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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  03-Jun-2015 by Nicole Barlow (NB)

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NMI
Name NORTH BRENDA-JEFF 43, JEF NO. 43, JEFF 43, TRE 19, DDH24 Mining Division Osoyoos
BCGS Map 082E091
Status Showing NTS Map 082E13W
Latitude 049º 56' 33'' UTM 11 (NAD 83)
Longitude 119º 59' 43'' Northing 5536539
Easting 285098
Commodities Copper, Molybdenum Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Plutonic Rocks
Capsule Geology

The North Brenda-Jeff 43 showing is located approximately 6.5 kilometres north of the Brenda mine open pit (MINFILE 092HNE047) and 25.5 kilometres northwest of Peachland.

The area is underlain by porphyritic quartz diorite of the Early Jurassic Pennask Batholith, locally known as the Brenda stock. Alteration of quartz diorite is generally confined to fractures and to narrow alteration envelopes around those fractures. Four main alteration assemblages have been noted: quartz-hematite-pyrite, chlorite-epidote-potassium feldspar, biotite-chalcopyrite, and chlorite.

The showing was part of the extensive property holdings of Noranda Exploration Company Ltd. in the 1960s. Numerous trenches, roads, and drillholes were left in this general area by Noranda, including a trench where chalcopyrite, malachite and molybdenite mineralization is exposed.

The results of Noranda's exploration were not filed for assessment, but other sources (Minister of Mines Annual Report 1967, page 205-206) report that the drilling located a mineralized breccia zone. The zone was thought to be acute in plan, concave to the west and narrowing to the north. It measured approximately 140 by 25 metres. The breccia is an explosive type developed in porphyritic quartz diorite with a biotite-rich matrix. The rock is cut by veins of quartz-microcline and quartz with epidote and calcite. Intense chlorite alteration occurs in and near the breccia, partly on numerous faults and shears, which also show sericitic and argillic alteration in places. Specular hematite, pyrite, chalcopyrite and molybdenite occur partly in the veins and fractures and partly disseminated in strongly altered rock.

In the 1987, a diamond drill hole (DDH 24) yielded 0.23 per cent copper over 126.0 metres (Assessment Report 16750).

In 1970, Arrow Inter-America completed an airborne magnetic survey, totalling 752 line-kilometres, on the area as the Tic and Toc claims. In 1975 and 1976, Canadian Occidental Petroleum carried out geological mapping and rock and soil geochemical surveys on the area as the Tre claims. In 1987, Brenda Mines Ltd. drilled nine holes, totalling 723 metres, in the North Brenda- Jeff 43 area. No results were filed on this program. During 2006 through 2012, Bitterroot Resources completed programs of rock, silt and soil sampling, geological mapping, 147.6 line-kilometres of ground magnetic surveys and a 66.2 line-kilometre ground induced polarization survey on the area as the North Brenda property.

Bibliography
EMPR AR 1965-163; 1966-184; *1967-205,211; 1968-215
EMPR ASS RPT 2701, *5685, *5691, 6062, *16750, 30902, 32070, 32788, 33743
EMPR EXPL 1975-E28; 1976-E31
EMPR GEM 1970-391; 1971-288; 1974-64
EMPR OF 1994-8
EMPR PF (Bruaset, R.U. (1987-11-12): Notice of Completion of Work - Mineral Exploration Property - North Brenda)
EMPR RGS 29
GSC MAP 538A; 15-1961; 1701A; 1712A; 1713A; 1714A; 1736A;
7686G; 8522G
GSC OF 409; 637; 736; 1969
CIM Special Volume 15, pp. 186-194

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