Memorial University DAI: High resolution seismic imaging of the near-surface : comparison of energy sources

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Title	High resolution seismic imaging of the near-surface : comparison of energy sources
Author	Xiang, Jianguang, 1963-
Description	Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Environmental Science
Date	2000
Pagination	viii, 124 leaves : ill., map
Subject	Seismic reflection method; Imaging systems in seismology
Degree	M.Sc.
Degree Grantor	Memorial University of Newfoundland.Environmental Science Programme
Discipline	Environmental Science
Language	eng
Notes	Bibliography: leaves 114-119
Abstract	The shallow seismic reflection method plays an important role in helping to understand engineering, mining and environmental problems. For high resolution at shallow depth, choosing a seismic source to best meet the goals of the survey can be the most pivotal decision. This research is to study the characteristics of various portable and environmentally friendly seismic sources by comparing them to the source character of a shotgun source. The sources include two SIST (Swept Impact Seismic Technique) vibrators and a hammer. Data were collected in 1999 near St. John's, Newfoundland. They were compared with shotgun source in terms of radiated frequency spectrum and energy levels in an attempt to improve the resolving power. -- Compared to the shotgun data, the SIST vibrators provide lower frequency range but higher frequency bandwidth. Their weaker energy limits the effective penetration depth for imaging to 150 m. However, the SIST vibrator yields a higher resolution in stacked section than the shotgun. Based on its overall performance, the SIST vibrator shows a great deal of potential to be a viable, environmentally friendly seismic source with high resolution capability. This is especially suitable for environmental surveys, in which depths are usually not more than 200 m.
Type	Text
Resource Type	Electronic thesis or dissertation
Format	Image/jpeg; Application/pdf
Source	Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier	a1493240
Rights	The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Collection	Electronic Theses and Dissertations
Scanning Status	Completed
PDF File	(15.41 MB) -- http://collections.mun.ca/PDFs/theses/Xiang_Jianguang.pdf
CONTENTdm file name	54765.cpd