Rock Physical Property Measurements for Modeling Geophysical Datasets (NTS 92N, 92O, 93B, 93C)
- Kelly Russell, UBC

Nechako Basin and Interior Plateau Project Area Miocene and younger basalts (e.g., Chilcotin) as well as Eocene and Jurassic to Cretaceous age volcanic and sedimentary rocks (e.g., Endako Group, Ootsa Lake Group, Taylor Creek Group) underlie significant portions of the Interior Plateau and Nechako Basin of central British Columbia.

There is potential for unexploited hydrocarbon and base metal resources underlying these younger volcanic and sedimentary successions and hence this area is of economic interest. Geophysical surveys (both seismic reflection and magnetotellurics), funded by GeoscienceBC and the Geological Survey of Canada, have concentrated on:

  1. portions of the Nechako Basin for hydrocarbon potential within mostly Jurassic and Cretaceous sedimentary rocks (Ferri & Riddell; 2006; Riddell, 2006, Riddell et. al 2007), and
  2. portions of the Interior Plateau to facilitate exploration for base metals.
To help interpret variations in geophysical signals, we have measured the geophysical properties (density, porosity, magnetic susceptibility and seismic velocity) for 50 samples of the Miocene Chilcotin Group. We are expanding our ongoing experimental studies by directly measuring the geophysical properties (e.g., magnetic properties, density, porosity, electrical conductivity, and VP & VS) of key lithologies within the Nechako Basin.

This project is directly relevant to the Geoscience BC mandate because our proposed dataset would aid in processing of raw seismic and magnetotelluric data and result in more accurate geophysical images (seismograms) of the subsurface and delineation of exploration targets.

Technical Articles
2012: "Rock physical-property measurements for the Nechako Basin oil and gas region, central British Columbia"
- Summary of Activities 2011, Report 2012-1 p. 125-150 (pdf, 6.8 MB)

Final Deliverables
Geoscience BC Report 2011-10
Rock Physical Property Measurements to Aid Geophysical Surveys in the Nechako Basin Oil and Gas Region, central British Columbia
by G. Andrews, S. Quane, R.J. Enkin, K. Russell, A. Kushnir, L. Kennedy, N. Hayward and M. Heap

Miocene and younger basalts (e.g., Chilcotin Group) and Eocene to Jurassic age volcanic and sedimentary rocks (e.g., Endako Group, Ootsa Lake Group, Taylor Creek Group) underlie significant portions of the Interior Plateau and Nechako Basin of central British Columbia. There is potential for unexploited hydrocarbon and base metal resources underlying these younger volcanic and sedimentary successions, making this area of significant economic interest.

Geophysical surveys (both seismic reflection and magnetotellurics), funded by Geoscience BC and the Geological Survey of Canada, have concentrated on (1) portions of the Nechako Basin for hydrocarbon potential within Jurassic and Cretaceous sedimentary rocks and (2) portions of the Interior Plateau for base metal exploration. To help interpret variations in geophysical signals, we have measured the geophysical properties (density, porosity, magnetic susceptibility and remanence, electrical resistivity and chargeability, and seismic velocity) for 107 samples of the key lithologies of the Nechako Basin. This report was funded by Geoscience BC to aid in processing raw seismic and magnetotelluric data with the intention of extracting more accurate geophysical images of the subsurface and delineation of exploration targets.

 



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