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File Created: 11-Mar-2012 by Karl A. Flower (KAF)
Last Edit:  09-Jun-2020 by Nicole Barlow (NB)

Summary Help Help

NMI
Name SOM Mining Division Nelson, Trail Creek
BCGS Map 082F041
Status Showing NTS Map 082F05W
Latitude 049º 24' 40'' UTM 11 (NAD 83)
Longitude 117º 59' 20'' Northing 5473629
Easting 428268
Commodities Gold, Silver Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Plutonic Rocks, Kootenay
Capsule Geology

The Som showing is located between Cayuse and Little Cayuse Creeks, on the northwestern shore of Lower Arrow Lake.

The area is underlain by an unnamed Jurassic pluton just to the west of its contact with Mount Roberts formation a sequence of Pennsylvanian Permian sediments. Intrusive dikes ranging in composition from lamprophyre to syenite cut the granite on the property and generally strike steeply northwest or northeast.

Locally, several erratically developed zones of milled granite with hematite/magnetite on fractures and some disseminated pyrite occur along with two parallel- trending syenite dikes 2 to 4 metres in width. The strike of the dikes was approximately 350° with near- vertical dips.

Quartz veining occurs in the granodiorite as single quartz veinlets to more well developed sheeted stockwork type zones. The veins range in width from hairline fractures with quartz coatings to individual veins over 15 centimetres wide, with 1 to 2 centimetres wide being the most abundant. Limonite and pyrite as well as chalcopyrite and molybdenite were noted within the veins. Alteration consists of chlorite, carbonate, epidote and garnet with sericite.

Disseminated pyrite and rare molybdenite occurs along the margins of the veins, often over thicknesses 3 to 4 times the width of the accompanying vein. Some of the vein margins also displayed a banded mylonitic texture, especially in the areas of more closely spaced stock-work -style veining. The strike of the veining was generally to the northeast varying from 20 to 45 degrees with moderate dips to the northwest.

In 2005, five rock samples were collected returning values up to 255 parts per billion gold, 27 grams per tonne silver and anomalous values in copper, bismuth and molybdenum (Assessment Report 27843).

Bibliography
EMPR ASS RPT 27843, 29270
Höy, T. (2010-04-13): Technical Report – Geology, Mineralization, and Exploration, Deer Park Property.

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