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Constructional Volcanic Edifices on Mercury: Candidates and Hypotheses of Formation

Wright, Jack; Rothery, David A.; Balme, Matthew R. and Conway, Susan J. (2018). Constructional Volcanic Edifices on Mercury: Candidates and Hypotheses of Formation. Journal of Geophysical Research: Planets, 123(4) pp. 952–971.

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Mercury, a planet with a predominantly volcanic crust, has perplexingly few, if any, constructional volcanic edifices, despite their common occurrence on other solar system bodies with volcanic histories. Using image and topographical data from the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft, we describe two small (< 15 km‐diameter) prominences with shallow summit depressions associated with volcanically flooded impact features. We offer both volcanic and impact‐related interpretations for their formation, and then compare these landforms with volcanic features on Earth and the Moon. Though we cannot definitively conclude that these landforms are volcanic, the paucity of constructional volcanic edifices on Mercury is intriguing in itself. We suggest that this lack is because volcanic eruptions with sufficiently low eruption volumes, rates, and flow lengths, suitable for edifice construction, were highly spatiotemporally restricted during Mercury's geological history. We suggest that volcanic edifices may preferentially occur in association with late‐stage, post‐impact effusive volcanic deposits. The ESA/JAXA BepiColombo mission to Mercury will be able to investigate further our candidate volcanic edifices, search for other, as‐yet unrecognized edifices beneath the detection limits of MESSENGER data, and test our hypothesis that edifice construction is favored by late‐stage, low‐volume effusive eruptions.

Item Type: Journal Item
Copyright Holders: 2018 American Geophysical Union
ISSN: 1934-8843
Project Funding Details:
Funded Project NameProject IDFunding Body
Geological mapping of MercuryST/N50421X/1STFC (Science & Technology Facilities Council)
Not SetNot SetBritish Society for Geomorphology
Not SetNot SetUK Remote Sensing and Photogrammetry Society
Not SetNot SetUK Space Agency (UKSA)
Not SetST/M002101/1STFC (Science & Technology Facilities Council)
Astronomy and Planetary Sciences at the Open UniversityST/L000776/1STFC (Science & Technology Facilities Council)
Not SetST/N00399X/1STFC (Science & Technology Facilities Council)
Keywords: Mercury; volcano; volcanism; edifice; tectonism; impacts
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 54081
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 03 Apr 2018 13:18
Last Modified: 21 Feb 2020 04:30
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