Reflection seismic imaging across a greenstone belt, Abitibi (Ontario), Canada

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Cheraghi, SaeidLaurentian Univ, Mineral Explorat Res Ctr, Harquail Sch Earth Sci, Goodman Sch Mines, Sudbury, ON, Canada. (author)

Reflection seismic imaging across a greenstone belt, Abitibi (Ontario), Canada

Article/chapterEnglish2023

Publisher, publication year, extent ...

2022-12
John Wiley & Sons,2023
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:uu-519918
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-519918URI
https://doi.org/10.1111/1365-2478.13284DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Established 2D seismic data processing methods such as Kirchhoff pre-stack time migration and Kirchhoff pre-stack depth migration function relatively well for regular acquisition geometries and well-constrained velocity models. Recently developed focusing pre-stack depth migration methods have the potential to enhance image quality in the case of sparse and non-regular source-receiver distribution. We have tested the performance of the coherency migration method as one of these focusing migration approaches in comparison to standard dip-moveout and Kirchhoff pre-stack time migration techniques by applying them to the Swayze East seismic profile acquired in the Abitibi greenstone belt of Canada. This seismic profile represents a crooked-line survey that intersects several metal-bearing deformation zones, providing good target geometries to examine various pre-stack migration methods. Analysis of the seismic data indicates reflectivity associated with shallowly dipping reflections appears relatively well preserved over the entire 0-6 km offset range for the frequency range between 20 to 90 Hz. Although most reflections are visible already in either the dip-moveout or the Kirchhoff pre-stack time migration results, the coherency migration method delivers the most improved image showing all reflective structures inferred for this area. The comparisons suggest the coherency migration method can be considered as superior in terms of resulting seismic image quality compared with conventional approaches for this type of crooked-line seismic survey in such a complex geological setting.

Subject headings and genre

NATURVETENSKAP Geovetenskap och miljövetenskap Geofysik hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geophysics hsv//eng
Abitibi greenstone belt
amplitude versus frequency
pre-stack depth migration
pre-stack time migration

Added entries (persons, corporate bodies, meetings, titles ...)

Hlousek, FelixTU Bergakad, Inst Geophys & Geoinformat, Freiberg, Germany. (author)
Buske, StefanTU Bergakad, Inst Geophys & Geoinformat, Freiberg, Germany. (author)
Malehmir, Alireza,1977-Uppsala universitet,Geofysik(Swepub:uu)almle363 (author)
Adetunji, AdemolaLaurentian Univ, Mineral Explorat Res Ctr, Harquail Sch Earth Sci, Goodman Sch Mines, Sudbury, ON, Canada. (author)
Haugaard, RasmusLaurentian Univ, Mineral Explorat Res Ctr, Harquail Sch Earth Sci, Goodman Sch Mines, Sudbury, ON, Canada. (author)
Snyder, DavidLaurentian Univ, Mineral Explorat Res Ctr, Harquail Sch Earth Sci, Goodman Sch Mines, Sudbury, ON, Canada. (author)
Vayavur, RajeshLaurentian Univ, Mineral Explorat Res Ctr, Harquail Sch Earth Sci, Goodman Sch Mines, Sudbury, ON, Canada. (author)
Laurentian Univ, Mineral Explorat Res Ctr, Harquail Sch Earth Sci, Goodman Sch Mines, Sudbury, ON, Canada.TU Bergakad, Inst Geophys & Geoinformat, Freiberg, Germany. (creator_code:org_t)

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In:Geophysical Prospecting: John Wiley & Sons71:7, s. 1096-11150016-80251365-2478

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By the author/editor: Cheraghi, Saeid; Hlousek, Felix; Buske, Stefan; Malehmir, Alirez ...; Adetunji, Ademol ...; Haugaard, Rasmus; show more...; Snyder, David; Vayavur, Rajesh; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geophysics

Articles in the publication: Geophysical Pros ...

By the university: Uppsala University

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