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fairly readily by sliding layer on layer, but the older complex

of deformed and largely massive Hazelton rocks bolow was sub jected
to great and irregular strain, and adjustment was to a considerable
extent’ by fracturing and shearing. After the granitic rock had
started to solidify, but before much cooling set in, mineralizing
solutions were given off and tended to seek out tho fractures,
shear zones, and bedding planes. Mineralization continued over

& considerable period of time and changed in character so that at
different times different mincrals were deposited. Cooling and
consequent contraction and settling during this time tended to
close some fractures and Open others and, therefore, the solutions
continually changed their courses and deposited difierent minerals
in different places.

Similarities in the character of the mineral deposits
seem to show that all, except possibly certain tetradymite-gold
deposits, were formed by mineralizing solutions from the same
magmatic source. So far as the writer was able to discern, they
do not show any zonal arrangement. Silver-lead (low temperature)
deposits are found at all elevations from the lowest to the it)
highest (Duthie to Silver lake) and pyrrhotite-chalcopyrite and ft
arsenopyrite-gold (high temperature) deposits have a similar
range (lake Kathlyn to Iron King). Evidence from individual
deposits such as the Duthie and others on the southwestern slope
does not seem to support the common belief that better gold
values will be found at depth or toward the core of the mountain,

The mineral deposits occur under several different
structural conditions, most of which may have been developer at
the time of doming. Most of the important and large deposits

occur in fracture or sheeted zones that are fairly straight,

strike mainly toward the peak, and dip from 45 degrees to

vertical. These fracture zones are best developed in the central