Uniformity of Mantle Composition

Research Article| February 01, 1975 Uniformity of Mantle Composition J. Peter Watt; J. Peter Watt 1Center for Earth and Planetary Physics, Harvard University, Cambridge, Massachusetts 02138 Search for other works by this author on: GSW Google Scholar T. J. Shankland; T. J. Shankland 1Center for Earth and Planetary Physics, Harvard University, Cambridge, Massachusetts 02138 Search for other works by this author on: GSW Google Scholar Nai-hsien Mao Nai-hsien Mao 2Hoffman Laboratory, Harvard University, Cambridge, Massachusetts 02138 Search for other works by this author on: GSW Google Scholar Author and Article Information J. Peter Watt 1Center for Earth and Planetary Physics, Harvard University, Cambridge, Massachusetts 02138 T. J. Shankland 1Center for Earth and Planetary Physics, Harvard University, Cambridge, Massachusetts 02138 Nai-hsien Mao 2Hoffman Laboratory, Harvard University, Cambridge, Massachusetts 02138 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1975) 3 (2): 91–94. https://doi.org/10.1130/0091-7613(1975)3<91:UOMC>2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation J. Peter Watt, T. J. Shankland, Nai-hsien Mao; Uniformity of Mantle Composition. Geology 1975;; 3 (2): 91–94. doi: https://doi.org/10.1130/0091-7613(1975)3<91:UOMC>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Two recent forms of velocity-density relations have been inverted using Earth models derived from free-oscillation data to infer mean atomic weight profiles for the mantle. Within present uncertainty there is no evidence for discontinuities in mean atomic weight m̅; from below the crust to just above the core-mantle boundary. The best value for a constant m̅ is 21.1 ± 0.4 g/mole. Uniform m̅ is consistent with whole-mantle convection and with diminished total iron content of the Earth. Because the mean atomic weight profiles are sensitive to small differences among the normal-mode Earth models, further refinement of these models is of great interest. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.