1 / 13

BepiColombo at Mercury from crustal composition to mantle composition

BepiColombo at Mercury from crustal composition to mantle composition. David Rothery, Dept of Earth & Environmental Sciences D.A.Rothery@open.ac.uk With thanks to the ESA Mercury Surface & Composition Working Group. Primary & Secondary crust defined by Taylor, S. R. (1982, 1989).

atira
Download Presentation

BepiColombo at Mercury from crustal composition to mantle composition

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. BepiColombo at Mercury from crustal compositionto mantle composition David Rothery, Dept of Earth & Environmental Sciences D.A.Rothery@open.ac.uk With thanks to the ESA Mercury Surface & Composition Working Group

  2. Primary & Secondary crust defined by Taylor, S. R. (1982, 1989)

  3. Lunar crust examples Mixed crust types(if you don’t recognise the distinction!) Primary crust (70% of nearside) Secondary crust (30% of nearside)

  4. ‘Average crust’: • reflects arbitrary proportions of exposedareas of primary and secondary crust • conflates two entirely different processesof crust-formation • We cannot back-track from crust composition to mantle composition unless we: • recognise how the crust formed • measure and model primary crust • and secondary crust separately

  5. BepiColombo MIXS elements Spatial resolution 10s to 100s kmdepending on abundance and solar state

  6. Primary crust?(probably not in this example) Secondary crust < 350 km > Mariner-10 PIA02443

  7. Scale of variation within secondary crust(Caloris, MESSENGER) Fresh ejecta Older Younger Deposit on floor of Sander crater Dark halo & walls (exposed/excavated primary crust?) < 40 km >

  8. pi Matisse pi Matisse ejecta overlies intercrater plains Primarycrust exposedin walls? Embays Matisseejecta

  9. Look for primary crust here ? < M a t i s s e > Matisse-fill lava post-Matisse ejecta ps lava Matisse ejecta pi lava Primary crust

More Related