GEOSCAN Search Results: Fastlink


TitleInterim results of the EXTECH-IV seismic-reflection program in the Athabasca Basin, northern Saskatchewan
AuthorWhite, D J; Hajnal, Z; Gyorfi, I; Takacs, E; Roberts, B; Mueller, C; Reilkoff, B; Koch, R; Powell, B; Annesley, I; Bernier, S; Jefferson, C
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C8, 2003, 11 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
NTS64E; 64L; 64M; 74F; 74G; 74H; 74I; 74J; 74K; 74N; 74O; 74P
Areanorthern Saskatchewan
Lat/Long WENS-110.0000 -102.0000 60.0000 57.0000
Subjectsregional geology; structural geology; geophysics; reflection studies; seismic reflection surveys; seismic surveys; geophysical surveys; bedrock geology; sandstones; sedimentary rocks; structural features; faults; crustal studies; crustal structure; mineral deposits; modelling; Athabasca Basin; Athabasca Group
Illustrationssketch maps; seismic profiles; tables
Released2003 03 14
AbstractInterim results from the EXTECH-IV 2000 seismic-reflection program at the McArthur River mine site include interpretations of the two-dimensional high-resolution and regional profiles, simulated seismic responses for the P2 orebody, and preliminary images from the pseudo three-dimensional survey. Interpreted seismic-reflection data 1) accurately image the sandstone-basement unconformity at a depth of approximately 400 to 600 m; 2) map its offset by the P2 reverse fault; and 3) trace the extension of the 2.5km thick P2 fault system upward through the overlying Athabasca Group sandstone and downward more than 4 km as a listric structure that curves past the southeastern limit of the survey. Lateral variations in sandstone porosity, silicification, or facies changes are inferred from variable reflection response and velocity variations, and angular discordances in stratigraphy suggest onlaps or unconformities that may have resulted from tectonic control on sedimentation. A reflection response from the vicinity of the orebody is apparent. The entire survey and a LITHOPROBE survey to the east are underlain by a bright reflector interpreted as an extensive thick sill, at a depth of approximately 6 km, that may be associated with the Mackenzie Igneous Event (1.265 Ga).