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Seismic imaging of shallow reflectors in the Eastern Kapuskasing Structural Zone, with correction of crossdip attitudes
Author(s) -
Kim Jisoo,
Moon Wooil M.,
Percival John A.,
West F. Gordon
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl01983
Subject(s) - geology , statics , seismology , thrust fault , crust , transect , residual , archean , fault (geology) , geophysics , geochemistry , oceanography , physics , classical mechanics , algorithm , computer science
Cascaded processes of crossdip correction and residual statics are tested and applied in the reprocessing of regional data from LITHOPROBE Kapuskasing Transect line 2. The objective was to improve seismic imaging of shallow, gently dipping reflectors in the eastern Kapuskasing structural zone (KSZ), a thrusted slice of Archean middle to lower crust. This focusing strategy proved to be very effective in improving the image of the reflected energy and in identifying a set of conformally dipping reflectors whose true crossdip is estimated to be approximately 17° NW. The estimated crossdips for a reflective, compositionally layered zone and for the basal thrust, the Ivanhoe Lake Fault zone (ILFZ), support the previously estimated average dip of 15°–20°.