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TitleMineralogy and geochemistry of the C14 kimberlite and associated glacial sediments, Kirkland Lake, Ontario
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AuthorMcClenaghan, M B; Kjarsgaard, I M; Stirling, J A R; Pringle, G; Kjarsgaard, B A; Berger, B
SourceGeological Survey of Canada, Open File 3719, 1999, 147 pages; 1 diskette/disquette, https://doi.org/10.4095/210237
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Year1999
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediapaper; diskette; digital; on-line
RelatedThis publication is related to McClenaghan, M B; Gauvreau, D; Kjarsgaard, B A; (2009). Mineral chemistry database for kimberlite, surficial sediments and kimberlite boulders from the Lake Timiskaming and Kirkland Lake kimberlite fields, Ontario and Quebec, Geological Survey of Canada, Open File 5833
File formatreadme
File formatpdf (Adobe® Reader®); rtf; csv; xls (Microsoft® Excel® 3.0); doc (Microsoft® Word® 6.0); txt (ASCII)
ProvinceOntario
NTS32D/05
AreaKirkland Lake
Lat/Long WENS -79.8208 -79.7792 48.2958 48.2708
Subjectsgeochemistry; surficial geology/geomorphology; kimberlites; mineralogical analyses; analyses; geochemical analyses; tills; glacial deposits; garnet; pebble lithology; gold; andradite; diopside; ilmenite; chromite; Archean; scanning electron microscope analyses; major element analyses; trace element analyses; geochemical analyses; breccias; C14 pipe; indicator minerals; inductively coupled plasma emission spectrometry; Quaternary
Illustrationslocation maps; geoscientific sketch maps; models; photographs; schematic cross-sections; profiles; tables; flow diagrams; graphs; plots; lithologic sections
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Location
Note
Ontario Geological Survey, John B. Gammon Geoscience Library, Sudbury
Report and digital data
Ontario Geological Survey
Report and digital data
Report and digital data
Natural Resources Canada Library - Ottawa (Earth Sciences)
Report and digital data
Natural Resources Canada library - Calgary (Earth Sciences)
Report and digital data
Natural Resources Canada library - Vancouver (Earth Sciences)
Report and digital data
Geological Survey of Canada (Atlantic)
Report and digital data
ProgramCanada-Ontario Subsidiary Agreement on Northern Ontario Development, 1991-1995
Released1999 03 01; 2008 01 15; 2018 06 19
AbstractThe Geological Survey of Canada investigated four kimberlite pipes in the Kirkland Lake area, northeastern Ontario to document indicator signatures in glacial sediments. This report focuses on results from the C14 kimberlite in Clifford Township. The kimberlite has been eroded down by preglacial and glacial weathering to a level approximately 20 to 30 m below the surrounding bedrock. The subcropping surface consists of heterolithic tuffisitic kimberlite breccia. Kimberlite indicator minerals of the C14 pipe are dominated by Cr pyrope and chromite (± Cr-diopside) derived from lherzolitic xenoliths with only a minor proportion from harzburgite and dunite sources. No evidence of eclogitic xenoliths in the C14 kimberlite were found in this study. The low numbers of Cr-poor pyrope, diopside and Mg-ilmenite point to a low contribution from the Cr-poor megacryst suite which can be dominant in other kimberlites in the Kirkland Lake kimberlite field. The presence of subcalcic garnet and Cr-rich and (magnesio-) chromite suggests a moderate diamond potential for the Cl4 pipe. The relative abundance of indicator minerals in the C14 kimberlite, listed in decreasing order of abundance, is: pyrope > Cr-diopside > chromite > Mg-ilmenite. These relative abundances are mimicked in till overlying and just down-ice of the kimberlite. Indicator mineral chemistry for grains recovered from the glacial sediments around the C14 kimberlite are also similar to that for the kimberlite. Kimberlite samples from the C14 pipe contain tens of thousands of indicator mineral grains in 10-kg. Incorporation of kimberlite into the till is obvious overlying the Cl 4 kimberlite and just down-ice and is reflected in all size fractions of till. The non-ferromagnetic heavy mineral fraction (coarse to fine sand) of till contains anomalous concentrations of indicator minerals (tens to thousands of grains) and displays elevated concentrations of Cr, Sr, Ta, La, Ce, and Eu. The <0.063 mm (silt+clay) fraction has elevated concentrations of Ba, Co, Cr, Tot Fe, K, Mg, Ni, Sr and Ti and the pebble sized-fraction contains several kimberlite clasts.
GEOSCAN ID210237