1 / 40

Petrologic Constraints on Mantle Temperature and Water Content

Petrologic Constraints on Mantle Temperature and Water Content. Marc Hirschmann University of Minnesota. Stixrude&Lithgow-Bertelloni, 2005. Stixrude&Lithgow-Bertelloni, 2005. Oceanic Crust Production Langmuir et al., 1992; Asimow et al., 2001. Trace amounts of H 2 O enhance melting….

gibson
Download Presentation

Petrologic Constraints on Mantle Temperature and Water Content

An Image/Link below is provided (as is) to download presentation 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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Petrologic Constraints on Mantle Temperature and Water Content Marc Hirschmann University of Minnesota

  2. Stixrude&Lithgow-Bertelloni, 2005

  3. Stixrude&Lithgow-Bertelloni, 2005

  4. Oceanic Crust Production Langmuir et al., 1992; Asimow et al., 2001

  5. Trace amounts of H2O enhance melting…. Hirth & Kohlstedt, 1996; Asimow & Langmuir, 2003

  6. Saal et al., 2002 MORB and seamount glasses Easter Microplate CO2 (wt.%) Kingley et al. 2002 H2O (wt.%)

  7. H2O Storage Capacity

  8. Hirth & Kohlstedt, 1996

  9. Aubaud et al., GRL, 2004

  10. Hirth & Kohlstedt, 1996 Aubaud et al., GRL, 2004

  11. MELT Experiment beneath EPR Gu et al. (2005) The MELT Seismic Team (1998)

  12. Dasgupta & Hirschmann (2006) - Nature

  13. Carbonated Melt Catalyzes Grain Growth Supersolidus Subsolidus Dasgupta et al., 2004 Dasgupta et al. (2004) - EPSL

  14. Dasgupta & Hirschmann (2006) - Nature

  15. Origin of Chemical Lithosphere and Volatile induced Melting of Peridotite Hirth & Kohlstedt (1996) Aubaud et al., 2004 Peridotite Dehydration is aided by Partial Melting

  16. Dasgupta & Hirschmann (2006) - Nature

  17. Deep Carbonated Silicate Melting Beneath Ridges Transition from carbonatite to carbonated silicate melts at 3 GPa Silicate Melting is enhanced in presence of carbonate Dasgupta & Hirschmann (submitted)

  18. Deep Carbonated Silicate Melting & H2O Extraction Beneath Ridges

  19. Schmidt+Poli, 1998

  20. Honshu - Van Keken, 2003

  21. (from Gaetani+Grove, 2003)

  22. Tim Grove - unpublished results (thanks, Tim!)

  23. High Temperature Melt or Fluid Transfer from the Slab Elliott, 2003

  24. Kelemen et al. 2003

  25. Davies&Stevenson, 1992 Mibe et al., 2001

  26. Temperatures at the base of the crust based on metamorphic thermobarometry Kelemen et al., 2003

  27. Mt. Shasta-Medicine Lake (Elkins Tanton et al., 2001)

  28. Thanks for listening…..

More Related