Moose River Basin: geology and mineral potential - Geology Ontario

Moose River Basin
TABLE 3.1
SAND SAMPLE INTERVALS, AND CORRESPONDING DEPTHS OF DRILL
HOLES, USED IN THIS STUDY. LOCATION OF DRILLHOLES SHOWN IN
FIGURE 1.3.
Sampled
Interval Depth Elevation
Hole (sample numbers) (metres) (metres)
75-02 125-153 94-106 55-43
166-176 113-125 37-25
75-03 165-178 112-119 37-31
185-189 121-123 28-26
75-05 26-39 20-29 81-72
78-102 60-84 42-17
75-06 57-138 47-126 46-31
ing recent exposure of the Pleistocene-Cretaceous contact on Adam Creek
(50 010'N, 82 007'W) (Figure 3.1) and a small bank exposure on the Missinaibi
River (50 022'N, 82 032'W) (Figure 3.1).
Heavy mineral separations of samples from drillholes 75-02 and 75-06 of
the -60 -f 120 mesh (2Z8 to 3Z8) fraction were obtained using tetrabromethane
(S.G. = 2.95). These separates were mounted semipermanently in Aroclor
number 4465 (n = 1.664 to 1.667), identified and described with a petrographic
microscope. Three hundred grains were point-counted and identified from each
slide and the values converted to percentages for each mineral species for the
59 samples. Whole sand samples from all four holes and field work were also ex
amined and described with a binocular microscope and finally, a detailed carbo
nate analysis of all samples was done using Chittick apparatus as described by
Dreimanis (1962). All data is listed in the accompanying appendices.
PETROGRAPHY OF THE SANDS
Outcrop Samples
Several sand outcrops in the southern part of the basin were sampled and
described. A recent exposure of the Pleistocene-Cretaceous contact on Adam
Creek revealed the section shown in Figure 3.1. Another bank outcrop at water
level on the Missinaibi River underlain by a small amount of bright red clay
and assumed to be Cretaceous is also illustrated in Figure 3.1.
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