Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents

Publication Type  Journal Article
Year of Publication  1994
Authors  Miller, D. M.; Goldstein, S. L.; Langmuir, C. H.
Journal Title  Nature
Volume  368
Issue  6471
Pages  514-520
Journal Date  Apr 7
ISBN Number  0028-0836
Accession Number  ISI:A1994NE33500044
Key Words  trace-element constraints; island-arc; mantle evolution; sr isotopes; chemical-structure; oceanic basalts; lesser antilles; volcanic-rocks; pb; plumes

Lead is anomalously enriched in the Earth's continental crust, and in the magmas that give rise to new continental crust at convergent margins. A detailed study of volcanic rocks from the Aleutian island arc shows that this enrichment is a continuing process, and results from the efficient non-magmatic transfer of mantle-derived lead into the source of convergent-margin magmas. This process, acting through time, can also account for the pervasive depletion of lead in the oceanic mantle.


Ne335Times Cited:146Cited References Count:64

URL  <Go to ISI>://A1994NE33500044