T101 From Outcrops to the Base of the Crust: Integrated Geophysical and Geological Illumination of Earth’s Tectonic Fabrics to Refine Understanding of Crustal Evolution and Natural Resources (Posters)

Monday, 10 October 2022
9:00 AM - 1:00 PM
Exhibit Hall F

USING ARCGIS PRO AND HIGH-RESOLUTION IMAGERY TO MAP THE SURFACE EXPRESSIONS OF PRECAMBRIAN FAULTS/LINEAMENTS THROUGH NORTHERN CANADA BY FOLLOWING STRUCTURALLY CONTROLLED STREAMS AND LAKES

Paper number: T101-9
Program: Technical Sessions
Time: 9:00 AM – 1:00 PM

Authors

Abstract

The Wopmay and Calderian orogens in northern Canada, as well as the Great Slave Lake shear zone, Taltson magmatic zone, and the Striding- Athabasca mylonite triangle all contain complex networks of faults dating back well over 2 billion years. These faults record a long history of arc-continent collisions, volcanism, orogens and transform faulting. Using high-resolution imagery from ArcGIS Pro, some of these faults can be seen from the air through offset beds, glacial valleys, and structurally controlled rivers, lakes and lineaments. In some areas, the faults can be clearly traced for hundreds of miles, and even seen from space- such as in the linear shorelines of the Great Slave Lake. Mapping them in detail has been done but little mention is given as to their surface expressions and structural control. Using ArcGIS Pro, they can be traced and more unknown faults with similar orientations can be found. This can help unravel the complex geology of this region. The clear correlation between the faults and linear features in places like the Great Slave Lake and the Athabasca mylonite triangle show a clear structural control of the shorelines, lakes and streams with the faults.

Geological Society of America Abstracts with Programs. Vol. 54, No. 6

doi: 10.1130/abs/2022AM-383779

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