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Nd and Sr isotopic compositions of East African carbonatites: Implications for mantle heterogeneity

1987; Geological Society of America; Volume: 15; Issue: 2 Linguagem: Inglês

10.1130/0091-7613(1987)15 2.0.co;2

1943-2682

Keith Bell, John Blenkinsop,

Geomagnetism and Paleomagnetism Studies

Research Article| February 01, 1987 Nd and Sr isotopic compositions of East African carbonatites: Implications for mantle heterogeneity Keith Bell; Keith Bell 1Ottawa-Carleton Centre for Geoscience Studies, Department of Geology, Carleton University Ottawa, Ontario K1S 5B6, Canada Search for other works by this author on: GSW Google Scholar John Blenkinsop John Blenkinsop 1Ottawa-Carleton Centre for Geoscience Studies, Department of Geology, Carleton University Ottawa, Ontario K1S 5B6, Canada Search for other works by this author on: GSW Google Scholar Geology (1987) 15 (2): 99–102. https://doi.org/10.1130/0091-7613(1987)15 2.0.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Keith Bell, John Blenkinsop; Nd and Sr isotopic compositions of East African carbonatites: Implications for mantle heterogeneity. Geology 1987;; 15 (2): 99–102. doi: https://doi.org/10.1130/0091-7613(1987)15 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 Sr and Nd isotopic data from some young carbonatites from East Africa exhibit an excellent negative correlation on an ϵSr - ϵNd diagram. A simple mixing model involving continental crust was tested and found not to fit the isotope patterns. The mixing of two mantle sources is preferred, one being depleted and the other slightly enriched in the large ion lithophile elements relative to bulk earth. The presence of a depleted source below the Tanzanian Shield is consistent with findings from some Canadian carbonatites. 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.