## 4 Results
### Spectral  
To gauge the potential differences in the spectra associated with a given element, validation dataset four was used to retrieve the spectra corresponding to each of the eight geochemical parameters being at their maximum values. These spectra are shown in Figure 1 where the parameter and value of the maximum for the spectral sample is provided in the legend. To distinguish between the absorptions more easily across the 400-25,000 nm spectral range two separate plots are shown. The upper plot covers the 400-6000 nm and the lower plot the 6000-25,000 nm spectral region. These spectra are not presented to provide an in-depth analysis of the full suite of potential minerals that might be encountered but rather to ascertain if the mineral types are at least consistent with what might be observed when the given geochemical parameter is at a maximum. Complementary to Figure 1 is Table 2 which provides a summary of some of the major absorption/emission features of minerals present in the study area. It is noted that respective absorption bands can be present in minerals that are not listed in table. The lower and upper wavelength positions are only given for absorption bands where related compositional changes occur otherwise, an estimated central location is provided. Figure 1: Indicative spectra selected from dataset four corresponding to the maximum value of a given geochemical parameters. The spectra are indicators only of the potential differences in reflectance that might be associated with a given parameter. It is expected, and confirmed, that certain whole-rock parameters will be consistent with given mineral assemblages. Complementary to this figure is Table 2 which provides a summary of some of the major absorption/emission features of minerals present in the study area and noted within the spectra. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Label** & **Dominant Mineral Group Component/Group** & **Assignment** & **Literature** & **nm/cm\({}^{-1}\)** \\ \hline A & iron oxide/Hematite & Fe\({}^{3+}\) CFA (\({}^{6}\)A\({}_{1}>\) \({}^{4}\)T\({}_{1}\)) & [39] & 877/11,403 \\ \hline B & kaolin group/Kaolin & \(\
u+\delta\)Al\({}_{2}\)OH\({}_{1}\) & [40] & 2209/4527 \\ \hline C & kaolin group/Kaolin & \(\
u\)Al2 OH\({}_{0}\) & [40] & 2705/3697 \\ \hline D & kaolin group/Kaolin & \(\
u\)Al2 OH\({}_{1}\) & [40] & 2761/3622 \\ \hline E & Mg-rich Calcium carbonate/Dolomite & 3v3 CO\({}_{3}\) & [41] & 2312–2323/4325–4305 \\ \hline F & Calcium carbonate/Calcite & 3v3 CO\({}_{3}\) & [41] & 2340/4237 \\ \hline G & Mg-rich Calcium carbonate/Dolomite & 2v3 + v1 & [41] & 2505–2518/3992–3971 \\ \hline H & Calcium carbonate/Calcite & 2v3 + v1 & [41] & 2530–2541/3953–3935 \\ \hline I & Mg-rich Calcium carbonate/Magnesite & \({}^{\rm w}\)v3 peak\({}^{\prime}\) CO\({}_{3}\) & [7] & 6405/1561 \\ \hline J & Calcium carbonate/Dolomite & \({}^{\rm w}\)v3 peak\({}^{\prime}\) CO\({}_{3}\) & [7] & 6490/1541 \\ \hline K & Quartz/Quartz & \(\
u\)(Si-O-Si) & [42] & 8150/1227 \\ \hline L & quartz/Quartz & \(\
u\)(Si-O-Si) & [42] & 8598/1163 \\ M & Quartz/Vitreous Silica & \(\
u\)(Si-O-Si) & [43] & 9025/1108 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: A summary of some of the major absorption/emission features of minerals present in the study area. It is noted that respective absorption bands can be present in minerals that are not listed in table. The lower and upper wavelength positions are only given for absorption bands where related compositional changes occur otherwise, an estimated central location is provided. In Figure 1 the spectra named Fe, Al\({}_{2}\)O\({}_{3}\) and TiO\({}_{2}\) display iron oxide absorptions that are characterized by crystal field interactions around 900 nm [46; 47] and are indicative of hematite and goethite.