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Chemical stratification in the silicate earthA primary stratigraphic model is presented for the distribution of depleted, enriched, and primordial isotopic mantle components that have been formed by the transport of magmas at the begining of geological history. Depleted midoceanic ridge basalt source regions were established in the uppermost part of the upper mantle, while the primordial mantle was located at the middle and deepest regions of an upper mantle which was processed by anhydrous melting and crystallization. The lower mantle became heterogeneous, with enrichments at the top and depletions elsewhere. It is suggested that the present day isotopic structure of the mantle has inherited elements of this primary stratification.
Document ID
19840043605
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Herzberg, C. T.
(Rutgers University New Brunswick, NJ, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1983
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 67
Issue: 2 Fe
ISSN: 0012-821X
Subject Category
Geophysics
Accession Number
84A26392
Funding Number(s)
CONTRACT_GRANT: NAGW-177
Distribution Limits
Public
Copyright
Other

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