X-ray Fluorescence Spectrometry with the SELENE Orbiter

Details X-ray Fluorescence Spectrometry with the SELENE Orbiter X-ray Fluorescence Spectrometry with the SELENE Orbiter

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..23.1833o&link_type=abstract

Advances in Space Research, Volume 23, Issue 11, p. 1833-1836.

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X-ray fluorescence spectrometry of the Moon using a CCD-based instrument ``XRS'' is planned with the SELENE (Selenological and Engineering Explorer) orbiter, which will be launched in 2003. In the Apollo 15 and 16 missions, elemental mapping of Mg, Al and Si has been performed at the lunar equatorial regions for only 9% of the total surface. Much improved datasets will be obtained by using the XRS to map most of major elements, for 90 % coverage of the total surface, and within 20 km spatial resolution. Key scientific objectives are (a) to measure the global average of lunar surface composition for investigation of the overall properties of lunar crust, (b) to map the rock-type distribution to study the formation and evolution of the crust and the maria, and to speculate the origin of the dichotomy, (c) to survey the chemical pattern of lava flows, or bottoms of craters or basins, for surveying the vertical structure and composition of the lunar crust and mantle. We describe the XRS instrument.

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