Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland
The reflection seismic surveying method is useful when conducting mineral exploration in the crystalline bedrock because of its good depth extent and resolution. However, the traditional experiments with active sources are expensive and difficult to carry out, especially in remote areas or in conser...
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2019
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/302127 2023-08-20T04:07:41+02:00 Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland Väkevä, Sakari Helsingin yliopisto, Matemaattis-luonnontieteellinen tiedekunta University of Helsinki, Faculty of Science Helsingfors universitet, Matematisk-naturvetenskapliga fakulteten 2019 application/pdf http://hdl.handle.net/10138/302127 eng eng Helsingin yliopisto University of Helsinki Helsingfors universitet URN:NBN:fi:hulib-201905242115 http://hdl.handle.net/10138/302127 Geologian ja geofysiikan maisteriohjelma Master's Programme in Geology and Geophysics Magisterprogrammet i geologi och geofysik none Kiinteän maan geofysiikka Solid Earth Geophysics Den fasta jordens fysik pro gradu -tutkielmat master's thesis pro gradu-avhandlingar 2019 ftunivhelsihelda 2023-07-28T06:07:06Z The reflection seismic surveying method is useful when conducting mineral exploration in the crystalline bedrock because of its good depth extent and resolution. However, the traditional experiments with active sources are expensive and difficult to carry out, especially in remote areas or in conservation areas where mineral exploration is limited due to environmental reasons. Recently, a number of theoretical advances have proven that passive soundings utilizing ambient seismic noise can provide new opportunities for seismic imaging and contribute to data generation for reflection seismic surveys, without the need for explosive or vibratory sources. One of the most promising new methods is seismic interferometry (SI), where the impulse response between two receivers is reconstructed by correlating their signals with each other. COGITO-MIN is a joint project between the University of Helsinki, the Geological Survey of Finland, Polish Academy of Sciences, and industrial partners with the aim of investigating and developing new cost-effective seismic exploration methods in the crystalline bedrock. Within the framework of the project, a passive seismic experiment was carried out in which 45 three-component geophones were deployed for a month in the vicinity of the polymetallic Kylylahti Mine in Polvijärvi, northern Karelia, where the mining operator is the Swedish metal company Boliden. The original purpose of these geophones was to collect data suitable for detecting underground cavities related to underground nuclear explosions. The institute that collected the data was CTBTO (Comprehensive Test Ban Treaty Organization) whose task is to monitor the treaty in the pre-ratification stage. The purpose of this Master's thesis was to develop an SI workflow for the three-component data and to investigate the method's performance in an area where local geology is known after nearly 40 years of exploration and consequent mining operations. The specific scientific objectives of the thesis are (1) to demonstrate the ... Master Thesis karelia* Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
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Open Polar |
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Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Geologian ja geofysiikan maisteriohjelma Master's Programme in Geology and Geophysics Magisterprogrammet i geologi och geofysik none Kiinteän maan geofysiikka Solid Earth Geophysics Den fasta jordens fysik |
spellingShingle |
Geologian ja geofysiikan maisteriohjelma Master's Programme in Geology and Geophysics Magisterprogrammet i geologi och geofysik none Kiinteän maan geofysiikka Solid Earth Geophysics Den fasta jordens fysik Väkevä, Sakari Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland |
topic_facet |
Geologian ja geofysiikan maisteriohjelma Master's Programme in Geology and Geophysics Magisterprogrammet i geologi och geofysik none Kiinteän maan geofysiikka Solid Earth Geophysics Den fasta jordens fysik |
description |
The reflection seismic surveying method is useful when conducting mineral exploration in the crystalline bedrock because of its good depth extent and resolution. However, the traditional experiments with active sources are expensive and difficult to carry out, especially in remote areas or in conservation areas where mineral exploration is limited due to environmental reasons. Recently, a number of theoretical advances have proven that passive soundings utilizing ambient seismic noise can provide new opportunities for seismic imaging and contribute to data generation for reflection seismic surveys, without the need for explosive or vibratory sources. One of the most promising new methods is seismic interferometry (SI), where the impulse response between two receivers is reconstructed by correlating their signals with each other. COGITO-MIN is a joint project between the University of Helsinki, the Geological Survey of Finland, Polish Academy of Sciences, and industrial partners with the aim of investigating and developing new cost-effective seismic exploration methods in the crystalline bedrock. Within the framework of the project, a passive seismic experiment was carried out in which 45 three-component geophones were deployed for a month in the vicinity of the polymetallic Kylylahti Mine in Polvijärvi, northern Karelia, where the mining operator is the Swedish metal company Boliden. The original purpose of these geophones was to collect data suitable for detecting underground cavities related to underground nuclear explosions. The institute that collected the data was CTBTO (Comprehensive Test Ban Treaty Organization) whose task is to monitor the treaty in the pre-ratification stage. The purpose of this Master's thesis was to develop an SI workflow for the three-component data and to investigate the method's performance in an area where local geology is known after nearly 40 years of exploration and consequent mining operations. The specific scientific objectives of the thesis are (1) to demonstrate the ... |
author2 |
Helsingin yliopisto, Matemaattis-luonnontieteellinen tiedekunta University of Helsinki, Faculty of Science Helsingfors universitet, Matematisk-naturvetenskapliga fakulteten |
format |
Master Thesis |
author |
Väkevä, Sakari |
author_facet |
Väkevä, Sakari |
author_sort |
Väkevä, Sakari |
title |
Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland |
title_short |
Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland |
title_full |
Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland |
title_fullStr |
Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland |
title_full_unstemmed |
Using Three-Component Data for Seismic Interferometry Studies at the Kylylahti Mine, Eastern Finland |
title_sort |
using three-component data for seismic interferometry studies at the kylylahti mine, eastern finland |
publisher |
Helsingin yliopisto |
publishDate |
2019 |
url |
http://hdl.handle.net/10138/302127 |
genre |
karelia* |
genre_facet |
karelia* |
op_relation |
URN:NBN:fi:hulib-201905242115 http://hdl.handle.net/10138/302127 |
_version_ |
1774719514039025664 |