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Hudson Bay Lowlands, in Northern Ontario, Canada
- The Attawapiskat kimberlite field is a field of kimberlite pipes located astride the Attawapiskat River in the Hudson Bay Lowlands, in Northern Ontario, Canada.
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Jan 1, 2013 · The Attawapiskat kimberlite field is located in the James Bay Lowlands of Northern Ontario, approximately 90 km west of the First Nation coastal community of Attawapiskat (Fig. 1). Victor Mine is one of 21 kimberlite pipes discovered within the Attawapiskat kimberlite field.
- N. Januszczak, M. H. Seller, S. Kurszlaukis, C. Murphy, J. Delgaty, S. Tappe, S. Tappe, K. Ali, J. Z...
- 2013
Victor kimberlite is located in the James Bay Lowlands approximately 90 km west of Attawapiskat (Fig. 1); it comprises two separates pipes, Victor South and Victor North (Fig. 2).
The area is composed of 18 kimberlite pipes of the Attawapiskat kimberlite field, 16 of which are diamondiferous, the Victor Mine sits on top of the Victor pipe and mines from Victor Main and Victor Southwest which have appeared close enough to the surface to be used in an open-pit mine.
The Jurassic Attawapiskat Kimberlite Field (host of the Victor Mine) and the adjacent Mesoproterozoic Kyle Lake Kimberlite Field are located in the central Superior Craton.
- Diamond Substrates in The Lithospheric Mantle
- The Ca-rich Nature of Victor Lherzolitic Garnets
- Mantle Metasomatism and The Character of The Diamond Forming Agent
- Diamond Formation in An Unusually Narrow Depth Interval
- Implications For Exploration
From inclusion mineralogy and chemical composition, the relative proportions of paragenetically distinct diamond substrates contributing to the Victor diamond population can be assessed. Based on the 75 recovered garnet inclusions, 91% of Victor diamonds derive from peridotitic substrates and 9% from eclogitic source rocks; the peridotitic garnet s...
Victor lherzolitic garnets are distinctly offset towards higher Ca contents from the division between lherzolitic and harzburgitic garnets in Cr-Ca space (Fig. 4). Variations in the Ca-content (at a given Cr content) of lherzolitic garnets may relate to two principal causes: (1) Brey (1989) experimentally constrained that the Ca content of lherzoli...
REEN patterns for Victor garnet inclusions generally show a strong degree of sinuosity that otherwise is only found in garnets from highly depleted harzburgitic sources (Fig. 5). The observed positive HREEN slopes represent a pre-metasomatic bulk rock signature (Stachel et al. 1998) that relates to the intense primary depletion event intimately ass...
Eight Victor diamonds contain inclusions (five Cr-diopsides) or inclusion pairs (three lherzolitic garnet-orthopyroxene pairs) suitable for application of geothermobarometers that are considered both precise and accurate (Nimis and Grütter 2010): (1) the single clinopyroxene geothermobarometer of Nimis and Taylor (2000) and (2) the Ca-in-orthopyrox...
Recognizing that the Victor Mine is based on a lherzolite-derived diamond resource raises the question of how to best explore for lherzolitic diamonds that appear to be particularly abundant in disturbed cratonic (Victor; also see discussion of Proterozoic formation of lherzolitic diamonds beneath the Kaapvaal Craton in Shirey et al. 2003) or peri-...
- Thomas Stachel, Anetta Banas, Sonja Aulbach, Sonja Aulbach, Karen V. Smit, Karen V. Smit, Pamela Wes...
- 2018
Jun 20, 2008 · The Attawapiskat kimberlite field in Ontario was discovered in 1988, simultaneous with those in Saskatchewan. Within this field, the ~ 170 Ma eroded, steep-sided Victor pipes (see inset in Fig. 2) are infilled with PK similar to that occurring in the Prairies kimberlites (cf. Fig. 4 a; Webb et al., 2004).
Sep 1, 2004 · The Attawapiskat kimberlite cluster is located approximately 110 km west of the community of Attawapiskat in the James Bay Lowlands of Ontario, Canada (Fig. 1). The kimberlite bodies intrude the flat-lying shallow marine rocks of the Palaeozoic Moose River basin.
