Reflectance spectra of synthetic Fe-free ortho- and clinoenstatites in the UV/VIS/IR and implications for remote sensing detection of Fe-free pyroxenes on planetary surfaces
- Both enstatite spectra are very bright in the VIS and NIR and show almost neutral to slightly bluish spectral slopes with a steep absorption in the UV. Very low iron in the enstatites (below similar to 0.04 wt% FeO) already results in weak albeit noticeable absorptions in the VNIR between 0.4 and 0.9 mu m. Orthoenstatite and clinoenstatite are not distinguishable based only on their spectra in the VIS and NIR. At the Reststrahlen bands in the MIR a systematic difference in the number and exact position of local minima at similar to 10 mu m between clinoenstatite and orthoenstatite is evident. This can be used to discern between the polymorphs in this wavelength range. Additionally, we can distinguish between Fe-free low- and high-Ca pyroxenes in the MIR.
| Author details: | Kathrin Markus, Lyuba Moroz, Gabriele ArnoldGND, Daniela Henckel, Harald HiesingerGND, Arno RohrbachGND, Stephan Klemme |
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| DOI: | https://doi.org/10.1016/j.pss.2018.04.006 |
| ISSN: | 0032-0633 |
| Title of parent work (English): | Planetary and space science |
| Publisher: | Elsevier |
| Place of publishing: | Oxford |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2018/09/15 |
| Publication year: | 2018 |
| Release date: | 2021/09/29 |
| Tag: | Analog material; Enstatite; Reflectance spectroscopy; Remote sensing; Synthetic pyroxene |
| Volume: | 159 |
| Number of pages: | 13 |
| First page: | 43 |
| Last Page: | 55 |
| Funding institution: | DLR grantHelmholtz AssociationGerman Aerospace Centre (DLR) [D/957/67229379]; DFG grantGerman Research Foundation (DFG) [MO 3007/1-1] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
| Peer review: | Referiert |
| Publishing method: | Open Access / Green Open-Access |
