Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland

Suvi Heinonen, Michal Malinowski, Felix Hlousek, Gardar Gislason, Stefan Buske, Emilia Anna-Liisa Koivisto, Marek Wojdyla

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

We show that by using an advanced pre-stack depth imaging algorithm it is possible to retrieve meaningful and robust seismic images with sparse shot points, using only 3-4 source points per kilometer along a seismic profile. Our results encourage the use of 2D seismic reflection profiling as a reconnaissance tool for mineral exploration in areas with limited access for active seismic surveys. We used the seismic data acquired within the COGITO-MIN project comprising two approximately 6 km long seismic reflection profiles at the polymetallic Kylylahti massive sulfide mine site in eastern Finland. The 2D seismic data acquisition utilized both Vibroseis and dynamite sources with 20 m spacing and wireless receivers spaced every 10 m. For both source types, the recorded data show clear first breaks over all offsets and reflectors in the raw shot gathers. The Kylylahti area is characterized by folded and faulted, steeply dipping geological contacts and structures. We discuss post-stack and pre-stack data processing and compare time and depth imaging techniques in this geologically complex Precambrian hardrock area. The seismic reflection profiles show prominent reflectors at 4.5-8 km depth utilizing different migration routines. In the shallow subsurface, steep reflectors are imaged, and within and underneath the known Kylylahti ultramafic body reflectivity is prominent but discontinuous.

Alkuperäiskielienglanti
Artikkeli263
LehtiMinerals
Vuosikerta9
Numero5
Sivut263-278
Sivumäärä15
ISSN2075-163X
DOI - pysyväislinkit
TilaJulkaistu - toukokuuta 2019
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 1171 Geotieteet

Lainaa tätä

Heinonen, S., Malinowski, M., Hlousek, F., Gislason, G., Buske, S., Koivisto, E. A-L., & Wojdyla, M. (2019). Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland. Minerals, 9(5), 263-278. [263]. https://doi.org/10.3390/min9050263
Heinonen, Suvi ; Malinowski, Michal ; Hlousek, Felix ; Gislason, Gardar ; Buske, Stefan ; Koivisto, Emilia Anna-Liisa ; Wojdyla, Marek. / Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland. Julkaisussa: Minerals. 2019 ; Vuosikerta 9, Nro 5. Sivut 263-278.
@article{141a30cca48b4f9e8fdb296c1937c173,
title = "Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland",
abstract = "We show that by using an advanced pre-stack depth imaging algorithm it is possible to retrieve meaningful and robust seismic images with sparse shot points, using only 3-4 source points per kilometer along a seismic profile. Our results encourage the use of 2D seismic reflection profiling as a reconnaissance tool for mineral exploration in areas with limited access for active seismic surveys. We used the seismic data acquired within the COGITO-MIN project comprising two approximately 6 km long seismic reflection profiles at the polymetallic Kylylahti massive sulfide mine site in eastern Finland. The 2D seismic data acquisition utilized both Vibroseis and dynamite sources with 20 m spacing and wireless receivers spaced every 10 m. For both source types, the recorded data show clear first breaks over all offsets and reflectors in the raw shot gathers. The Kylylahti area is characterized by folded and faulted, steeply dipping geological contacts and structures. We discuss post-stack and pre-stack data processing and compare time and depth imaging techniques in this geologically complex Precambrian hardrock area. The seismic reflection profiles show prominent reflectors at 4.5-8 km depth utilizing different migration routines. In the shallow subsurface, steep reflectors are imaged, and within and underneath the known Kylylahti ultramafic body reflectivity is prominent but discontinuous.",
keywords = "1171 Geosciences, seismic reflection, massive sulfide, seismic imaging, mineral exploration, cost-effective seismics, pre-stack depth migration, Finland, Outokumpu, FRESNEL VOLUME MIGRATION, HOST ROCKS, OUTOKUMPU",
author = "Suvi Heinonen and Michal Malinowski and Felix Hlousek and Gardar Gislason and Stefan Buske and Koivisto, {Emilia Anna-Liisa} and Marek Wojdyla",
year = "2019",
month = "5",
doi = "10.3390/min9050263",
language = "English",
volume = "9",
pages = "263--278",
journal = "Minerals",
issn = "2075-163X",
publisher = "MDPI",
number = "5",

}

Heinonen, S, Malinowski, M, Hlousek, F, Gislason, G, Buske, S, Koivisto, EA-L & Wojdyla, M 2019, 'Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland', Minerals, Vuosikerta 9, Nro 5, 263, Sivut 263-278. https://doi.org/10.3390/min9050263

Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland. / Heinonen, Suvi; Malinowski, Michal; Hlousek, Felix; Gislason, Gardar; Buske, Stefan; Koivisto, Emilia Anna-Liisa; Wojdyla, Marek.

julkaisussa: Minerals, Vuosikerta 9, Nro 5, 263, 05.2019, s. 263-278.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Cost-effective seismic exploration: 2D reflection imaging at the Kylylahti massive sulfide deposit, Finland

AU - Heinonen, Suvi

AU - Malinowski, Michal

AU - Hlousek, Felix

AU - Gislason, Gardar

AU - Buske, Stefan

AU - Koivisto, Emilia Anna-Liisa

AU - Wojdyla, Marek

PY - 2019/5

Y1 - 2019/5

N2 - We show that by using an advanced pre-stack depth imaging algorithm it is possible to retrieve meaningful and robust seismic images with sparse shot points, using only 3-4 source points per kilometer along a seismic profile. Our results encourage the use of 2D seismic reflection profiling as a reconnaissance tool for mineral exploration in areas with limited access for active seismic surveys. We used the seismic data acquired within the COGITO-MIN project comprising two approximately 6 km long seismic reflection profiles at the polymetallic Kylylahti massive sulfide mine site in eastern Finland. The 2D seismic data acquisition utilized both Vibroseis and dynamite sources with 20 m spacing and wireless receivers spaced every 10 m. For both source types, the recorded data show clear first breaks over all offsets and reflectors in the raw shot gathers. The Kylylahti area is characterized by folded and faulted, steeply dipping geological contacts and structures. We discuss post-stack and pre-stack data processing and compare time and depth imaging techniques in this geologically complex Precambrian hardrock area. The seismic reflection profiles show prominent reflectors at 4.5-8 km depth utilizing different migration routines. In the shallow subsurface, steep reflectors are imaged, and within and underneath the known Kylylahti ultramafic body reflectivity is prominent but discontinuous.

AB - We show that by using an advanced pre-stack depth imaging algorithm it is possible to retrieve meaningful and robust seismic images with sparse shot points, using only 3-4 source points per kilometer along a seismic profile. Our results encourage the use of 2D seismic reflection profiling as a reconnaissance tool for mineral exploration in areas with limited access for active seismic surveys. We used the seismic data acquired within the COGITO-MIN project comprising two approximately 6 km long seismic reflection profiles at the polymetallic Kylylahti massive sulfide mine site in eastern Finland. The 2D seismic data acquisition utilized both Vibroseis and dynamite sources with 20 m spacing and wireless receivers spaced every 10 m. For both source types, the recorded data show clear first breaks over all offsets and reflectors in the raw shot gathers. The Kylylahti area is characterized by folded and faulted, steeply dipping geological contacts and structures. We discuss post-stack and pre-stack data processing and compare time and depth imaging techniques in this geologically complex Precambrian hardrock area. The seismic reflection profiles show prominent reflectors at 4.5-8 km depth utilizing different migration routines. In the shallow subsurface, steep reflectors are imaged, and within and underneath the known Kylylahti ultramafic body reflectivity is prominent but discontinuous.

KW - 1171 Geosciences

KW - seismic reflection

KW - massive sulfide

KW - seismic imaging

KW - mineral exploration

KW - cost-effective seismics

KW - pre-stack depth migration

KW - Finland

KW - Outokumpu

KW - FRESNEL VOLUME MIGRATION

KW - HOST ROCKS

KW - OUTOKUMPU

U2 - 10.3390/min9050263

DO - 10.3390/min9050263

M3 - Article

VL - 9

SP - 263

EP - 278

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 5

M1 - 263

ER -