RESEARCH WAY OF TIME SPECTRUM OF MINERAL DEPOSITS WITH GIS

The time spectrum of mineral deposits shows the diversity of mineralization. Former researchers have studied it by way of ore deposit, geochemistry and statistics on a scale of globe, region and mineral deposits. By studying this spectrum of multiple ore kinds in Lancangjiang River region, Yunnan Province, this paper discusses the methods to establish the time spectrum of mineral deposits of multiple ore kinds and single ore kind — lead-zinc deposits using geographic information system (GIS). The ore-forming scope index and the ore-forming intensity index are the main parameters with the GIS analysis as the tool. While the division of this kind of spectrum is based on the curves of the ore-forming scope and the ore-forming intensity. The authors emphasize the necessity to combine qualitative ore-forming analysis with quantitative GIS methods, and point out the inherent relation between the time spectrum and the spatial spectrum of mineral deposits.