Nonacho Bedrock Mapping Project: Overview of the 2019-2020 Thematic Research in Sedimentology, Stratigraphy, and Provenance Analysis

Presenter:

 

Jade H. Lockie – jlockie@laurentian.ca

 
 

Authors:

 
J.H. Lockie – Laurentian University, Sudbury, ON, Canada
A. Ielpi – Laurentian University, Sudbury, ON, Canada
E. Martel – Northwest Territories Geological Survey, Yellowknife, NT, Canada
B. Fischer – Northwest Territories Geological Survey, Yellowknife, NT, Canada
S. Pehrsson – Geological Survey of Canada, Ottawa, ON, Canada
J.H.F.L. Davies – Université du Québec à Montréal, Montréal, QC, Canada
 

Summary:

 

The Paleoproterozoic Nonacho Basin remains an enigmatic sedimentary unit in the south-western portion of the Rae craton, particularly when considering the geodynamic setting, age, provenance, and correlation with broadly coeval (meta-) sedimentary assemblages elsewhere in the craton. We present an update for the years 2019-2020 on thematic research in sedimentology, stratigraphy, and analysis of detrital provenance for the basin. Specifically, we provide: (i) an improved sedimentological and stratigraphic framework for the Nonacho Basin, including the recently recognized record of shallow-marine deposition therein; (ii) updated hypotheses regarding its correlation to other supracrustal rocks of similar vintage in the Rae Craton; and (iii) a work plan for ongoing analyses of U-Pb geochronology and Hf isotope systematics on detrital zircon recovered from the strata of the basin.

 
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