Small Particles and Cemented Textures: Two Challenges for Remote Compositional Analysis

Details Small Particles and Cemented Textures: Two Challenges for Remote Compositional Analysis Small Particles and Cemented Textures: Two Challenges for Remote Compositional Analysis

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002assl..278...51m&link_type=abstract

Solar System Remote Sensing, p. 51

Physics

Optics

Radiative Transfer, Geometrical Optics, Mineral Deposits, Reflectance, Cementation, Particulates, Remote Sensing, Optical Measurement

Scientific paper

Hapke's radiative transfer model for particulate surfaces has been demonstrated to be accurate for describing the reflectance of surfaces where the particles are larger than the wavelength of light (geometric optics regime). However, for particles that are smaller than the wavelength of light, the behavior of radiation in a particulate surface is different and not well described by geometric optics. Combining Mie and Hapke theories has been shown as a potentially promising avenue in modeling the reflectance of fine particle surfaces through these studies have also shown that important discrepancies between models and observations exist. Another important area of basic remote sensing research is in the changes that occur in reflectance due to cementation. Processes that occur in soils can lead to cementation of particulates such as the formation of caliche or hardpans, or in the case of evaporite basins. Observations of the reflectance of particulate and cemented materials show that the change due to cementation are systematic and distinct from compaction or other effects, but have not been modeled. Here I describe experimental observations and modeling of these two cases (fine particles and cementation) and discuss possible paths to resolve these problems.

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