Abstract: In order to evaluate the uncovered goldbearing structures, a new geochemical evaluation program, which consists of lengthwise sampling distribution and corresponding classification for data interpretation, is suggested. Replacing usual sampling distribution with new one，more economic results can be obtained by less cost,and 84 goldbearing structures have been found by 2 439 samples in Pingdu area. With corresponding classification, the usual methods are inherited and modified, the key information in data can be exposed more effectively based on simpler steps and single graph. According to this graph, the deferent types of element combinations, types of geochemical units, the equidistantness and zoning of units, a variety of geochemical characteristics of known mine units and the target districts etc., are all presented in Jishan area. Especially a typical geochemical zoning sequence is shown in it. The corresponding classification discussed here can also be applied to other subjects. In brief, this program possesses the nature of optimization to certain degree.

Key words: geochemistry, structure, gold deposit, classification, correspondence cluster analysis