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| Titel |
Quantitative investigation of the mineral pyroxene using NIR SIR-2 data |
| VerfasserIn |
U. Mall, R. Bugiolacchi, M. Bhatt |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250065643
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| Zusammenfassung |
| One of the most important objectives of lunar remote sensing remains the investigation of the
abundance and distribution of the major minerals across the Moon’s surface. The
ongoing investigation of basalt suites from the Moon and terrestrial planets shows
characteristic compositional differences relating to their evolution, source regions and mode
of eruption, which are typical of each particular geological setting and thermal
history.
Pyroxenes are the dominant mafic minerals on the lunar surface and most solid planetary
bodies. Broadly speaking, orhtopyroxene and pigeonite (ca-poor pyroxenes) are characteristic
of primitive melt bodies, while clinopyroxene, the calcium-rich phase, has been found to be
the major mafic phase in the maria and typical of more evolved magmas. Coexisting and
zoned high-Ca and low-Ca pyroxenes can reveal the petrological origin and evolution of a
wide range of rocks.
Pyroxenes’ prominent spectral absorption features at one and two microns in the
near-infrared (NIR) spectral region make them ideal targets for remote sensing investigations
(i.e. Hunt and Salisbury, 1970; Adams 1975, 1975; Rossman, 1980).
Several lunar maps of pyroxene distribution have been produced (i.e. McCord et al.,
1981), most based on data products from the Clementine mission (i.e. Shkuratov et al., 2005).
Hyperspectral data from recent space missions, such as the Chandrayaan-1, which carried
several spectrometers (M3, HySi, and SIR-2), provide unprecedented high spectral and
spatial resolution (away from the laboratory) to attempt a quantitative approach on the
mineral’s distribution (i.e. Sunshine and Pieters, 1993).
Here we report on the identification and abundance measurements of pyroxenes through
the analysis and interpretation of NIR data from the SIR-2 instrument.
References
Adams, J.B., 1975. Interpretation of visible and near-infrared diffuse reflectance spectra
of pyroxenes and other rock-forming minerals. In: Karr, C. (Ed.), Infrared and Raman
Spectroscopy of Lunar and Terrestrial Minerals. Academic Press, New York, pp.
91-116.
Hunt, G.R., Salisbury, J.W., 1970. Visible and near-infrared spectra of minerals and rocks:
I. Silicate minerals. Modern. Geol. 1, 283-300.
McCord, T.B., Clark, R.N., Hawke, B.R., McFadden, L.A., Owensby, P.D., Pieters, C.M.,
Adams, J.B., 1981. Moon: near-infrared spectral reflectance, a first good look. J. Geophys.
Res. 86, 10883-10892.
Rossman, G.R., 1980. Pyroxene spectroscopy. Rev. Miner. 7, 93-116.
Shkuratov, Yu. G., Kaydash, V. G. and Pieters C. M., 2005. Lunar Clinopyroxene and
Plagioclase: Surface Distribution and Composition, Solar System Research, Vol. 39, No. 4,
pp. 255–266. |
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