The Manigotagen Gneissic Belt, which lies immediately south of the Rice Lake
greenstone belt, represents a lithologic gradation from the low-grade metavolcanic and
metasedimentary rocks through paragneiss and migmatite to quartz dioritic and
granodioritic gneiss.
There are at least three and possibly four major periods of deformation in the Rice Lake
area (Sasseville, 1999). The resulting fold pattern is complex with overturned, doubly
plunging folds common in the Rice Lake Group rocks. The late Archean San Antonio
Formation sedimentary rocks may have only been affected by the last major period of
deformation.
There are a number of major regional fault structures in the Rice Lake area. The major
structures that trend in a generally east-west direction are the most prominent and
movement along these structures has developed conjugate shear zones that splay off to
the north and south. In addition there has probably been thrust faulting in the early stages
of the deformation of the area, however, these structures are difficult to identify.
All of the major gold occurrences in the Rice Lake area occur as quartz veins or quartz
vein systems related to structural deformation (folding and faulting) of the host rocks.
See Section 4.2 for a discussion of deposit types/models and Section 4.3 for descriptions
of the geology and mineralisation on the Bissett Mine property