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TitleStudy of sedimentary rock xenoliths from kimberlites on Hall Peninsula, Baffin Island, Nunavut
AuthorZhang, S; Pell, J
SourceCanada-Nunavut Geoscience Office, Summary of Activities 2012, 2013 p. 107-112
Year2013
Alt SeriesEarth Sciences Sector, Contribution Series 20120335
PublisherCanada-Nunavut Geoscience Office
Documentserial
Lang.English
Mediapaper
File formatpdf
ProvinceNunavut
NTS25O/13; 25O/14; 25O/15; 25O/16; 25P/13; 25P/14; 26A/04; 26B
AreaBaffin Island; Hall Peninsula
Lat/Long WENS -68.5000 -65.0000 65.0000 63.5000
Subjectssedimentology; economic geology; sedimentary rocks; shales; dolostones; breccias; xenoliths; kimberlites; diamond; mineral potential; overburden thickness; Conodonts; Chidliak kimberlite province; Paleozoic
Illustrationslocation maps; photomicrographs
ProgramCanada-Nunavut Geoscience Office, Funding Program
LinksOnline-Enligne
AbstractThis study is part of the Canada-Nunavut Geoscience Office's Hall Peninsula Integrated Geoscience Program, a multiyear bedrock and surficial geology mapping program with associated thematic studies. Hall Peninsula, located on southeastern Baffin Island, Nunavut, hosts the newly discovered Chidliak kimberlite province. Presently, this area lacks Phanerozoic sedimentary cover; however, Late Ordovician and Early Silurian microfossils (conodonts) have been recovered from carbonate xenoliths preserved in the Upper Jurassic-Lower Cretaceous kimberlites. The well-preserved conodont faunas provide reliable evidence for estimating 1) the thickness of Lower Paleozoic sedimentary cover prior to the intrusion of the kimberlites; and 2) the variations in temperature recorded by conodonts preserved in sedimentary rock xenoliths within the same kimberlite, and among the different kimberlites.
The project activities include 1) collecting sedimentary rock xenoliths from the drillholes intersecting kimberlites in the Chidliak-Qilaq area; 2) processing the carbonate xenoliths for conodonts; 3) estimating the total thickness of Lower Paleozoic sedimentary cover and the degree to which the xenoliths were heated by the kimberlites, using the conodonts' age and colours; and 4) obtaining information about the Paleozoic petroleum system in the nearby Baffin Bay area by studying sedimentary rock types and collecting Rock-Eval 6 data.
GEOSCAN ID292118