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Location: 16 km NE from Timmins, Ontario, Canada
4315 Gold Mine RoadTimminsOntario, CanadaP0N 1H0
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Dimensions Mineralization at Pamour has been drill-defined over a 3.2 km northeast strike. The zone plunges about 30º to the northeast and has been mined to a depth of about 850 m. Existing drilling suggests zone extensions below the 850 m depth is possible at both the southwest and northeast ends of the existing mining infrastructure. A parallel zone exists 500m to the north of the main Pamour mineralization which shows similar characteristics and has a 1.5 km strike length.Veins have individual widths of <1–4 m and zones of disseminated sulphides and bulk extension veins in the conglomerates occur over widths of 45 m or more. Pamour West occurs about 1,300 m southwest of the first pit of the Pamour main zone. A small pit was excavated at Pamour West that has a 500 m length and between 110 m depth at the southwest end and 60 m at the northeast end. Mineralization has been drilled from surface along a strike of 850 m through the pit and to the northeast. Underground workings have been developed on 11 levels to a depth of 700 m below surface following mineralization downwards. Drill hole assays suggest numerous subparallel veins plunging about 55º to the northeast under the pit to the full depth of the old workings. Structure The Pamour deposit is located on the north limb of an overturned north-dipping syncline. The axial surface trends east–northeast, with a moderate dip to the north of 70°. The south limb of this syncline is interpreted to have been faulted out by the Destor– Porcupine Fault, which is located to the south of the deposits. Narrow auriferous veins in the volcanic and sedimentary rocks are produced by nested conjugate sets of reverse faults developed on either side of the Pamour unconformity.Two major post-mineralization dextral faults, the Hallnor and Pamour faults, strike north to northwest, dip 60 degrees east, and offset the stratigraphy by as much as 300 m. Other post-mineralization minor subvertical faults include conjugate northwest-dextral and northeast-sinistral faults with decameter-scale displacement. Reverse faults with shallow dips (5–10º) occur predominantly in the metasediments on the west end of the mine area. Flat faults are truncated by post-mineralization faults, but their relationship with mineralization is uncertain. A talc–chlorite schist zone occurs near the southern mine area, and is interpreted to delimit the northern margin of the Porcupine–Destor Fault zone. Mineralization Gold occurs in association with narrow, quartz–ankerite extension veins, in association with pyrite in the alteration halo surrounding quartz vein stockworks, or as bulk-type mineralization sheeted quartz veins or stockwork stringers where the two other types of narrow vein structures come together. Gold occurs in two principal modes. • Free gold associated with narrow, quartz–ankerite extension veins with associated traces of sphalerite, galena, and locally arsenopyrite. Pyrite and pyrrhotite also occur within the quartz veins but are more commonly found as disseminated grains in the bleached and altered wall rock; • Disseminated pyrite–gold alteration halo around the sheeted quartz veinlets and stockworks. In general, an increase in the pyrrhotite/pyrite ratio is indicative of an increase in the gold content. Locally, in order of decreasing abundance, arsenopyrite, sphalerite and galena may occur in minor amounts. Gold occurs as electrum, with a historical gold to silver ratio of 5:1.
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