期刊
SEDIMENTARY GEOLOGY
卷 375, 期 -, 页码 27-35出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sedgeo.2018.03.010
关键词
Method development; Quartz; K-feldspar; lllite; Plagioclase; Smectite; Calcite; Provenance study
类别
资金
- Bundesministerium fur Bildung und Forschung (BMBF, Bonn, Germany) within the project Regional Archives for Integrated Investigation (RAiN) [03G0862A]
- MARUM
- AWI
In paleoenvironmental studies, the mineralogical composition of sediments is an important indicator. In combination with other indicators, they contribute to the understanding of changes in sediment sourcing as well as in weathering and depositional processes. Fourier transform infrared spectroscopy (FTIRS) spectra contain information on mineralogical composition because each mineral has a unique absorption pattern in the mid-IR range. Although easily obtained, FTIR spectra are often too complex to infer mineral concentrations directly. In this study, we use a calibration set of ca. 200 sediment samples conventionally measured using X-ray diffraction (XRD) in order to develop multivariate, partial least squares (PLS) regression models relating mineral contents to sediment spectra. Good correlations were obtained for the most common minerals (e.g. quartz, K-feldspar, illite, plagio-clase, smectite, calcite). Correlation coefficients ranged from 0.85 to 0.92, coefficients for the validation varied from 0.64 to 0.80, the number of latent variables (PLS regression components) in the models ranged between 3 and 7 and the range of variation of the RMSEcv gradient was from 15.28 to 5.7. (C) 2018 Elsevier B.V. All rights reserved.
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