Although the vein is nominally on
the sedimentary side of the contact, the granodiorite is so near the surface
that portions of it protrude through the sediments, so that the vein is
sometimes in the granodiorite, sometimes in the sediments.

The vein strikes up the hillside and is exposed by cuts and sluicing
at intervals from 5,400 feet up to 6,500 feet elevation. The matrix in the
lower portions is of quartz and ground country rock, but farther up the