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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  09-Jun-2020 by Karl A. Flower (KAF)

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Name SHARON COPPER, PAUPER (L.31G), BRENT, OAK, MONS, SHARRON Mining Division Victoria
BCGS Map 092B081
Status Prospect NTS Map 092B13W
Latitude 048º 52' 38'' UTM 10 (NAD 83)
Longitude 123º 49' 26'' Northing 5414134
Easting 439591
Commodities Copper Deposit Types G06 : Noranda/Kuroko massive sulphide Cu-Pb-Zn
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Sharon Copper prospect is located on the western side of the Chemainus River, approximately 14 kilometres north west of Duncan.

Several past-producers are located on Mount Sicker in the Cowichan uplift, one of three geanticlinal uplifts that expose Paleozoic Sicker and Buttle Lake Group rocks on Vancouver Island. Cretaceous sediments of the Nanaimo Group unconformably overlie the Paleozoic rocks; the contact is marked by a basal conglomerate containing volcanic fragments derived from the Sicker Group. The local stratigraphy is disrupted by folding, faulting (pre-Triassic as well as Tertiary) and the intrusions of diabase and gabbro sills (informally called the Mount Hall Gabbro) that are coeval with the Upper Triassic Karmutsen Formation (Vancouver Group). The target of exploration activity has been the volcanogenic, polymetallic massive sulphides that are hosted within felsic volcanic tuffs of the McLaughlin Ridge Formation (Sicker Group) and restricted to a belt running from Chipman Creek to Mount Richards, in the hangingwall of the Fulford fault.

There are four main units underlying the Sharon area: andesitic feldspar porphyry, tuff breccia and rhyolite porphyry of the McLaugh- lin Ridge Formation intruded by a dyke or sill of metadiorite. The stratigraphic sequence is poorly exposed. Textures and assemblages indicate that the area has undergone regional greenschist metamorph- ism.

Most of the original rock textures and structures have been obliterated by late shearing and extensive faulting. Structural styles are different between the lower volcanics and the upper sediments of the Paleozoic rock. The volcanics exhibit polyphase deformation, resulting in cataclastic schists. Adjacent sediments, interbedded cherts, siltstones and cherty tuffs, appear undeformed with only tilting or broad open folding. A major portion of the volcanic rocks exhibit strong, steeply dipping axial plane cleavage. Severe alteration has removed most indications of bedding, but isoclinal folding can be inferred from fold structures and extension joints perpendicular to lineations. An additional phase of folding, or a continuation of the first phase, is shown by small, tight isoclinal folding of axial plane cleavage. A possible third phase is indicated by box folds displayed by well foliated units in Copper Canyon.

Sulphides are hosted by extremely sheared chlorite-sericite schist. Slabbed and polished rock surfaces have revealed that the schists were coarse lapilli tuffs. The sulphides are concentrated in two 10-metre wide horizons, forming the core of an antiform. Adjacent to the chlorite schists is the intrusive quartz-albite porphyry, which appears to be conformable. Sulphides, pyrite with very minor chalcopyrite, are generally semi-massive to coarsely disseminated. The sulphides are recrystallized after deformation but appear to have undergone some later shearing. Similar sulphides are also encountered in fractures and quartz stringers in chlorite schist and in white quartz veins in gabbro.

The Sharon prospect is believed to have originally been covered by the Pauper Crown grant (Lot 31G), a Crown grant that was issued in 1903. Underground development over the years has included three parallel adits 46 metres, 1.5 metres and 11 metres in length, respectively. The longer adit also has two crosscuts, totalling about 23 metres. The crosscuts averaged 1.45 per cent copper over 11 metres, 0.71 per cent over 7 metres and 0.92 per cent over 5.5 metres (Property File - Sharon Copper Mines, Plan of workings and drill holes, 1963).

From 1977 through 1983, Esso completed various exploration programs in the area including soil sampling and geophysical surveys. In 1985, Kidd Creek Mines Limited drilled the property, intersecting 9.2 metres (4.6 metres true width) of 0.55 per cent copper, with up to 1.44 per cent copper over 2 metres (Assessment Report 14411).

In 1990, Falconbridge Ltd. completed a four hole diamond drilling program, totalling 1801.7 metres. Hole CH90-126 intersected a 5.64 metres zone of chlorite-chalcopyrite- pyrite stingers returning up to 0.57 per cent copper over 0.35 metres (Assessment Report 20957).

In 2007, Laramide Resources completed a regional program of geochemical sampling and airborne geophysical surveys on the area as apart of the Lara property.

EMPR AR 1903-250; 1923-274; 1924-368; 1927-339
EMPR ASS RPT 936, 6548, 7323, 11116, 12379, 13744, *14411, 17649, *20957, 29840, 31970
EMPR EXPL 1977-E105; 1978-E121
EMPR FIELDWORK 1987, pp. 81-91
EMPR OF 1988-8; 1999-2
EMPR PF (Drill logs, and plans of Sharon workings, Sharon Copper Mines, 1963; See various related documents in the Lara file (092B 129))
GSC MAP 42A; 1386A; 1553A
GSC MEM 13; 96
GSC OF 463
GSC P 1972-44; 1975-1A, p. 23; 1979-30
Carson, D.J.T. (1968): Metallogenic Study of Vancouver Island with Emphasis on the Relationship of Plutonic Rocks and Mineral Deposits, Ph.D. Thesis, Carleton University
Falconbridge File
*Holbek, P. (1980): Geology and Geochronometry of the Sharron Volcanogenic Prospect, Mt. Brenton Area, Southwestern B.C., B.Sc. Thesis, University of British Columbia
Kelso, L. (2007-11-15): Independent Technical Report and Mineral Resource Estimation – Lara Polymetallic Property
Kelso, L. (2008-04-02): Independent Technical Report and Mineral Resource Estimation – Lara Polymetallic Property