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TitleAbrasion of kimberlite pebbles in a tumbling mill: implications for diamond exploration
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AuthorCummings, D I; Kjarsgaard, B A; Russell, H A J; Sharpe, D R
SourceGeological Survey of Canada, Current Research (Online) no. 2011-7, 2011, 12 pages, https://doi.org/10.4095/288022
Year2011
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediaon-line; digital
File formatpdf (Adobe Acrobat Reader)
Subjectseconomic geology; kimberlites; diamond; lithology; pebble lithology; sediment transport; transportation; dispersal patterns; sediment dispersal; abrasion; Cenozoic; Quaternary
Illustrationsgraphs; photographs; cross-sections; tables
ProgramDiamonds, GEM: Geo-mapping for Energy and Minerals
Released2011 06 07
AbstractTumbling mill experiments were performed to quantify the rate at which pebble-sized kimberlite cubes abrade (lose mass) during transport relative to basalt, gabbro, tonalite, and sandstone clasts from the Canadian Shield. The kimberlite pebbles lost mass 3 to 3500 times faster than Canadian Shield pebbles. One massive volcaniclastic kimberlite cube disaggregated completely into sand- and mud-sized particles after only several hours of soaking before the experiments started. These results suggest that some kimberlite lithologies will break down rapidly to sand- and mud-sized particles upon entrainment, and that other kimberlite lithologies, while losing mass more slowly, may still abrade up to an order of magnitude faster than common shield lithologies as they are dispersed across the landscape.
GEOSCAN ID288022