Publication information

Geological Survey of Canada
Open File 8565

Detrital U-Pb zircon and 40Ar/39Ar muscovite geochronology of the Whitehorse Trough, and surrounding rocks, Yukon and British Columbia

D.A. Kellett and P. Iraheta Muniz 

© Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resources, 2019

Permanent link: https://doi.org/10.4095/314694

Publications in this series have not been edited; they are released as submitted by the author.

Recommended citation

Kellett, D.A., and Iraheta Muniz, P., 2019. Detrital U-Pb zircon and 40Ar/39Ar muscovite geochronology of the Whitehorse Trough, and surrounding rocks, Yukon and British Columbia; Geological Survey of Canada, Open File 8565, 35 p. https://doi.org/10.4095/314694

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Contents

This multicomponent Open File presents detrital zircon U-Pb (11 samples) and detrital muscovite 40Ar/39Ar (2 samples) results for sedimentary rocks sampled from select units of the Lewes River Group/Stuhini Group, Laberge Group, Bowser Lake Group and Tantalus Formation in southern Yukon and northern British Columbia, as well as one quartzofeldspathic schist sample from the Florence Range metamorphic rocks associated with the Yukon Tanana terrane. Sample locations are shown in Figure 1. This analytical work was conducted as part of the Yukon Tectonic Evolution activity of the GEM (Geomapping for Energy and Minerals) program of the Geological Survey of Canada (see Kellett et al., 2017; Kellett et al., 2018 for details). 
Interpretations of the U-Pb and 40Ar/39Ar results for individual rock samples are given below in the Results section of this report. Representative transmitted light and back-scattered electron (BSE)/ cathodoluminescence (CL) zircon images are shown for each sample, and U-Pb detrital zircon results are illustrated by Concordia and combined histogram/probability density diagrams. 40Ar/39Ar detrital muscovite results are presented in kernel density estimate plots (Vermeesch, 2012; 2018). The results and age interpretations for all samples presented are summarized in Table 1 (separate file). The full U-Pb and 40Ar/39Ar datasets are provided as separate Microsoft Excel files in Appendices 1 and 2, respectively. Plots of the full step heat 40Ar/39Ar spectra for each single crystal step heat experiment are collated into an Adobe PDF file (Appendix 3). Adobe PDF files for each detrital zircon sample containing BSE and CL images for all mounted zircon grains are also presented in Appendix 4. Grains are numbered and correspond to analysis spot names; the locations of SHRIMP (sensitive high resolution ion microprobe) analytical spots are depicted by ellipses. 

Directory structure

of_8565.pdf
of_8565_Table 1 Result and age interpretation summary.xlsx
of_8565_Appendix A Detrital zircon U-Pb results.xlsx
of_8565_Appendix B Detrital muscovite ArAr results.xlsx
of_8565_Appendix C ArAr step heat plots.pdf
of_8565_Appendix D Detrital zircon BSE and CL images (File folder containing 11 pdf files: IP582-10138.pdf, IP641-10679.pdf, IP641-10680.pdf, IP798-11630.pdf, IP798-11631.pdf, IP798-11632.pdf, IP798-11633.pdf, IP798-11634.pdf, IP922-12357.pdf, IP922-12358.pdf, and IP922-12359.pdf)

Author contact information

D.A. Kellett 
(dawn.kellett@canada.ca)
Geological Survey of Canada
1 Challenger Drive
Dartmouth, Nova Scotia
B2Y 4A2

P. Iraheta Muniz 
(pamela.irahetamuniz@canada.ca)
Geological Survey of Canada
601 Booth Street
Ottawa, Ontario
K1A 0E8

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