A Large-scale isotope anomaly in the Southern Hemisphere mantle. Stanley R. Hart. Figure 14-9. (Winter) From Hart (1984) Nature, 309, 753-756. Can Generate tholeiitic and alkaline basalts from a chemically uniform mantle. Variables Temperature Pressure.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
A Large-scale isotope anomaly in the Southern Hemisphere mantle
Stanley R. Hart
Figure 14-9. (Winter) From Hart (1984) Nature, 309, 753-756.
Figure 10-2 (Winter) Phase diagram of aluminous lherzolite with melting interval (gray), sub-solidus reactions, and geothermal gradient. After Wyllie, P. J. (1981). Geol. Rundsch. 70, 128-153.
Figure 14-2. (Winter) After Wilson (1989) Igneous Petrogenesis. Kluwer.
Pb produced by radioactive decay of U & Th
238U 234U 206Pb
Pb is quite scarce in the mantle
Figure 14-8. After Wilson (1989) Igneous Petrogenesis. Kluwer. Data from Hamelin and Allègre (1985), Hart (1984), Vidal et al. (1984).
Figure 14-9. From Hart (1984) Nature, 309, 753-756.
A Model for Oceanic Magmatism
EM and HIMU from crustal sources (subducted OC + CC seds)
Figure 14-10. Nomenclature from Zindler and Hart (1986). After Wilson (1989) and Rollinson (1993).