Relation of the spectroscopic reflectance of olivine to mineral chemistry and some remote sensing implications
Relation of the spectroscopic reflectance of olivine to mineral chemistry and some remote sensing implications
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橄榄石光谱反射率与矿物化学的关系及一些遥感意义
DOI：
10.1029/jb092ib11p11457
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发表时间：
1987
影响因子：
--
通讯作者：
W. Ridley
中科院分区：
文献类型：
--
作者：
T. King;W. Ridley
使用高分辨率的可见光和近红外漫反射光谱，我们已经系统地研究了明显的波长偏移作为矿物化学的功能在Fe/Mg橄榄石系列从Fo 11到Fo 91。该研究还表明，在橄榄石结构中可以通过光谱检测到痕量的镍。我们发现，只有在相对较高的分辨率，才能提取重要的成分信息，因为橄榄石的整体光谱特性的变化只是微妙的Fe/Mg比的函数。显着的光谱变化作为粒度的函数也被证明，增加了进一步的复杂性，从富含橄榄石的表面遥感数据的解释。预计这项实验室研究将有助于解释来自地球和地球外天体的遥感数据。陆地应用可能包括识别超镁铁质、超基性岩和玄武岩地形，这些地形本身可能具有矿产潜力。在地外应用中，如果仪器能够提供必要的波长覆盖范围、分辨率和信噪比，以便光谱可以与这里讨论的实验室数据进行比较，那么小行星显然是进一步检查的候选者。讨论了橄榄石中Fe-Mg-Ni关系的一些排列，因为它们适用于解释小行星表面和其他地外天体。
Using high-resolution visible and near-infrared diffuse spectral reflectance, we have systematically investigated apparent wavelength shifts as a function of mineral chemistry in the Fe/Mg olivine series from Fo11 to Fo91. The study also shows that trace amounts of nickel can be spectrally detected in the olivine structure. We show that significant compositional information can only be extracted at relatively high resolution, because the overall spectral characteristics of the olivines change only subtly as a function of the Fe/Mg ratio. Significant spectral variation as a function of grain size is also demonstrated, adding a further complication to the interpretation of remotely sensed data from olivine-rich surfaces. This laboratory study is expected to aid in the interpretation of remotely sensed data from both terrestrial and extraterrestrial bodies. Terrestrial applications may include the recognition of ultramafic, ultrabasic, and basaltic terrains which in themselves may have mineral potential. Among extraterrestrial applications, the asteroids are obvious candidates for further examination if instrumentation can provide the necessary wavelength coverage, resolution, and signal-to-noise ratio so that spectra can be compared to those laboratory data discussed here. Some permutations of Fe-Mg-Ni relations in olivines are discussed as they apply to the interpretation of asteroid surfaces and other extraterrestrial bodies.