|Title||Stratigraphy of the Seymour Inlet-Belize Inlet complex and Draney Inlet, British Columbia: results from piston cores 2007007PGCSTN007 and 2009003PGCSTN007, and freeze core 2007007PGCSTN006|
|Licence||Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences.|
|Author||Dallimore, A; Enkin, R J; Cooke, K A; Hay, M B|
|Source||Geological Survey of Canada, Open File 6747, 2019, 142 pages (1 sheet), https://doi.org/10.4095/313614 Open Access|
|Publisher||Natural Resources Canada|
|File format||pdf; rtf|
|NTS||92M/02; 92M/03; 92M/04; 92M/05; 92M/06|
|Area||Seymour Inlet; Belize Inlet; Draney Inlet; Frederick Sound|
|Lat/Long WENS||-128.0000 -126.5000 51.5000 51.0000|
|Subjects||marine geology; surficial geology/geomorphology; stratigraphy; geophysics; marine sediments; silts; sands; muds; core samples; paleoenvironment; stratigraphic analyses; geophysical logging; magnetic
susceptibility; geophysical interpretations; seismic interpretations; acoustic surveys, marine; seismic surveys, marine; seismic refraction surveys; bathymetry; sedimentary structures; laminations|
|Illustrations||photographs; location maps; geoscientific sketch maps; seismic profiles; geophysical logs; tables; lithologic sections; profiles|
|Program||Public Safety Geoscience Public Safety Geoscience - Coordination|
|Released||2019 02 18|
The Seymour Belize Inlet complex (Figure 1) and Draney Inlet, British Columbia, are coastal inlets in the mainland central coast of British Columbia. Both inlets host anoxic bottom
waters which are often the environments where laminated sediments are preserved undisturbed. These laminated sediment columns are rare, unique and valuable recorders of environmental change, which can be dated on an annual scale, yielding high
temporal resolution paleoenvironmental records. Many of B.C.'s inlets have been studied over the years (Dallimore and Jmieff, 2010, and Figure 2), but only a very few contain laminated sediments. These include Saanich Inlet (See Marine Geology
Special Issue No. 174), Effingham Inlet (e.g., Hay et al., 2009; Dallimore et al., 2005; Chang et al. 2003) and Frederick Sound in the Seymour-Belize Inlet complex (Table 1). Quantitative techniques from that earlier work, based on the measurement of
physical properties of the sediments, are now well developed for accurately interpreting high-resolution environmental history in these environments (e.g., Dallimore et al., 2008; Ivanochko et al. 2008a and b).
To extend paleo-environmental
interpretations regionally, the central B.C. Seymour-Belize Inlet complex (Figure 3) has been investigated during a series of nine collaborative oceanographic research cruises (Table 2) mounted from the Institute of Ocean Sciences in Sidney, B.C..
This work has been variously funded over the years by Natural Resources Canada-Geological Survey of Canada-Pacific; Fisheries and Oceans Canada- Ocean Sciences and Productivity; the Canadian Hydrographic Service and Natural Sciences and Engineering
Research Council of Canada, Discovery Grant and Ship Time grants programs.
This Open File presents a very detailed stratigraphy (Figure 4) and magnetic susceptibility physical property measurements from a freeze core and a 15 m piston core taken
from Frederick Sound in the Seymour-Belize Inlet Complex in 2007, and for a 14.7 m piston core from Draney Inlet taken in 2009 (Figure 5). These detailed data, on a centimetre scale over the length of the cores, form the data archive for work on this
core to be published in the literature post 2011.
|Summary||(Plain Language Summary, not published)|
Ocean floor sediments sampled from fjord basins along Canada's Pacific coast are particularly useful for recording climate variations and the ages of
earthquakes over the last 10000 years. This Open File provides a raw data dump and preliminary interpretation of sediment cores collected from two fjords from the central coast of British Columbia.