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File Created: 12-Mar-87 by Larry Jones(LDJ)
Last Edit:  08-Oct-97 by Larry Jones(LDJ)

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NMI
Name NORTH WOW FLAT, NORTH WOW, NORTH WOW LAKE, WOW LAKES, RKL, OLIVER, NORTH FLATS Mining Division Osoyoos
BCGS Map 082E023
Status Developed Prospect NTS Map 082E04E
Latitude 49º 12' 44" N UTM 11 (NAD 83)
Longitude 119º 34' 37" W Northing 5454244
Easting 312327
Commodities Uranium Deposit Types B08 : Surficial U
Tectonic Belt Intermontane Terrane Overlap Assemblage, Plutonic Rocks
Capsule Geology

The North Wow Flats uranium occurrence lies about 4 kilometres northwest of Oliver, British Columbia and 1.5 kilometres north of the former Standard mine (082ESW091). The property was examined and evaluated by D.G. Leighton for British Newfoundland Exploration Ltd. in 1979. A total of 92 augerholes were drilled into unconsolidated sediments.

Regionally, the area is principally underlain by medium grained intrusive rocks that form the Jurassic Oliver plutonic complex. To the immediate south, the complex cuts Carboniferous to Permian Kobau Group metasedimentary rocks. On its northern margin, the intrusive mass is in contact with Eocene volcanics and sediments of Penticton Group. The Kettle River Formation, consisting of conglomerate, arkose and rhyolite tuff, is overlain by the Springbrook and Marron formations.

Bedrock types to the south of North Wow Flats include laminated quartz schist or dirty quartzite, massive and laminated quartzite and minor limestone of the Kobau Group. In the North Wow Flats area, the Oliver plutonic complex is composed almost entirely of biotite- hornblende quartz monzonite. The southern contact with the Kobau Group is approximately 2.5 kilometres to the south of Sink Lake. Three distinct phases have been identified. From youngest to oldest these are: a central core of massive medium-grained garnet-muscovite quartz monzonite which is surrounded by porphyritic biotite quartz monzonite to the south and biotite-hornblende quartz monzonite north of the core. Hornblende diorite occurs in several small areas to the north. Border phases and dikes related to the Oliver plutonic complex include lamprophyre, augite-plagioclase porphyritic andesite, micro-quartz diorite, albite porphyritic dacite, diabase, fine-grained quartz monzonite and aplite. Bedrock uranium mineralization consists of pegmatite accumulations, uraniferous limestone, uranium-pyrrhotite and fracture-hosted uranium (Assessment Report 7398). The latter are common in the Wow Lakes area.

The Wow Lakes (see also South Wow, 082ESW178) lie along a north-northeast trending linear which separates muscovite-garnet quartz monzonite to the east from porphyritic biotite quartz monzonite to the west. To the immediate north, a narrow transitional zone along the linear consists of porphyritic muscovite-biotite quartz monzonite.

The North Wow Flat is a postglacial, lacustrine-playa, closed basin type of deposit which is forming within a few metres of the surface by enrichment of uranium and other elements by evaporative pumping. The Wow Lakes are considered a type deposit of a closed basin where hydrological conditions tend to become hypersaline. The uranium is concentrated, within grey and white clays (marl muds and sands) containing gypsum crystals, as a salt from saline oxidizing groundwaters in an arid environment and there is a downward trend of uranium concentrations in the deposit. No uranium minerals have been recognized. The underlying rocks are sources of labile uranium with possible contributions from mineralized fault zones. However, this is one type of young uranium deposit that can be detected by gamma ray spectrometry.

The North Wow Flats uranium occurrence consists of two areas, the North Wow Lake and North Flats. The North Wow Lake is reported to cover 9200 square metres surface area. A 1.5-metre thick layer at surface is reported to average 0.05 per cent uranium with a maximum of 0.165 per cent uranium over a one-half metre thick interval (Culbert, 1979). The results were obtained from 68 augerholes. The North Flats covers 4000 square metres surface area. The results from 4 augerholes was an average of 0.014 per cent uranium with a maximum of 0.026 per cent uranium over a one-half metre interval (Culbert, 1979). The deposit was 4.0 metres thick extending from the surface. The North Wow Flat deposit contains about 11.5 tonnes of uranium (Canadian Journal of Earth Sciences, 1984, page 561).

Bibliography
EMPR ASS RPT *6360, 6504, 6532, *6949, *7398, 7670
EMPR EXPL 1977-E22,E26; 1978-22,23,26; 1979-25
EMPR FIELDWORK 1977, pp. 7-13; 1978, pp. 12-15; 1983, pp. 17,246-259;  1988, pp. 19-25
EMPR MAP 29; 35 (Revised); 39
EMPR OF 1989-2, 1989-5; 1990-32, p. 19
GSC MAP 341A; 538A; 539A; 541A; 15-1961; 1736A; 2389
GSC OF 481; *551; 637; 1505A; 1565; 1969
GSC P 77-1A, p. 31
CIM BULL Vol. 71, No. 783, May 1978, pp. 103-110
CJES *Vol. 21, May 1984, pp. 559-566
ECON GEOL Vol. 77, No. 5, 1982, pp. 1176-1209
IAEA TECDOC 322 Surficial Uranium Deposits, Vienna, 1984, pp.  179-191
Bates, D.V., J.W. Murray and V. Raudsepp (1980): Royal Commission of  Inquiry, Health and Environmental Protection, Uranium Mining;  Commissioners' Report, October 30, 1980, Vol. 1, pp. 35-36,  183-184
*Culbert, R.R. (1979): Post-Glacial Uranium Concentration in South  Central British Columbia, Royal Commission on Uranium Mining,  Accession List #2109S01, 20 pages
Culbert, R.R. (1979): Uranium Equilibrium - Disequilibrium as  Observed in the Natural Environment in British Columbia, Royal  Commission on Uranium Mining, Accession List 2017S, 15 pages  with Appendices
Culbert, R.R. and D.G. Leighton (1988): Young Uranium; Ore Geology  Reviews Vol. 3, pp. 313-330

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