# Optimized Weighted Ensemble Approach for Enhancing Gold Mineralization Prediction
## 3 Results and Discussion
### Exploratory Analysis of the Data
#### 3.2.4 The Lithological Analysis  
The non-stationarity of gold grade in the deposit refers to the fact that the distribution of gold grades within the deposit is not constant or uniform. Instead, it varies geographically and is affected by many geological features, including lithology, structure, alteration, and mineralization type.  
In geology, it is common practice to group similar lithologies to simplify the categorization and interpretation of geological data. Reducing the number of rock types to six (VQ: Quartz vein, SD: Sedimentary rocks, GD: Granodiorite, GBD: Gabbro Diorite, DI: Diorite, and AN: Andesite) created a more manageable set of categories that can be used to understand the geological distribution in a more general way and to help predict gold content.  
The categorization of rocks based on their genetic category, structure, composition, and grain size is known as rock type [58].  
The data in Table 3 and Figure 4 suggest that the area under investigation has a wide range of gold contents across the various rock types. This study identifies six distinct rock types, namely VQ, SD, GD, GBD, DI, and AN, corresponding sample sizes of 392, 1742, 10,733, 10,004, 4967, and 5142, respectively.  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**N** & **Min** & **Max** & **Mean** & **Variance** & **S.D.** & **CoV** & **Skewness** & **Kurtosis** \\ \hline
32980 & 0.005 & 10 & 0.18 & 0.43 & 0.69 & 3.72 & 8.9 & 99.87 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Summaries composing data on the gold concentration in the area under study.  
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline
**Variable** & **N** & **Mean** & **SD** & **Variance** & **Min** & **Q1** & **Median** & **Q3** & **Max** & **Skewness** & **Kurtosis** \\ \hline VQ & 392 & 0.76 & 1.75 & 3.06 & 0.005 & 0.01 & 0.03 & 0.55 & 10 & 3.26 & 11.2 \\ SD & 1742 & 0.08 & 0.34 & 0.12 & 0.005 & 0.005 & 0.01 & 0.03 & 5.5 & 10.80 & 143.4 \\ GD & 10,733 & 0.2 & 0.67 & 0.45 & 0.005 & 0.01 &The VQ rock type has the highest average gold content, with a mean of 0.76 and a maximum of 10. This highlights that VQ is a significant lithology for gold mineralization in the region. SD and AN have the lowest average gold concentrations, with mean values of 0.08 and 0.13, respectively, and maximum values of 5.5 and 10. GD, GBD, and DI rock types exhibit moderate mean gold concentrations, varying between 0.13 and 0.21.  
The presented data indicate significant variability in the distribution of gold concentration across different rock types, with standard deviations from 0.34 to 1.75. This indicates that gold mineralization may be affected by various geological factors, including lithology, structure, and alteration. According to the skewness and kurtosis values for each kind of rock, the distribution of gold content is not normally distributed and might be affected by outliers or non-linear correlations.  
The data presented in this study can be used to analyze patterns and trends in the distribution of gold within different rock types. This can provide a valuable overview of the gold concentration in the region. However, further investigation is required to fully understand the geological constraints on gold mineralization and give a complete picture of the distribution of gold in the area.