Tharsis-sourced relatively dust-free lavas and their possible relationship to Martian meteorites

Nicholas P. Lang, Livio L. Tornabene, Harry Y. McSween, Philip Christensen

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The launch sites for Martian (SNC) meteorites remain unknown, but they must derive from young volcanic provinces. We present the first geologic and spectroscopic characteristics of a suite of relatively dust-free lava flows that extend from underneath the regional dust cover on the south flank of the Tharsis volcanic province on Mars. The purpose of this work is to (1) characterize these flows geologically by using THermal EMission Imaging System (THEMIS) data supplemented by Mars Orbital Laser Altimeter (MOLA), Mars Orbital Camera (MOC), and High Resolution Imaging Science Experiment (HiRISE) datasets and (2) use Thermal Emission Spectrometer (TES) data in order to test the hypothesis that Tharsis represents a source for the SNCs. These flows are morphologically similar to flood lavas in Amazonis Planitia with the flow surfaces being a complex mixture of surficial materials with limited exposure. The spectrally derived mineral composition and geochemistry for three flows, reveals basaltic compositions that have an affinity with SNCs, especially the basaltic shergottites. However, discrepancies between spectra and mineral percentages for the flows versus the shergottites, together with the observation of surface deposits on the flow surfaces, make any connection between these flows and the SNCs tenuous, although not impossible. Further testing of a Tharsis-SNC relationship will require measurements at finer spatial resolutions, perhaps even in-situ.

Original languageEnglish (US)
Pages (from-to)103-115
Number of pages13
JournalJournal of Volcanology and Geothermal Research
Volume185
Issue number1-2
DOIs
StatePublished - Aug 10 2009

Fingerprint

SNC meteorites
Meteorites
Martian meteorite
Dust
dust
Minerals
Aneroid altimeters
Geochemistry
shergottites
Mars
mars
Complex Mixtures
Chemical analysis
Imaging systems
Spectrometers
thermal emission
Deposits
Cameras
Imaging techniques
volcanology

Keywords

  • Arsia Mons
  • basaltic shergottites
  • dust-free lava flows
  • SNCs
  • Tharsis

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Tharsis-sourced relatively dust-free lavas and their possible relationship to Martian meteorites. / Lang, Nicholas P.; Tornabene, Livio L.; McSween, Harry Y.; Christensen, Philip.

In: Journal of Volcanology and Geothermal Research, Vol. 185, No. 1-2, 10.08.2009, p. 103-115.

Research output: Contribution to journalArticle

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