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True-amplitude processing techniques for marine, crustal-reflection seismic data

Author: Myung W Lee; Deborah R Hutchinson; Geological Survey (U.S.)
Publisher: [Washington, D.C.] : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports section, U.S. Geological Survey, 1990.
Series: U.S. Geological Survey bulletin, 1897.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
Preserving the relative true-amplitude of seismic traces provides significant advantages for deep crustal investigations, particularly for the identification and analysis of deep reflections originating near the crust-mantle boundary. Preserving lateraI variations along deep reflections is also important for resolving amplitude changes due to geologic causes rather than to artifacts from recording or source  Read more...
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Additional Physical Format: Online version:
Lee, Myung W.
True-amplitude processing techniques for marine, crustal-reflection seismic data
(OCoLC)889600355
Material Type: Government publication, National government publication, Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Myung W Lee; Deborah R Hutchinson; Geological Survey (U.S.)
OCLC Number: 20297140
Notes: Shipping list no.: 1990-460-P.
Description: iii, 22 pages : illustrations ; 28 cm.
Series Title: U.S. Geological Survey bulletin, 1897.
Other Titles: True-amplitude processing, marine, crustal-reflection seismic data
Responsibility: by Myung W. Lee and Deborah R. Hutchinson.

Abstract:

Preserving the relative true-amplitude of seismic traces provides significant advantages for deep crustal investigations, particularly for the identification and analysis of deep reflections originating near the crust-mantle boundary. Preserving lateraI variations along deep reflections is also important for resolving amplitude changes due to geologic causes rather than to artifacts from recording or source conditions. Three relative true-amplitude processing methods (automatic edit, single-trace equalization, and a common-depth-point gather equalization) were applied to the 20-second seismic data of the Great lakes Multidisciplinary Program on Crustal Evolution in order to evaluate the performance of the different techniques. Particular attention was paid to the improvement of signal-to-noise ratio and to the preservation of latera I continuity of the deep reflections. This study indicates that the automatic editing procedure based on the median amplitude of a common-depth-point gather provided substantial signal-to-noise ratio improvement of the seismic profiles. Post-stack amplitude balancing was commonly necessary to maintain the lateral continuity of the deep reflections and to reduce migration noise. The results from these processing strategies confirm the existence of large differences in crustal reflectivities and in the shape and geometry of crust-mantle transition beneath central and western lake Superior.

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