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File Created: 26-Mar-2014 by Nicole Barlow (NB)
Last Edit:  03-Sep-2014 by Sarah Meredith-Jones (SMJ)

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NMI
Name FRED, ZAKCO Mining Division Omineca
BCGS Map 093F076
Status Showing NTS Map 093F15W
Latitude 053º 46' 26'' UTM 10 (NAD 83)
Longitude 124º 55' 41'' Northing 5960090
Easting 372940
Commodities Gold, Molybdenum Deposit Types
Tectonic Belt Intermontane Terrane Overlap Assemblage
Capsule Geology

The Zur 5 (Fred) occurrence is located on a small hill located approximately 2.8 kilometres west of the northwest arm of Bentzi Lake.

The oldest rocks exposed in the area are dull green intermediate volcanics of the Middle Jurassic Hazelton Group. They occur along the north-facing slopes and low-lying areas in the northern part of the area. Lithologies include reworked andesitic crystal tuffs and plagioclase-phyric flows. These rocks have been thermally metamorphosed to a fine-grained mottled pale pink and green rock with relict plagioclase phenocrysts where they are intruded by a biotite quartz monzonite plug. The intrusion is salmon coloured, medium grained and contains from 3 to 4 per cent weakly chloritized biotite. It may be correlative with the Jura-Cretaceous Francois Lake suite of intrusions that crops out predominantly to the north of the area. Grey chert pebble conglomerates (Cretaceous Skeena Group equivalents?) overlie Jurassic Hazelton Group rocks. Locally they are weakly silicified and are cut by veinlets of quartz-pyrite. The conglomerates are in turn overlain by pale grey-green hornblende phyric dacite to andesite flows that may be correlative with the Cretaceous Kasalka Group.

Maroon to cream-coloured, hematite-stained and variably argillically altered plagioclase phyric andesite to dacite flows, flow-banded rhyolites, rhyolite breccias, and associated felsic to intermediate lapilli and crystal tuffs, unconformably overlie all older rock units. These rocks are considered to be part of the Ootsa Lake Group. The flow-banded rhyolite forms a ridge that trends north westerly across the area. This unit appears to be part intrusive and part extrusive; it cuts all older stratified rocks in the area and in part overlies the argillically altered andesite flows. It is interpreted to be part of a flow dome complex.

Locally, a rhyolite crackle breccia with traces of pyrite and specular hematite is hosted by a rhyolite dome structure. The breccia exhibits angular to subrounded fragments of potassium altered rhyolite, with lesser sedimentary and granitic fragments, supported by a matrix of dark grey specularite and minor earthy red hematite. The breccia zone is hosted within a 25 metre wide structure that has been traced about 285 m along strike. The breccia trends 055 degrees and appears to be steeply dipping. It cuts fine clastic sediments that are weakly hematitic and contain abundant quartz veins with potassic altered selvages.

In 1996, a grab sample (62347) assayed 0.967 gram per tonne gold (Assessment Report 25313). In 2009, a sample of brecciated felsic volcanics with manganese-healed fractures assayed 0.109 per cent molybdenum (Assessment Report 33670).

In 1988 and 1989, Noranda completed programs of geological mapping and rock, soil and silt sampling, seventeen trenches and a ground magnetometer survey on the area as the HC claims. During 1995 through 1997, Phelps Dodge completed programs of geological mapping and rock and soil sampling. In 2000 and 2001, the area was prospected by G.N. Goodall. During 2007 through 2012, Strategic Metals completed programs of geological mapping, rock, till and soil sampling, an airborne electromagnetic and magnetic survey and forty-one percussion drill holes, totalling 944.9 metres, on the area as the Zakco claims.

Bibliography
EMPR EXPL 1988-C158; 1992-69-106
EMPR FIELDWORK 1992, pp. 475-481; 1993, pp. 9-14; 1994, pp. 167-170, *177-191, 193-197; 1999, pp. 173-184
GSC MAP 1131A; 1424A
GSC MEM 324
GSC P 90-1F, pp. 115-120

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