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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  26-Mar-2018 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name BAKER, JODI, SLY, JODI-SLY, SPHINX Mining Division Fort Steele
BCGS Map 082F067
Status Developed Prospect NTS Map 082F10E
Latitude 049º 36' 30'' UTM 11 (NAD 83)
Longitude 116º 39' 22'' Northing 5495142
Easting 524845
Commodities Molybdenum, Tungsten Deposit Types L05 : Porphyry Mo (Low F- type)
K07 : Mo skarn
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Baker (Jodi-Sly) molybdenum-tungsten occurrence is located on a ridge separating Gray and Baker creeks, approximately 13 kilometres south west of Crawford Bay.

The area is predominantly underlain by a north trending sequence of argillite and quartzite units of the Middle Proterozoic Mount Nelson Formation (Purcell Supergroup). This assemblage abuts the older conglomerate unit of the Upper Proterozoic Toby Formation (Windermere Supergroup) to the west and sedimentary rocks of the Dutch Creek Formation (Purcell Supergroup) to the east. These have been intruded by a small plug of quartz monzonite possible related to the Cretaceous Bayonne Batholith.

Locally, molybdenite-pyrite ± magnetite mineralization occurs in a stock work of very thin quartz veins in a quartz monzonite and to a lesser extent in a shattered, sericite-rich, phyllitic, white quartzite, which is interbedded with pyroxene-garnet skarn-altered dolomite containing disseminated scheelite and sphalerite. The dominant fracture set parallels the north- striking trend of the regional cleavage. Phyllic, potassic and argillic alteration occurs as envelopes around the mineralized veins. Aplite and quartz monzonite dikes and plugs are numerous and suggest that the altered Mount Nelson rocks are underlain by an offshoot of the Cretaceous Bayonne Batholith.

Mineralization has been identified, by drilling and on surface, over an area of approximately 1000 by 250 to 300 metres wide and to a depth of at least 300 metres. Mineralization remains open to the west and at depth.

In 1980, diamond drilling yielded an average of 0.03 per cent molybdenum with up to 0.175 per cent molybdenum over 3.0 metres from hole BC 80-5 and 0.050 per cent tungsten over 3.0 metres from hole BC 80-4 (Assessment Report 8628).

In 1997, the last seven holes drilled all contained visible molybdenite but the only assays reported are from the sixth hole, in which a 29.0-metre interval averaged 0.0769 per cent molybdenum, including 0.232 per cent molybdenum over 6.0 metres (Exploration in BC, page 49). Later reports indicate drilling yielded an average of 0.03 to 0.038 per cent molybdenum over lengths of 90 to 230 metres (Assessment Report 27819).

In 2005, diamond drilling (hole SX05-002) yielded up to 0.10 per cent molybdenum over 47.0 metres, including 0.308 per cent molybdenum over 7 metres, while drill hole SX05-012 yielded 0.057 per cent molybdenum over 77 metres, including 0.647 per cent molybdenum over 1 metre (Assessment Report 27990).

In 2006, drilling results included hole SX06015 yielding 0.042 per cent molybdenum over it's entire 481.89 metre length, including 79 metres yielding 0.068 per cent molybdenum, and hole SX06016 averaging 0.045 per cent molybdenum over 47.0 metres, including 6.0 metres yielding 0.135 per cent molybdenum along the contact zone of the quartz monzonite intrusive body (Assessment Report 29126).

In 2007, drill hole SX07022 intersected 0.077 per cent molybdenum over 30.0 metres, including 9.0 metres yielding 0.104 per cent molybdenum, while hole SX07025 intersected 0.085 per cent molybdenum over 29.0 metres, including 19.0 metres yielding 0.104 per cent molybdenum and 3.0 metres yielding 0.276 per cent molybdenum (Assessment Report 30196).

In 2009, diamond drilling (hole SX09027) yielded 0.07 per cent molybdenum over 53.30 metres, including 0.11 per cent molybdenum over 7.15 metres (Assessment Report 31878).

In 2006, an NI43-101 compliant inferred resource estimate of 53,00 ,000 tonnes averaging 0.035 per cent molybdenum with a cut-off of 0.01 per cent molybdenum was reported (Assessment Report 30196). In 2008, modelling of the deposit yielded an indicated resource estimate of 41,450,000 tonnes at 0.041 per cent molybdenum with a 0.03 per cent molybdenum cut-off and an inferred resource of 37,180,000 tonnes at 0.040 per cent molybdenum with a 0.03 per cent molybdenum cut-off (Assessment Report 31878).

During 1978 through 1984, Cominco completed programs of soil and silt sampling, geological mapping, surface work, five diamond drill holes, totalling 1005 metres, and eight percussion drill holes, totalling 627.9 metres, on the area as the Baker claims. In 1997, Barkhor Resources completed nine diamond drill holes, totalling 2500 metres.

During 2002 through 2009, Eagle Plains Resources completed programs of rock, silt and soil sampling, 135.0 line-kilometres of airborne geophysical surveys, a ground induced polarization survey and 40 diamond drill holes, totalling 11,028.4 metres, on the area as the Sphinx property.

Bibliography
EMPR ASS RPT 7416, *8628, 11604, 12935, *27819, *27990, *29126, *30196, *31878
EMPR EXPL *1997-49
GCNL #238 (Dec.11), 1997; #23 (Feb.3), 1998

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