This resource estimation is different from the traditional "geological block method" and "profile method" based on grade model. The concrete principle can be described as follows: firstly, the ore body is divided into countless blocks with the same size, and each block has three-dimensional coordinates representing its spatial position, which is the empty block model; Then, according to the grade of the known sampling points in the model, spatial interpolation is carried out by a specific mathematical method, so that each block has a grade value, and finally the grade model of the ore body is generated, thereby estimating the reserves of the ore body. See Table 8-2 for the current industrial indexes of BeO and Li2O.

Table 8-2 Industrial Indicators of BeO and Li2O

Proven internal economic resources, namely type 33 1: refers to the section where the exploration degree has reached the requirements of the exploration stage and the geological reliability has been proved, but the feasibility study or pre-feasibility study has not been carried out, and only a rough study has been carried out, and the economic significance is within the economic-sub-marginal economic range, and the calculated resources are highly reliable and the feasibility evaluation results are low.

The controlled internal economic resources, namely Class 332, refer to the areas where the exploration degree has reached the requirements of detailed investigation stage, the geological reliability is controlled, the feasibility evaluation has only been roughly studied, the economic significance is within the economic-sub-marginal economic range, the calculation resources are highly reliable and the feasibility evaluation is low.

The inferred intrinsic economic resources, namely Type 333, refer to the section where the exploration work only meets the requirements of the prospecting stage. The geological reliability is inferred, and the resources are calculated only based on limited data, which has low reliability. Feasibility evaluation is only studied briefly, and its economic significance is within the scope of economics-sub-marginal economics, so its credibility is low.

This resource estimation mainly counts the contents of BeO and Li2O in the unit blocks of the model area. According to the classification standard of mineral resources/reserves in the Code for Geological Exploration of Rare Metal Minerals (DZ/T0203-2002), combined with the actual situation of Keketuohai mining area, we collectively call it 331-333 resources.