Detailed Summary Report
Assessment Report: 17297
| Property Name |
Central 89 17297.pdf |
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| Location |
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| Mining Divisions | Nanaimo | |||||||||
| Mining Camp | Island Copper Area | |||||||||
| Title | Assessment Report on the Central 89 Group | |||||||||
| Report Year | 1988 | |||||||||
| Number of Pages | 271 | |||||||||
| Statements of Work | n/a | |||||||||
| Affidavit Date | 1988-01-08 | |||||||||
| Off Confidential | 1989-01-08 | |||||||||
| Claims | Mining Lease 34 | |||||||||
| General Work Categories | Drilling, Geochemical | |||||||||
| Operators |
BHP-Utah Mines |
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| Owners |
Milbourne, G. BHP-Utah Mines |
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| Authors |
Clarke, G.A. Fleming, J.A. Burt, P.D. |
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| MINFILE Nos | 092L 099, 092L 136 | |||||||||
| Commodities | Copper, Molybdenum/Molybdenite | |||||||||
| Work Done |
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| Keywords | ||||||||||
| Related Report(s) | 13346, 12271, 11366, 8150, 7427 | |||||||||
| File(s) |
17297.pdf |
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| Geological Summary |
The Bay (Frances) Lake area, located immediately northwest of the Island Copper pit, is underlain by faulted, locally highly fractured, hydrothermally altered andesitic fragmental rocks with textures ranging from fine ash tuffs to volcanic breccias. Quartz- feldspar porphyry dykes with associated sericite-pyrophyllite wallrock alteration cuts the tuffs. Copper mineralization occurs as narrow, high grade chalcopyrite bearing structures cutting propylitically altered fragmental andesites on the southwest corner of the lake, as disseminated chalcopyrite in biotite-chlorite-magnetite altered and silicified andesites in a small tabular deposit grading >0.30 per cent copper across the north of the lake and as a broad expanse of low grade <0.30 per cent copper across the north side of the lake in biotite-chlorite-magnetite and quartz-pyrite altered tuffs.
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