The map covers an area to the east of Beaverdell, between the Kettle and
West Kettle rivers. It focuses on rocks of the Wallace Formation,
previously correlated with the Anarchist Schist in the Bridesville area, but
now thought to be Triassic in age and correlative with the Brooklyn
Formation of the Greenwood area. The Wallace Formation is dominated by fine
to medium-grained clastic sediments which are essentially unmetamorphosed,
though they do show extensive hornfelsing from Jurassic plutons. Limestone
and greenstone members occur in the Crouse Creek area, and are the lowest
exposed units. Except for one small area, to the west of Crouse Creek, no
penetrative deformation is observed.
Intrusive rocks envelope the Wallace
formation. These comprise several major granodiorite plutons and stocks in
the west and central part of the map area, designated the Westkettle
batholith (Reinecke 1915) and probably correlative with the mid-Jurassic
Nelson Intrusions. Templeman-Kluit (1989) has also ascribed some of the
granodiorites to the north of the area as being part of the Jura-Cretaceous
Okanagan Batholith. Megacrystic granite of the Coryell suite forms two
intrusions in the east and south of the map area, as well as the small
Beaverdell stock. Tertiary-age porphyry dykes abound through the area
intruding all older lithologies. Gold veins of the Beaverdell camp and the
surrounding area are histed in the Wallace Formation and Jurassic intrusions
but are believed to be genetically related to the Tertiary intrusions.
Disseminated and porphyry style copper mineralization of the GK property is
of unknown age.
