British Columbia, Canada

Main commodities: Mo Cu
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The Mac porphyry molybdenum deposit is located in the Babine area of north-central British Columbia, Canada. (#Location: 54° 51' 36" N 125° 34' 38" W)

The country rock in the Mac area is predominantly composed of Carboniferous to Permian Cache Creek Group volcanic and sedimentary rocks which, in the deposit area consist of hornfelsed mafic volcanic rocks. These rocks are intruded by a 142 Ma siliceous, leucocratic quartz monzonite stock of the 136 Ma Francois Lake Intrusive Suite.

The main mineralised zone, the Camp Zone, comprises an oxidised multi-directional, molybdenite-bearing stockwork of quartz veins developed within pervasively kaolin altered alaskite. Molybdenite coats the walls of the 2 to 25 mm wide quartz veins with subordinate pyrite and traces of chalcopyrite. Traces of molybdenite are disseminated between the veins. Molybdenite also occurs in quartz veins and disseminations in the siliceous biotite hornfels.

Three distinct zones of porphyry molybdenum ± copper mineralisation occur within a 3.5x2 km alteration zone (the Camp, Peak and Pond zones).

The Camp zone has an areal extent of 750x350 m and persists to a depth of 150 m.

The Peak zone is 1 km to the south and extends over an area od 1000x500 m, while the Pond zone, which is 1 km north of the Camp zone, lies within a 2x2 km area. The Camp and Peak zone belong to the same porphyry system, with more Cu at Peak than at thje Camp zone.

Geostatistical resource estimates in 1996 at 0.06% MoS2 cut-off, include:

    52 Mt @ 0.14% MoS
2 equivalent, ( indicated resource),
    47 Mt @ 0.12% MoS
2 equivalent, (inferred resource)

The most recent source geological information used to prepare this summary was dated: 1997.    
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd.   Unauthorised copying, reproduction, storage or dissemination prohibited.

  References & Additional Information

Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge.   It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published.   While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations.

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