The Seymour Arm map area contains 281 recorded mineral occurrences. The
western section of the map sheet is underlain by the Omineca crystalline belt which
includes the Adams Plateau and Barriere areas. Underlying stata include metasedimentary
and metavolcanic rocks of the Paleozoic Eagle Bay Assemblage. The assemblage has a complex
deformational history involving multiple stages of thrust faulting and folding during the
Jura-Cretaceous which produced strongly foliated and overturned rocks trending northwest
and dipping northeast. These Paleozoic rocks are intruded by mid-Cretaceous granodiorite
and quartz monzonite, such as the Baldy batholith, and Early Tertiary quartz-feldspar
porphyry, basalt and lamprophyre dykes. These are all locally overlain by Miocene plateau
lavas. The eastern part of the map sheet is dominated by the north end
of the Kootenay Arc, a northerly trending belt of Late Proterozoic to Late Paleozoic
metasedimentary and metavolcanic rocks that are characterized by tight to isoclinal folds
and generally west verging thrust faults. Lowermost within this assemblage is the
Hadrynian Horsethief Creek Group (Windermere Supergroup), which is overlain by a Hadrynian
to Lower Cambrian succession that includes the Hamill Group, the Mohican Formation, the
Badshot Formation and the Lower Cambrian and younger Lardeau Group. The Kootenay Arc rocks
are flanked on the west by the Precambrian-Paleozoic(?) Shuswap Metamorphic Complex.
This plot was created using The Map
Place.
Several types of deposits occur in the map area. Broken Hill type
Pb-Zn-Ag±Cu deposits include River Jordan (082M
001), Ruddock Creek (082M
082, 083,
084),
Cottonbelt (082M
086) and CK (082M
224). These deposits range in size from one million to five million tonnes, with
grades ranging from 2 to 5 per cent zinc, 2.5 to 6.5 per cent lead and up to 50 grams per
tonne silver.
Noranda/Kuroko
massive sulphide Cu-Pb-Zn deposits include Harper Creek (082M
009), Homestake (082M
025), Bowler Creek (082M
138, 139),
Rea Gold (082M
191) and Samatosum (082M
244).
Vein
Fluorite-barite type of deposit is represented by the Spar (082M
007), which has a resource of 1.4 million tonnes of 23.5 per cent fluorite and 5.2 per
cent SrSO4. The nearby Rexspar (082M
021) is a Volcanic-hosted U deposit, with a resource of 1,114,385 tonnes
grading 0.066 per cent uranium. The J & L (082M
003) is probably an example of an Irish-type carbonate-hosted Zn-Pb deposit.
The indicated (probable) resource of the Main zone is 1,700,000 tonnes grading 2.64 per
cent lead, 4.43 per cent zinc, 7.38 grams per tonne gold and 75.9 grams per tonne silver.
The Dimac (082M
123) is a W
Skarn. Oro Veijo Dolomite (082M
254) contains 25 million tonnes grading 98 per cent dolomite. Placer garnet is found
at Stitt Creek (082M
260). Nepheline syenite occurs at Trident Mountain (082M
173).
BC Geological Survey Publications for
NTS 082M
