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Preliminary observations from the use of US-Soviet Joint Seismic Program data to model upper mantle triplications beneath Asia

Garnero, E. J. and Helmberger, D. V. and Burdick, L. J. (1993) Preliminary observations from the use of US-Soviet Joint Seismic Program data to model upper mantle triplications beneath Asia. Geophysical Journal International, 113 (1). pp. 252-259. ISSN 0956-540X. https://resolver.caltech.edu/CaltechAUTHORS:20180329-152142655

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Abstract

New short-period waveform data from the US-Soviet Joint Seismic Program (JSP) make possible investigations of Asian upper mantle structure. the goal of this paper is to explore the potential use of the newly available JSP data to gain a qualitative view of upper mantle structure beneath Asia, and to facilitate more detailed future detailed future upper mantle studies. In a reconnaissance approach, waveform upper mantle studies. In a reconnaissance approach, waveform predictions from upper mantle P-wave velocity models of previous studies are compared to the JSP data to investigate regional differences in the central Asian upper mantle. Data coverage brackets the upper mantle triplications with excellent multi-source-to-stations sections. the abundance of data for controlled source-receiver geometries and the impulsive nature of the arrivals enable us to stack seismograms to improve signal-to-noise ratio. Arrivals from the 400 and 670 km discontinuities are apparent in the data and are compared to predictions of the mantle models. the principal result is that, for the regions studied, paths through cratonic regions of Asia are compatible with shield-type models, while paths through highly deformed regions of Asia are compatible with models derived for tectonically active regions, suggesting large lateral variations beneath the Eurasian continent. Use of the JSP data in a comparative approach is fast and simple, and proves effective in obtaining a first-order understanding of the Asian upper mantle. This result also presents the potential for qualitative studies elsewhere with digital portable stations.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/j.1365-246X.1993.tb02544.xDOIArticle
https://academic.oup.com/gji/article/113/1/252/731980PublisherArticle
Additional Information:© 1992 Royal Astronomical Society. Accepted 1992 August 17. Received 1992 August 12; in original form 1991 December 27. The authors thank George Choy, Joan Gomberg and Peter Shearer for very constructive reviews, and Don L. Anderson, Laura Jones, and Paul Somerville for reading the manuscript. We also thank Paul Kovacs, Alan Ryall, and Richard Stead at CSS for assistance with the data set.
Group:Seismological Laboratory
Subject Keywords:stacking, synthetic seismograms, triplications
Issue or Number:1
Record Number:CaltechAUTHORS:20180329-152142655
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180329-152142655
Official Citation:E. J. Garnero, D. V. Helmberger, L. J. Burdick; Preliminary observations from the use of US-Soviet Joint Seismic Program data to model upper mantle triplications beneath Asia, Geophysical Journal International, Volume 113, Issue 1, 1 April 1993, Pages 252–259, https://doi.org/10.1111/j.1365-246X.1993.tb02544.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85509
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Mar 2018 22:30
Last Modified:03 Oct 2019 19:32

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