Interpretation of low degree components of gravitational potential in terms of undulations of mantle phase boundaries

McQueen H.W.S. and Stacey F.D. (1976) Interpretation of low degree components of gravitational potential in terms of undulations of mantle phase boundaries. Tectonophysics, 34 1-2: . doi:10.1016/0040-1951(76)90173-6


Author McQueen H.W.S.
Stacey F.D.
Title Interpretation of low degree components of gravitational potential in terms of undulations of mantle phase boundaries
Journal name Tectonophysics   Check publisher's open access policy
ISSN 0040-1951
Publication date 1976-09-01
Sub-type Article (original research)
DOI 10.1016/0040-1951(76)90173-6
Volume 34
Issue 1-2
Total pages 1
Subject 1904 Performing Arts and Creative Writing
1908 Geophysics
Abstract The supposition that spherical harmonic components of degrees 4-20 in the gravitational potential of the earth are the long wavelength spectral components of relatively sharp protrusions on nearly spherical boundaries, such as mantle phase boundaries, is examined from a statistical viewpoint. It is concluded that: 1. (1) the only important boundaries are at depth less than 1000 km; 2. (2) the two principal boundaries have a strong negative correlation, that is, highs of one correspond to lows of the other; 3. (3) the lower of the two boundaries has a greater product density contrast × r.m.s. amplitude by a factor about 1.5. The magnitudes of the undulations are consistent with narrow elevations and depressions of phase boundaries of order 100 km height in the downgoing lithospheric slabs at subduction zones.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 14 Jun 2016, 13:40:24 EST by System User