62

rust, so that boundaries of any mineralized area could not be made out.
Because of the mineralization in the fault zone, it would appear that
mineral deposition took place in both the shear zone and the fault, or in
other words that the mineral deposits are younger than the fault. The
mineralization in the Big Rig fault can be explained, however, in other
ways. The ore in the fault zone west of the Winze vein may be a con-
tinuation of the Winze vein paralleling the fault, or it may be a part of

True North

No.3 Vein

400

Scale of Feet
(e) 200

Geological Survey, Canada.

Figure 13. Plan showing known veins and faults on Porter Idaho and Prosperity
groups.

the Winze vein dragged west by movement along the fault, or it and the
general mineralization of the fault zone may not represent the Winze
vein at all, but may represent a mineralized bed of rock that has been
truncated by the fault. As the fault has been drifted on in only one level,
it is difficult or impossible to state with certainty the relation of the
mineralization to the fault, that is the age relation between the ore
deposits and the fault is not established.