Polygenic eruptions on Alba Patera, Mars

Mouginis-Mark, P. J. and Wilson, L. and Zimbelman, J. R. (1988) Polygenic eruptions on Alba Patera, Mars. Bulletin of Volcanology, 50 (6). pp. 361-379. ISSN 0258-8900

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Abstract

A combination of photogeologic mapping, analysis of Viking Orbiter thermal inertia data, and numerical modelling of eruption conditions has permitted us to construct a new model for the evolution of the martian volcano Alba Patera. Numerous digitate channel networks on the flanks of the volcano are interpreted to be carved by sapping due to the release of non-juvenile water from unconsolidated flank deposits. Using the thermal inertia measurements, we estimate the particle size of these deposits to be 3-10 μm, which, together with theoretical modelling of the disperison of explosively derived volcanic materials, leads us to conclude that the flank deposits on Alba Patera are low-relief pyroclastic flows. The recognition of numerous late-stage summit and sub-terminal lava flows thus makes Alba Patera a unique martian volcano that is transitional between the older pyroclastic-dominated highland paterae and the more recent effusive central-vent volcanoes such as the Tharsis Montes.

Item Type: Journal Article
Journal or Publication Title: Bulletin of Volcanology
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/1900/1906
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 134668
Deposited By: ep_importer_pure
Deposited On: 22 Jun 2019 09:16
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 12:03
URI: https://eprints.lancs.ac.uk/id/eprint/134668

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