Spectral reflectance of-carbonate minerals in the visible and near infrared (0.35-2.55 microns): calcite, aragonite, and dolomite
Spectral reflectance of-carbonate minerals in the visible and near infrared (0.35-2.55 microns): calcite, aragonite, and dolomite
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碳酸盐矿物在可见光和近红外（0.35-2.55微米）的光谱反射率：方解石、霰石和白云石
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
SuseN J. Ger
中科院分区：
文献类型：
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作者：
SuseN J. Ger
摘要 光谱的可见光和近红外部分（0.35 至 2.55 pm）的光谱反射率提供了一种快速、廉价、非破坏性的技术，用于确定矿物学并提供有关难以区分的碳酸盐矿物的微量元素化学的一些信息。它可以一步提供以前只能通过两种或多种技术的组合应用才能获得的信息，并且可以为碳酸盐研究的现有矿物学和岩相学方法提供有用的补充。由于碳酸根离子的振动过程，方解石、文石和白云石在 1.60 至 2.55 pm 区域均具有至少 7 个吸收特征。这些带的位置和宽度可用于矿物学诊断，并且可用于识别这三种常见矿物，即使由于流体包裹体中存在少量水而导致的吸收带在下午 1.9 点附近出现。方解石和白云石光谱中 1.2 pm 附近的宽双谱带表明存在 Fe2+。这些带的形状和位置（如果存在）可以帮助识别方解石和白云石。光谱可以从任何形式的样品中获得，包括粉末、沙子以及破碎、锯切或抛光的岩石表面。
Abshact Spectral reflectance in the visible and near infrared portion of the spectrum (0.35 to 2.55 pm) offers a rapid, inexpensive, non-destructive technique for determining mineralogy and providing some information on the minor element chemistry of the hard-to-discriminate carbonate minerals. It can, in one step, provide information previously obtainable only by the combined application of two or more techniques, and can provide a useful complement to existing mineralogical and petrographic methods for study of carbonates. Calcite, aragonite, and dolomite all have at least 7 absorption features in the 1.60 to 2.55 pm region due to vibrational processes of the carbonate ion. Positions and widths of these bands are diagnostic of mineralogy and can be used to identify these three common minerals even when an absorption band due to small amounts of water present in fluid inclusions masks features near 1.9 pm. Broad double bands near 1.2 pm in calcite and dolomite spectra indicate the presence ofFe2+. The shapes and positions ofthese bands, ifpresent, can aid in identification of calcites and dolomites. Spectra may be obtained from samples in any form, including powders, sands, and broken, sawed, or polished rock surfaces.