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Kiena - Val d Or District |
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Quebec, Canada |
| Main commodities:
Au
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Super Porphyry Cu and Au
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IOCG Deposits - 70 papers
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All papers now Open Access.
Available as Full Text for direct download or on request. |
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The Kiena gold mine is located within the Val d'Or district, approximately half way between Val d'Or and Malartic in Quebec, Canada and lies within the southern Abitibi greenstone belt of the Superior Province.
The Val d'Or - Malaric district is underlain by a thick sequence of north dipping and south-younging mafic to ultramafic rocks, the Malartic Group of around 2705 Ma in age. These are intruded by a diorite-trondjhemite sill complex known as the Bourlamaque batholith which has been dated at 2700 Ma. The entire volcanic sequence was juxtaposed with the metasediments of the Pontiac sub-province to the south by the major tectonic break, the Cadillac tectonic zone in the Val d'Or area which becomes the Malartic tectonic zone in the Malartic district.
Two styles of deposit are recognised in the district, namely: 1). quartz-tourmaline-carbonate lode gold veins to the east of Kiena and 2). networks of carbonate-quartz stockwork veins with auriferous suphide disseminations to the west.
Kiena is a multi-stage carbonate-albite-pyrite stockwork breccia and replacement system. The main orebody is concordant with the upper contact of a west dipping tholeiitic flow and variably altered and schistose basaltic komatiite of the Malartic Group and is associated with an intermediate to felsic dyke complex of albitite and postore granodiorite and feldspar porphyry.
Gold mineralisation occurs mainly within several (not all) albitite dykes, with lesser amounts on the dyke margins and in the intervening iron tholeiite and basaltic komatiite. The albitite is present as narrow discontinuous, 0.3 to 10 m, and up to 50 m wide dykes of light to medium grey colour, with bluish chilled margins, a sugary aplitic texture and fine carbonate-quartz-albite stringer to stockwork veinlets with disseminated pyrite ± pyrrhotite and gold. Individual dykes are 25 to 100 m in length and are localised in the altered basaltic komatiite to the west and in the iron tholeiite to the east.
Kiena was estimated to have contained (production + reserves) 48 tonnes of gold in 1995.
For more detail see the reference(s) listed below.
The most recent source geological information used to prepare this decription was dated: 1995.
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.
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Morasse S, Wasteneys H A, Cormier M, Helmstaedt H, Mason R 1995 - A pre-2686 Ma intrusion-related Gold deposit at the Kiena Mine, Val D Or, Quebec, southern Abitibi subprovince: in Econ. Geol. v90 pp 1310-1321
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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, its employees and servants: i). do not warrant, or make any representation regarding the use, or results of the use of the information contained herein as to its correctness, accuracy, currency, or otherwise; and ii). expressly disclaim all liability or responsibility to any person using the information or conclusions contained herein.
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