Spinel elasticity and seismic structure of the transition zone of the mantle

THERE is continuing debate about whether the upper mantle is chemically stratified, and whether the seismic discontinuity at 400 km depth represents a chemical boundary, a phase change of the (Mg, Fe) 2 SiO 4 component from the β phase (olivine) to the p phase, or a combination of both. Recent devel...

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Veröffentlicht in:	Nature (London) 1991-11, Vol.354 (6349), p.143-145
Hauptverfasser:	Rigden, Sally M., Gwanmesia, Gabriel D., Gerald, John D. Fitz, Jackson, Lan, Liebermann, Robert C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Earth mantle Earth sciences Earth, ocean, space Earthquakes, seismology Exact sciences and technology Geology Humanities and Social Sciences Internal geophysics letter multidisciplinary Plate tectonics Science Science (multidisciplinary) Transition zone
Online-Zugang:	Volltext
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