Transition region of the earth's upper mantle

Details Transition region of the earth's upper mantle Transition region of the earth's upper mantle

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.320..321a&link_type=abstract

Nature (ISSN 0028-0836), vol. 320, March 27, 1986, p. 321-328.

Physics

148

Chemical Composition, Earth Mantle, Geochemistry, Basalt, Chondrites, Mineralogy, Peridotite, Seismic Waves, Stratification

Scientific paper

The chemistry of the earth's mantle is discussed using data from cosmochemistry, geochemistry, petrology, seismology, and mineral physics. The chondritic earth, the upper mantle and the 400-km discontinuity, the transition region, lower mantle mineralogy, and surface wave tomography are examined. Three main issues are addressed: (1) whether the mantle is homogeneous in composition or chemically stratified, (2) whether the major element chemistry of the mantle is more similar to upper mantle peridotites or to chondrites, and (3) the nature of the composition of the source region of basalts erupted at midocean ridges.

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