| Title | Mapping the Nechako Basin using earthquake waves |
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| Author | Cassidy, J F ;
Kim, H; Dosso, S E |
| Source | 2008.  Open Access |
| Links | Online - En
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| Year | 2008 |
| Alt Series | Earth Sciences Sector, Contribution Series 20070538 |
| Meeting | Invited presentation at: Interior Basins Workshop; Calgary, AB; CA; February 19, 2008 |
| Document | computer file |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | British Columbia |
| NTS | 92N; 92O; 93B; 93C; 93F; 93G |
| Lat/Long WENS | -126.0000 -122.0000 54.0000 51.0000 |
| Subjects | sedimentology; geophysics; basins; sedimentary basins; basin analysis; basin geometry; geophysical interpretations; seismic interpretations; seismic velocities; Nechacko Basin |
| Illustrations | location maps; graphs; plots |
| Program | Mountain Pine Beetle |
| Abstract | During the last decade, unusual hot, dry summers and mild winters in central British Columbia led to an abundance of mountain pine beetles, which have destroyed millions of lodgepole pine (the
province’s most commercially harvested tree). This is having a significant and negative impact on the people and communities who make a living by forestry in central British Columbia. Minerals or energy extraction may provide alternate economic
opportunities for the region. To assist in this, we are undertaking a passive source seismic mapping to help assess the hydrocarbon and mineral potential of the Nechako Basin area in central BC. The Nechako Basin has been the focus of limited
hydrocarbon exploration since the 1930's. Twelve exploratory wells were drilled and oil stains on drill chip samples and the presence of gas in drill stem tests attests to the presence of a hydrocarbon system. Seismic data collected in the 1980's
were of generally poor quality with little energy penetrating the volcanic cover. In this study, we will utilise recordings of distant earthquakes to map the sediment thickness, crustal thickness, and overall geometry of the Nechako Basin. An array
of seven seismic stations was deployed in September, 2006 to sample much of the basin. The results of this study will complement independent active source seismic studies that are planned for the region, by providing images using waves coming "from
below," and by providing constraints on the shear wave velocity. The results of this research will also complement MT studies that are currently underway, providing critical new information on porosity, fractures, and fluids. We present preliminary
results of this research. |
| GEOSCAN ID | 224795 |
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