We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Deconvolution of distinct lithology chemistry through oversampling with the Mars Science Laboratory Alpha Particle X-Ray Spectrometer.
- Authors
VanBommel, Scott J.; Gellert, Ralf; Berger, Jeff A.; Campbell, John L.; Thompson, Lucy M.; Edgett, Kenneth S.; McBride, Marie J.; Minitti, Michelle E.; Pradler, Irina; Boyd, Nicholas I.
- Abstract
The Alpha Particle X-Ray Spectrometer (APXS) determines the chemical composition of Martian rocks and soils on-board both active Aeronautics and Space (NASA) rovers using X-ray emission spectroscopy through complementary particle-induced X-ray emission (PIXE) and X-ray fluorescence (XRF) excitation methods. A single APXS spectrum represents the sum of the signals from within the instrument's field of view (FOV). In the past, features smaller than the FOV have been investigated through repeated measurements with stepwise lateral offsets. These lateral offsets allow for empirically extracting, through elemental correlations, distinct compositions of different features. Here, we present a novel analytical method for deconvolving the endmember chemistry of visually distinct components through oversampling and the integrated analysis of the elemental data and supporting images. We discuss specifically the method's application to three targets investigated by the Mars Science Laboratory rover Curiosity during its traverse, as well as the added information that can be gained from this method in the future. Copyright © 2016 John Wiley & Sons, Ltd.
- Subjects
PETROLOGY; X-ray spectrometers; MARS surface samples; X-ray emission spectroscopy; MARTIAN geology; DECONVOLUTION (Mathematics); SPECTRUM analysis
- Publication
XRS: X-ray Spectrometry, 2016, Vol 45, Issue 3, p155
- ISSN
0049-8246
- Publication type
Article
- DOI
10.1002/xrs.2681