Title Till geochemical signatures of magmatic Ni-Cu deposits and regional till geochemistry, Thompson nickel belt, Manitoba
Author McClenaghan, M.B.; Matile, G.L.D.; Layton-Matthews, D.; Pyne, M.
Source Open-File Report - Geological Survey of Canada, No.6005, 121p. 1 disc. Publisher: Geological Survey of Canada, Calgary, AB, Canada
Publication Date 2009
Notes In English. Accessed on Aug. 12, 2011. 50 refs. GeoRef Acc. No: 309753
Index Terms geochemistry; glacial geology; glacier flow; sediments; striations; Canada--Manitoba- -Thompson nickel belt; Canada; clastic sediments; copper ores; geochemical methods; glacial features; ice movement; igneous rocks; magmatism; Manitoba; metal ores; mineral exploration; nickel ores; northern Manitoba; Thompson nickel belt; till; Western Canada
Abstract The Geological Survey of Canada conducted a till compositional study around the komatiite-associated Ni-Cu deposits in the northern Thompson Nickel Belt, northern Manitoba, to document the multi-element geochemical signature of the deposits in the 0.063 mm fraction of till. Samples used in this study include archived material collected in 1996 and samples collected in 2005 and 2006. The Laurentide Ice Sheet flowed across the Thompson Nickel Belt southwestward and subsequently westward, and striations from both ice-flow events are readily apparent on outcrops along the Belt. Exploration along the Thompson Nickel Belt and in the surrounding terranes should consider both the older southwest and younger westward ice-flow events when interpreting and following up till geochemical results. Till geochemistry of the 0.063 mm fraction is a useful tool for Ni exploration in the region. Pathfinder elements identified in this study for the 0.063 mm till fraction include Ni, Cu, Pd, Pt, Co, As, Cd, Ag, Sb, Bi, Se, S, and Te. This multi-element signature is similar to those identified in till for other Ni-Cu-PGE deposits. Pd:Pt ratio 3 offers further discrimination of significant till geochemical anomalies. Six anomalous till samples from remote locations outside the Ni Belt contain significantly elevated concentrations of, in various combinations, Pt, Pd, Cu, Cr, Mo, Sb, Bi, and Fe, as well as Au. These anomalies warrant further investigation.
URL http://geopub.nrcan.gc.ca/moreinfo_e.php?id=247412
Publication Type monograph
Record ID 65006359