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TitleDownhole logging measurements in the Fraser Delta, British Columbia
DownloadDownload (whole publication)
AuthorMwenifumbo, C J; Killeen, P G; Elliott, B
SourceGeological Survey of Canada, Current Research no. 1994-E, 1994 p. 77-84, https://doi.org/10.4095/194100
Year1994
PublisherNatural Resources Canada
Documentserial
Lang.English; French
Mediapaper
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (1994). Current research 1994-E, Geological Survey of Canada, Current Research no. 1994-E
ProvinceBritish Columbia
NTS92G/03
AreaFraser River Delta; Vancouver
Lat/Long WENS-123.5000 -123.0000 49.2500 49.0000
Subjectsgeophysics; geophysical logging; gamma-ray surveys; gamma ray logging; magnetic susceptibility; temperature; geophysical surveys; density; depositional environment; sands; silts; clays; drillholes; Quaternary
Illustrationssketch maps; analyses
Released1994 07 01
AbstractDownhole geophysical logging measurements have been made on the Fraser River Delta to construct a more precise lithostratigraphy of the area. The parameters measured include gamma ray, density, magnetic susceptibility, and temperature. Lithological identifications were made through the use of gamma-ray logs. Sands, silts, and clayey silts are characterized by very low, medium, and high radioactivity, respectively. Most of the sediments show a progressive consolidation with depth due to compaction, which can be easily determined from the geophysical logging data. Because of the good correlation between texture and natural radioactivity, the gamma ray logs were used to determine the depositional environments of the drilled sediments. Gamma ray data correlate well with geotechnical data obtained with a cone penetrometer. Cohesive, clayey/silty soils are associated with increased radioactivity. The natural gamma-ray data may, therefore, be used to characterize soil types in the Fraser River Delta.
GEOSCAN ID194100