Jehlicka J, Vítek P, Edwards H G M, Heagraves M, Capoun T
Charles University, Institute of Geochemistry, Mineralogy and Mineral Resources, Prague, Czech Republic.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Aug;73(3):410-9. doi: 10.1016/j.saa.2008.09.004. Epub 2008 Sep 23.
Raman spectral signatures have been obtained in situ for a series of minerals using portable Raman instruments. Cerussite, anglesite, wulfenite, titanite, calcite, tremolite, andradite and quartz were detected using portable Raman spectrometer First Defender XL (Ahura). Baryte, almandine and realgar Raman spectra obtained by this instrument in the field were compared to the data measured by the other mobile Raman instrument Inspector Raman (DeltaNu). Bench Raman dispersive microspectrometer (InVia Reflex, Renishaw) was used for comparative purposes. All spectra were obtained using a 785nm diode excitation. Although displaying lower spectral resolution comparing with the laboratory confocal instrument both portable instruments permit unambiguous detection of minerals in the field. These possibilities designate portable Raman machines as excellent tools for field geological applications. Miniaturised Raman instrument combined with LIBS will be included in the payload of the EXO Mars mission and would open interesting research possibilities in other in situ field planetary studies.
利用便携式拉曼仪器原位获取了一系列矿物的拉曼光谱特征。使用便携式拉曼光谱仪First Defender XL（阿胡拉公司）检测了白铅矿、铅矾、钼铅矿、榍石、方解石、透闪石、钙铁榴石和石英。将该仪器在野外获得的重晶石、铁铝榴石和雄黄的拉曼光谱与另一台便携式拉曼仪器Inspector Raman（DeltaNu公司）测量的数据进行了比较。使用台式拉曼色散显微光谱仪（InVia Reflex，雷尼绍公司）作为对比。所有光谱均使用785nm二极管激发获得。尽管与实验室共焦仪器相比，这两台便携式仪器的光谱分辨率较低，但它们都能在野外明确检测出矿物。这些特性表明便携式拉曼仪器是野外地质应用的优秀工具。小型化拉曼仪器与激光诱导击穿光谱仪相结合将被纳入Exo火星任务的有效载荷中，这将为其他原位野外行星研究开启有趣的研究可能性。
