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Abstracts Submitted to GeoRaman 2014 Not Published in Program

The following abstracts were not submitted in time to be published as part of the proceedings:

Title: RLS Instrument Radiometric Model: Instrument performance theoretical evaluation and experimental checks
G. Ramos, A. Moral, J. A. Rodriguez, C. Perez, C. Diaz, I. Hutchinson, R. Ingley, F. Rull

Summary :
Raman Laser Spectrometer (RLS) is one of the Pasteur payload instruments located at the Rover of the ExoMars mission and within the ESA’s Aurora Exploration Programme. RLS will explore the Mars surface composition through the Raman spectroscopy technique. The instrument is divided into several units: a laser for Raman emission stimulation, an internal optical head (iOH) for sample excitation and for Raman emission recovering, a spectrometer with a CCD [2] located at its output (SPU), the optical harness (OH) for the units connection, from the laser to the excitation path of the iOH and from the iOH reception path to the spectrometer, and the corresponding electronics for the CCD operation. Due to the variability of the samples to be analyzed on Mars, a radiometry prediction for the instrument performance results to be of the critical importance. In such a framework, and taking into account the SNR (signal to noise ratio) required for the achievement of successful results from the scientific point of view (a proper information about the Mars surface composition), a radiometric model has been developed to provide the requirements for the different units, i.e. the laser irradiance, the iOH, OH, and SPU throughputs, and the samples that will be possible to be analyzed in terms of its Raman emission and the relationship of the Raman signal with respect to fluorescence emission, among others. The radiometric model fundamentals (calculations and approximations), as well as the first results obtained during the bread board characterization campaign are here reported on.

Abstract


Title: Micro-Raman Spectroscopy of Estherville Mesosiderite
M. Szurgot, R. Kisiel, K Kisiel

Summary :
Identification of minerals in Estherville mesosideride has been conducted by Raman spectroscopy. Orthopyroxene, anorthite, olivine and whitlockite have been detected and characterized.

Abstract


Title: Detecting Reduced Carbon on Mars Using RLS: Raman Spectroscopy of Mars Analogues in Preparation for ExoMars
L. V. Harris, M. McHugh, I. B. Hutchinson, R. Ingley, J. Parnell, H. G. M. Edwards

Summary :
This poster reviews work on Raman spectroscopy of reduced carbon in preparation for ExoMars and presents analysis of a new Mars analogue which demonstrates how the environment can alter the Raman spectrum of carbon and how this affects its analysis.

Abstract


Title: Carbon-bearing Materials on Earth, the Moon, Mars and Asteroids by Micro-Raman Method
Y. Miura

Summary :
Gem-crystals of diamonds of carbon-bearing materials can be also related with shallow carbon sources of carbonatite (or calcite) by reaction within ring dikes, where are compared with artificial impacts, meteorites of the Moon, Mars and Asteroids and volcanic breccias of Arkansas (U.S.A.) diamonds. Localized carbon-bearing breccias at the interior triggered initially by shock wave process can be formed at shallow sites during long geological history, which might be applied to terrestrial and extraterrestrial fields.

Abstract


Title: Identifying Fossil Kerogen in Sedimentary Rocks Using Raman Spectroscopy
S Shkolyar, J. D. Farmer, J. Blacksberg

Summary :
Reliable identification of kerogen as a biosignature in Mars analog samples is often complicated by high background fluorescence from both kerogen and mineral matrixes. This study recommends: (1) continued research on time-resolved Raman techniques for reducing fluorescence in high-priority Mars lithologies and (2) following a science-driven approach to understand sample-dependent issues in Raman applications for Mars exploration.

Abstract