Abstrakti
We apply a full-scale 3D seismic virtual-source survey (VSS) for the purpose of near-mine mineral exploration in the Kylylahti sulfide deposit, Finland. Based on the ambient-noise (AN) characterization including beamforming results, we created a 10-days subset of AN recordings that were dominated by multi-azimuth high-velocity arrivals. We use an illumination-diagnosis and location procedure to show that the AN recordings associated with the high apparent velocities are related to body-wave events. Next, we produce 994 virtual-source gathers by applying seismic-interferometry processing by crosscorrelating AN at all receivers resulting in a full 3D VSS. We apply standard 3D time-domain reflectiondata processing and imaging using the subset and the full AN data, and validate both results against a pre-existing detailed geological information and 3D active-source data processed in the same way as the passive data. The resulting post-stack migrated sections show agreement of reflections between the passive and active data and indicate that VSS provides images where the active-source data are not available. In particular, the previously unknown extent of the ore-bearing complex was captured exclusively by passive data, which added a new geological insight into the Kylylahti formation. The methodological approach developed can be used in other areas in mineral exploration context.
Alkuperäiskieli | englanti |
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Otsikko | 83rd EAGE Conference and Exhibition 2022 |
Sivumäärä | 5 |
Kustantaja | European Association of Geoscientists and Engineers, EAGE |
Julkaisupäivä | 6 kesäk. 2022 |
Sivut | 572-576 |
ISBN (elektroninen) | 9781713859314 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 6 kesäk. 2022 |
OKM-julkaisutyyppi | A4 Artikkeli konferenssijulkaisuussa |
Tapahtuma | 83rd EAGE Conference and Exhibition 2022 - Madrid, Virtual, Espanja Kesto: 6 kesäk. 2022 → 9 kesäk. 2022 |
Julkaisusarja
Nimi | 83rd EAGE Conference and Exhibition 2022 |
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Vuosikerta | 1 |
Lisätietoja
Publisher Copyright:Copyright © 2022 by the European Association of Geoscientists & Engineers (EAGE). All rights reserved.
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