The Open UniversitySkip to content
 

Evolving magmas, explosive eruptions and hydrothermal deposits at Nili Patea Caldera, Syrtis Major, Mars

Fawdon, P.; Skok, J. R.; Balme, M. R.; Vye-Brown, C.; Rothery, D. A. and Jordan, C. J. (2015). Evolving magmas, explosive eruptions and hydrothermal deposits at Nili Patea Caldera, Syrtis Major, Mars. In: 46th Lunar and Planetary Science Conference, 19-23 Mar 2012, Houston, TX.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (787kB) | Preview
URL: http://www.hou.usra.edu/meetings/lpsc2015/pdf/1783...
Google Scholar: Look up in Google Scholar

Abstract

Nili Patera is a 45 km diameter caldera at the centre of the Syrtis Major Planum volcanic province. Nili Patera is unique amongst martian volcanic terrains in that it is now below the surrounding planum and hosts a diverse range of volcanic landforms and mineralogies. Our work addresses the stratigraphic and structural context of the caldera, based on these important, and well-known, initial observations:
• Evidence of effusive and explosive volcanism.
• A compositional diversity from olivine-rich basalts to dacite and feldspathic units.
• Outcrops with spectral features indicative of hydrothermal silica in sinter mounds.
• Asymmetric collapse with a maximum subsidence of 1800 m; dropping the caldera floor below the surrounding volcanic shield.
• A 300 m high resurgent dome in the western caldera floor.
We present a geological map (figure 1) and stratigraphic history of Nili Patera (figure 2) in which these geological findings are put into a nine-part geological history (figure 3). Additionaly, we consider the implications of the caldera’s evolution for the evolution of Syrtis Major Planum and Highland Patera style volcanoes in general.

Item Type: Conference or Workshop Item
Copyright Holders: 2015 The Authors
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Related URLs:
Item ID: 42400
Depositing User: Peter Fawdon
Date Deposited: 25 Mar 2015 16:19
Last Modified: 15 May 2019 18:43
URI: http://oro.open.ac.uk/id/eprint/42400
Share this page:

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU