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Transition region of the earth's upper mantleThe 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.
Document ID
19860050790
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Anderson, D. L.
(California Institute of Technology Pasadena, United States)
Bass, J. D.
(Illinois, University Urbana, United States)
Date Acquired
August 12, 2013
Publication Date
March 27, 1986
Publication Information
Publication: Nature
Volume: 320
ISSN: 0028-0836
Subject Category
Geophysics
Accession Number
86A35528
Funding Number(s)
CONTRACT_GRANT: NSG-7610
CONTRACT_GRANT: NSF EAR-83-17623
CONTRACT_GRANT: NSF EAR-81-15236
Distribution Limits
Public
Copyright
Other

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