Regional seismic signature of the basement and crust beneath the McArthur river mine district, Athabasca basin, Saskatchewan

Z. Hajnal, E. Takács, D. J. White, I. Györfi, B. Powell, R. Koch

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Seismic-reflection profile results of the EXTECH IV project reveal exceptionally high-quality images from surface to Moho depth. First-break analysis defined the spatial velocity field, outlined geochemical alteration in the Athabasca Group, delineated much of the basal unconformity, and indicated the location of fault zones postdating the Athabasca Group. Variations in depth and changes in structural setting of the Athabasca Basin-basement unconformity are imaged seismically. Seismic-reflection images reveal structural configurations and stratigraphic properties of the P2 fault zone and the associated basement rocks to a depth of about 7000 m and along a lateral profile of 10 km. A bright band of reflectivity at about 8000 m depth, is attributed to 1270 Ma Mackenzie sills. Seismic-reflection signatures outline remnants of a major crustal reactivated shear zone with associated retrograde metamorphismin the middle to lower crustal depths. A relatively shallow (~35 km) Moho appears to be young, tectonically generated, and with well defined structural disturbances.

Original languageEnglish
Pages (from-to)389-396
Number of pages8
JournalBulletin of the Geological Survey of Canada
Issue number588
Publication statusPublished - 2007

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crust
seismic reflection
basin
river
Moho
unconformity
fault zone
basement rock
sill
reflectivity
shear zone
disturbance

ASJC Scopus subject areas

  • Geology

Cite this

Regional seismic signature of the basement and crust beneath the McArthur river mine district, Athabasca basin, Saskatchewan. / Hajnal, Z.; Takács, E.; White, D. J.; Györfi, I.; Powell, B.; Koch, R.

In: Bulletin of the Geological Survey of Canada, No. 588, 2007, p. 389-396.

Research output: Contribution to journalArticle

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