Sequential indicator conditional simulation and indicator kriging applied to discrimination of dolomitization in GER 63 - channel imaging spectrometer data

摘要: Laboratory reflectance spectra of synthetic mixtures the carbonate minerals calcite and dolomite were measured in visible near-infrared wavelength region (0.4–2.5 μm) using a high-spectral resolution laboratory spectrometer. The instrument reflectivity with an accuracy 0.001 μm, allowing detailed spectrum. could be characterized by presence strong absorption band centered at 2.3465 μm for pure 2.3039 dolomite. Nine intermediate composition analyzed demonstrating that position is semilinearly related to content sample. Theoretically, this model allows mapping dolomitization from remotely sensed imagery, GER 63-channel imaging spectrometer data southern Spain used attempt such mapping. First, pixels vegetation removed. For remaining pixels, center was detected converted category fraction. percentage estimated direct indicator kriging (IK) sequential conditional simulation, assuming represented as variable (SCIS variable) continuous variable). Four realizations SCIS (category showed on average, 60 percent simulated same class over 90 within one difference. A comparison field samples IK estimates 20 accurate. (continuous does not perform well differences between −45% +26% calcite; however, simulation reproduces spatial variability better.