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TitleA potassic phreatomagmatic volcanic centre in the Thelon Basin (Northwest Territories): implications for diamond exploration
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPeterson, T D
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1995-C, 1995 p. 19-26, Open Access logo Open Access
PublisherNatural Resources Canada
Lang.English; French
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian Shield
File formatpdf
ProvinceNorthwest Territories
Lat/Long WENS-103.0000 -92.3500 64.0000 63.5500
Subjectsigneous and metamorphic petrology; diamond; volcanic rocks; lamproites; volcanic vents; igneous rocks; analyses; whole rock analyses; geochemical analyses; Kuungmi Formation; Thelon Basin; Proterozoic
Illustrationsphotographs; photomicrographs; analyses
Released1995 01 01
AbstractAn exposure of the strongly potassic and magnesian Kuungmi Formation (less than 1.72 Ga) within the Thelon Basin has the characteristics of a phreatomagmatic volcanic centre, including vesicular sandy tuffs and phlogopite-rich accretionary lapilli. This centre demonstrates that the geological conditions which permit development of diamondiferous lamproite vents were present in the early to mid-Proterozoic, when the Thelon Formation was much more extensive.

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