University of Leicester
Browse
JGR Planets - 2021 - Hall - The Distribution of Peak‐Ring Basins on Mercury and Their Correlation With the High‐Mg Si.pdf (1.81 MB)

The Distribution of Peak-Ring Basins on Mercury and Their Correlation With the High-Mg/Si Terrane

Download (1.81 MB)
journal contribution
posted on 2024-02-08, 14:46 authored by GP Hall, A Martindale, JC Bridges, LR Nittler, EJ Bunce
A catalog of mercurian craters that retain their central peak or peak-ring structure was created to aid target prioritization for the Mercury Imaging X-ray Spectrometer (MIXS), now on its way to Mercury aboard BepiColombo. Preliminary analysis of the MIXS crater catalog suggested a potential spatial correlation between an abnormally high spatial density of peak-ring basins and a region of Mercury with elevated Mg/Si values (High-Magnesium Terrane [HMT]). Robust statistical analysis of previously published crater catalogs confirmed that the spatial correlation exists, with an overall confidence level of 97.7%, specifically between peak-ring basins and the HMT, delineated by a contour of Mg/Si = mean + 2σ = 0.648. Applying empirical impact cratering scaling laws to the 15 basins intersecting the HMT suggested that all have excavated material from ~13 to 20 km depth. None of the basins excavated mantle material, predicting instead that deep crustal material contains elevated Mg/Si material. However, five of the basins are predicted to have melted underlying mantle material, which might be a contributing factor in the elevated Mg/Si signature. In the absence of resolvable volcanic features associated with the rise of basaltic melts from the mantle, we favor excavation of deep crustal, high Mg/Si material. MIXS-T is capable of spatially resolving individual features associated with peak-ring basins and it is proposed that the 15 basins within the HMT are prioritized targets for MIXS, to test the hypothesis of exposed deep-crustal material.

History

Author affiliation

School of Physics & Astronomy, University of Leicester

Version

  • VoR (Version of Record)

Published in

Journal of Geophysical Research: Planets

Volume

126

Issue

9

Publisher

American Geophysical Union (AGU)

issn

2169-9097

eissn

2169-9100

Copyright date

2021

Available date

2024-02-07

Notes

Unpaywall Reports states bronze. LCT/LT agreed to deposit the VOR 15.10.2021.

Language

en

Usage metrics

    University of Leicester Publications

    Categories

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC