On the material of the thoroughly studied Deputatskoye tin ore deposit (Yakutia) the research aimed at revealing the possibility of describing the structure of the deposit by a deterministic fractal model has been carried out. The essence of the study is the search for a function mapping a large structure to its part. The properties of such a mapping were checked by dividing the investigated area into M x N equal-sized elements (cells), and M and N were taken equal to 8,16,32,64,128. In each cell, the average tin reserves in metric percent were calculated and the similarity between the reference (8 x 8 cell) and the object as a whole was assessed, taking into account the possible rotation of small-sized structures relative to large ones. It was found that the maximum number of cells similar to the etalon is revealed when using the 64 x 64 network, and the 64 x 128 network identifies as "etalon-like" the most morphologically complex nodes that are most enriched in tin.