| Title | Broadband waterborne hammer seismic source for imaging river and lake sub-bottoms |
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| Author | Pugin, A J -M; Brewer, K; Brooks, G R |
| Source | SEG19 SEG International Exposition and 89th Annual Meeting; Society of Exploration Geophysicists, Technical Program, Expanded Abstracts 2019, 2019 p. 2750-2754, https://doi.org/10.1190/segam2019-3202612.1 |
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| Year | 2019 |
| Alt Series | Natural Resources Canada, Contribution Series 20180434 |
| Publisher | Society of Exploration Geophysicists |
| Meeting | SEG19 - SEG International Exposition and 89th Annual Meeting; San Antonio, TX; US; September 15-20, 2019 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Ontario; Quebec |
| Area | Round Lake; Ottawa River |
| Subjects | geophysics; surficial geology/geomorphology; sedimentology; stratigraphy; Science and Technology; Nature and Environment; mapping techniques; geophysical surveys; seismic surveys; in-field
instrumentation; glacial deposits; tills; sands; gravels; landslide deposits; mass wasting; buried valleys; depositional history; sedimentation; floods; erosional surfaces; sedimentary structures; faults; alluvial sediments; lacustrine sediments;
colluvial and mass-wasting deposits; Data processing; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | photographs; seismic profiles; spectra |
| Program | Public Safety Geoscience Eastern Canada Geohazards Assessment Project |
| Released | 2019 08 10 |
| Abstract | (Summary)
Waterborne surveys were conducted using a handheld hammer hitting a rod attached to an aluminum plate with a single channel hydrophone eel. The broadband signal generated by this
recording system produces a data set that can be processed in multiple frequency bands such at 0.5 kHz, 1.5 kHz, 3.5 kHz and 5.5 kHz. The lowest frequency band shows a greater capacity of penetration with reflections observed below high impedance
contrasts such as till and sand-gravel layers. The higher frequency bands show the lacustrine sediment layers with greater penetration than that acquired with a 15 kHz CHIRP acoustic profiler system. A survey across Round Lake, Ontario, revealed
faulted structures that are interpreted preliminarily to be mass movement-related. A second survey across the Ottawa River, Ontario-Quebec, reveals a buried gorge and a complex sedimentation interpreted as flood-related erosion and
deposition. |
| Summary | (Plain Language Summary, not published)
Waterborne surveys were conducted using a carpenter hammer hitting a rod attached to an aluminum plate with a single channel hydrophone eel. The
broadband signal generated by this recording system produces a data set that can be processed in multiple frequency bands such at 0.5 kHz, 1.5 kHz, 3.5 kHz and 5.5 kHz. The lowest frequency band shows a greater capacity of penetration with
reflections observed below high impedance contrasts such as till and sand-gravel layers. The higher frequency bands show the lacustrine sediment layers with greater penetration than that acquired with a 15 kHz CHIRP acoustic profiler system. A survey
across Round Lake, Ontario, revealed faulted structures that are interpreted preliminarily to be mass movement-related. A second survey across the Ottawa River, Ontario-Quebec, reveals a buried gorge and a complex sedimentation interpreted as
flood-related erosion and deposition. |
| GEOSCAN ID | 314530 |
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