Characterization and comparison of structural and compositional features of planetary quadrilateral pyroxenes by Raman spectroscopy
-
Alian Wang
,
Brad L. Jolliff
Abstract
This study reports the use of Raman spectral features to characterize the structural and compositional characteristics of different types of pyroxene from rocks as might be carried out using a portable field spectrometer or by planetary on-surface exploration. Samples studied include lunar rocks, martian meteorites, and terrestrial rocks. The major structural types of quadrilateral pyroxene can be identified using their Raman spectral pattern and peak positions. Values of Mg/(Mg + Fe + Ca) of pyroxene in the (Mg, Fe, Ca) quadrilateral can be determined within an accuracy of ± 0.1. The precision for Ca/(Mg + Fe + Ca) values derived from Raman data is about the same, except that corrections must be made for very low-Ca and very high-Ca samples. Pyroxenes from basalts can be distinguished from those in plutonic equivalents from the distribution of their Mg′ [Mg/(Mg + Fe)] and Wo values, and this can be readily done using point-counting Raman measurements on unprepared rock samples. The correlation of Raman peak positions and spectral pattern provides criteria to distinguish pyroxenes with high proportions of non-quadrilateral components from (Mg, Fe, Ca) quadrilateral pyroxenes.
© 2015 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Calcite inclusions in forsterite
- The induced thermoluminescence and thermal history of plagioclase feldspars
- Characterization and comparison of structural and compositional features of planetary quadrilateral pyroxenes by Raman spectroscopy
- A P21/c-C2/c high-pressure phase transition in Ca0.5Mg1.5Si2O6 clinopyroxene
- Energy-filtered transmission electron microscopy (EFTEM) of intergrown pyroxenes
- TEM analysis of microbial mediated sedimentation and lithification in modern marine stromatolites
- Mineralogy of a natural As-rich hydrous ferric oxide coprecipitate formed by mixing of hydrothermal fluid and seawater: Implications regarding surface complexation and color banding in ferrihydrite deposits
- A C/MoS2 mixed-layer phase (MoSC) occurring in metalliferous black shales from southern China, and new data on jordisite
- Step edges on galena (100): Probing the basis for defect driven surface reactivity at the atomic scale
- Solubility study of Ti,Zr-based ceramics designed to immobilize long-lived radionuclides
- Characterization of synthetic Cs-Li cancrinite grown in a butanediol-water system: An NMR spectroscopic and Rietveld refinement study
- Optical spectra of Co2+ in three synthetic silicate minerals
- Spectroscopic standards for four- and fivefold-coordinated Fe2+ in oxygen-based minerals
- Hydrous species in crystalline and metamict titanites
- First principles study of water adsorption on the (100) surface of zircon: Implications for zircon dissolution
- A molecular dynamics study of the glass transition in CaAl2Si2O8: Thermodynamics and tracer diffusion
- The crystal structure of aravaipaite
- Letter. Feldspar thermometry in ultrahigh-temperature metamorphic rocks: Evidence of crustal metamorphism attaining ~1100 °C in the Archean Napier Complex, East Antarctica
