High resolution mapping of TiO2 abundances on the Moon using the Hubble Space Telescope

Details High resolution mapping of TiO2 abundances on the Moon using the Hubble Space Telescope High resolution mapping of TiO2 abundances on the Moon using the Hubble Space Telescope

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3413203r&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 13, CiteID L13203

Astronomy and Astrophysics

Astronomy

6

Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solid Surface Planets: Instruments And Techniques, Planetary Sciences: Solar System Objects: Moon (1221), Volcanology: Planetary Volcanism (5480, 6063, 8148)

Scientific paper

Samples of the lunar regolith returned by Apollo astronauts show large variations (0 to >10 wt%) in TiO2 abundance indicating complex compositional zonation within the lunar mantle. A long held goal of the lunar science community is the accurate determination of TiO2 abundances on the lunar surface through remote sensing methods. To date only limited progress has been made in this area using spacecraft spectral measurements acquired in visible through near-infrared wavelengths. Here we show that variations in the ratios of ultraviolet (UV) to visible (VIS) reflectances in images taken by the Hubble Space Telescope indicate a strong correlation with TiO2 abundances determined from returned samples at the Apollo 17 landing site, and little correlation with the ``maturity'' of lunar soils. These new findings imply that UV-VIS observations may lead to an alternate and improved method of remotely mapping TiO2-bearing materials (probably as ilmenite) across the lunar surface and enable more refined studies of lunar crustal composition, surface volcanism, and subsurface magma evolution processes. Additionally, accurate identification and quantification of TiO2 rich deposits serves to guide future human exploration of the Moon.

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