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File Created: 06-Sep-1989 by George Owsiacki (GO)
Last Edit:  22-Jun-2009 by George Owsiacki (GO)

Summary Help Help

NMI
Name MAYBE, CARIBOO, BOO Mining Division Cariboo
BCGS Map 093A085
Status Developed Prospect NTS Map 093A14E
Latitude 052º 50' 43'' UTM 10 (NAD 83)
Longitude 121º 11' 44'' Northing 5856585
Easting 621524
Commodities Zinc, Lead, Silver Deposit Types E13 : Irish-type carbonate-hosted Zn-Pb
Tectonic Belt Omineca Terrane Cariboo
Capsule Geology

The Maybe occurrence and surrounding area are underlain by three rock formations which strike northwest and appear to dip northeast. The rocks lie along the southwest flank of a large synclinorium and are assumed to belong to the Hadrynian to Cambrian Cariboo Group. The first formation is a thick sequence of grey to white medium-grained marble limestone and dolostone. The second is a complex sequence of black, grey-green and light grey phyllite containing numerous beds or lenses of medium grey to black limestone and minor dark quartzite. This formation underlies most of the occurrence area and hosts lead-zinc mineralization. The third formation is a thick monotonous assemblage of grey-green phyllite and minor medium green quartzite.

Rock types intersected in diamond drilling belong to the aforementioned second formation and have been further subdivided into three units. The uppermost of the three is a black banded phyllite unit consisting almost entirely of finely laminated black graphitic phyllite. The next is a complex sequence of limestone-phyllite consisting of short, often thick, discontinuous black to medium grey limestone beds and lenses interbedded with, and interfingering with, an array of light grey, greenish grey and brownish grey phyllites. Minor fragmental rock (greywacke) occur closely associated with the limestone. A continuous black graphite phyllite member occurs near the base of this unit and serves as a marker horizon. The third and lowest unit is a black phyllite-quartzite section consisting of black banded phyllite, minor limestone, minor grey phyllite and a thick dark grey quartzite member at its base. The three units appear structurally conformable and have an average strike of 300 degrees and dip of 55 degrees northeast.

Numerous intersections of sphalerite-galena mineralization occur in these three units. Strong "bull" quartz veining occurs within and adjacent to the mineralized zones, and in some cases carry galena-sphalerite mineralization. Most of the higher grade zones have a core of massive sphalerite-galena mineralization up to one metre wide contained within a buff to greenish brown matrix consisting of iron carbonate, quartz and sericite. Small clots and veinlets of massive galena-sphalerite often occur peripheral to these core zones and create assay widths up to six metres.

The mineralized zones can be structurally aligned to form three systems, referred to as the Main zone, Upper zone and Lower zone. The Main zone contains the majority of the surface showings and has the most apparent continuity and can be traced for a distance of 160 metres. The Upper zone lies north of the Main zone and is stratigraphically above the Main zone. It has been traced for a distance of at least 180 metres but is not exposed at surface. The Lower zone lies south, and stratigraphically below the Main zone. It has been traced for a distance of 50 metres and is exposed on the surface in two areas. The three zones strike approximately 300 degrees and dip 50 to 60 degrees northeast, conformable to bedding attitudes of the hostrocks. The Main and Lower zone show a rapid decrease in grade with depth.

At a 1 per cent combined lead-zinc cutoff, the lower part of the Main zone contains 200,000 tonnes of continuous mineralization, and probably a similar volume of material occurs combined in the other zones, for a total of 400,000 tonnes at 4 per cent combined lead-zinc (Assessment Report 17357, pages 4,5).

The property was initially staked in 1986 and 1987 to cover lead-zinc mineralization exposed by logging road cuts. There is no record of any previous work done here although the area has undoubtedly been explored for placer gold since the Cariboo Gold Rush. The claims were optioned to Gibralter Mines Limited in September of 1987 and 20 drillholes totalling 3044.3 metres were completed that year. The option was terminated late in 1988. Gibralter's drilling was concentrated along a 400 metre strike length to test mineralized surface showings at depths of some 60 metres or greater. Sable Resources Ltd. considered the property had untested potential to host a stratabound lead-zinc deposit and a programme consisting of geological and geochemical surveys and trenching was completed in 1989 to evaluate this situation. In 1998, Barker Mineral Ltd. conducted geophysical and soil surveys which extended the surface strike length of the known mineralization to 1.5 kilometres.

Bibliography
EMPR ASS RPT *17357, 19027, 25437
EMPR BULL 47
EMPR EXPL 1988-C149; 1997, pp. 13-1-13-12
EMPR OF 1992-1; 2001-11
EMPR PF (Barker Minerals Ltd. Website (Mar. 1999): Cariboo Prospect, 1 p.; Barker Minerals Ltd. brochure)
GSC MAP 1424A; 3-1961; 59-1959; 561A; 1538G
GCNL #107(June 5), 2000

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