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Location: 76 km SE from Kenora, Ontario, Canada
Suite 2070 - 1188 West Georgia StreetVancouverOntario, CanadaV6E 4A2
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The Cameron and Dubenski Gold Deposits form part of the clan of gold mineral systems occurring in greenstones that have traditionally been classified as orogenic, whereby a clan is a family of deposits that are either formed by related processes or that are distinct products of large-scale hydrothermal processes (Robert et al. 2007). Greenstone hosted gold deposits are the most important of the clan with some nineteen deposits with greater than 10 Moz contained gold identified and with almost 400 Moz of total endowment worldwide.The bulk of the mineralization comprising the Cameron Gold Deposit can be regarded as being part of the atypical greenstone family, with a lesser, but potentially-highly significant orogenic vein style. The Cameron Gold Deposit has many features in common with both orogenic and atypical greenstone deposits. These include an association of the intersection of a crustal scale (first-order) structure (Cameron Pipestone Fault) with a large-scale (second order) structure (Cameron Lake Shear Zone) in the region of an anticline fold structure (Shingwak Lake Anticline). A stratigraphic position at a possible hiatus or change in volcanism (Rowan Lake Volcanics to Cameron Lake Volcanics) in an iron-rich part of the volcanic stratigraphy, which is also near a volcanic sediment (volcaniclastic) transition. The bulk of the mineralization comprising the Dubenski Gold Deposit can be regarded as being part of the atypical greenstone family, with the mineralization style being dominated by disseminated sulphide replacement. It is apparent that the mineralization at the Dubenski Gold Deposit is silica-rich, but quartz-poor, and that the alteration assemblage is dominated by silicacarbonate-pyrite which are other characteristics of deposits of the atypical classification. The mineralization at the Cameron Gold Deposit is mainly hosted in mafic volcanic rocks within a northwest-trending shear zone (Cameron Lake Shear Zone or CLSZ) which dips fairly steeply to the northeast. In the southeastern part of the deposit where the greatest amount of gold has been delineated, the shear zone forms the contact between the mafic volcanic rocks and diabase / dolerite in the footwall. The mineralization occurs within quartz breccia veins, associated with intense silica sericitecarbonate-pyrite alteration in a series of zones that dip moderately to steeply to the northwest within and adjacent to the shear zone. Gold is associated with disseminated pyrite with high sulphide concentration generally corresponding with higher grade. Visible gold is very rare. The mineralization is open at depth and along strike to the northwest, so potential exists to expand the mineral resource at this deposit.The mineralization at the Dubenski Gold Deposit is hosted by felsic to intermediate ‘tuff’ and lapilli tuff or sericite schist. Gold is associated with disseminated pyrite, with higher-grade zones corresponding with strong silicification. Although gold is strongly associated with pyrite and silica, not all pyrite carries gold and not all silicified zones are auriferous. Visible gold is common throughout the deposit and occurs along foliation planes and, less commonly, as disseminations.The Cameron and Dubenski Gold Deposits are greenstone-hosted gold deposits and whilst they can generally be considered to be a part of the orogenic family of gold deposits, they bear many atypical characteristics that are commonly identified in the largest gold deposits of this style.
