Passive seismic interferometry for subsurface imaging in an active mine environment: case study from the Kylylahti Cu-Au-Zn mine, Finland

Michal Chamarczuk, Michal Malinowski, Emilia Koivisto, Suvi Heinonen, Sanna Juurela, COGITO-MIN Working Group

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKonferenssiartikkeliAmmatillinen

Abstrakti

Correlations of ambient seismic noise recordings can lead to reconstruction of both surface and body waves. Extraction of body waves is more challenging because noise recordings are usually dominated by surface wave energy. Despite that, a few studies have shown that extraction of body waves is possible. In order to investigate the capability of ambient noise seismic interferometry in ore exploration, a full-scale 3D passive seismic experiment was conducted in Kylylahti mining area, eastern Finland. We used 50 m receiver spacing, array of ~1000 receivers and about 30 days recording time. Presented results indicate that road traffic and mine activities (both surface and underground) have dominant influence on noise characteristics in the survey area and generate omni-direectional noise of broad frequency spectrum. We observe possible body wave arrivals in high frequency range (>35 Hz) potentially related to underground mining activity sources. Such noise panels were used in virtual shot gather retrieval with clear body wave arrivals present.
Alkuperäiskielienglanti
OtsikkoProceedings of Exploration’ 17 : Seismic Methods & Exploration Workshop
ToimittajatG. Bellefleur, B. Milkereit
Sivumäärä6
KustantajaDecennial Mineral Exploration Conferences
Julkaisupäivälokak. 2017
Sivut51-56
Artikkeli noPaper 9
TilaJulkaistu - lokak. 2017
OKM-julkaisutyyppiD3 Artikkeli ammatillisessa konferenssijulkaisussa
TapahtumaExploration - Toronto, Kanada
Kesto: 21 lokak. 201725 lokak. 2017

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