| Northern three-river metallogenic belt is one of the most important nor-ferrous metal metallogenic belts in our country. Reserves of Cu, Pb, Zn, Ag are very large. The area locates in arc bend of Himalayan Tectonic Region, and is of unique tectonic character. Study on metallogenic regularity of the area is not only valuable on economy, but also on metallogeny theory. With an abundance of new technology and theories coming forth continuously at present, metallogeny tends to be systematized, intelligentized, and integeated with informatics more tightly. This thesis discusses metallogenic regularity of the area detailly on the platform of GIS by using GIS technology and analying all kinds of geology materials synthetically.The thesis introduces regional basic geology and mineral geology of the area at first, then builds full GIS database of northern three-river area, and singles out geochemical anomalies by development on MAPGIS, and finally studies intensively the metallogenic regularity using GIS spatial analysis, fractal theory, etc. The result shows:1. Obscure information can be revealed in studying on metallogenic regularity by applying apporiate mathematic models.2. There are two sets of elements geochemical anomalies: one extends NW, and is controlled by regional faults; the other extends NE, and intersects with the former taking on "V" form, and is important to mineral exploration.3. Almost all Au deposits are situated in greenstone belt of tectonic sutures.4. Dege-Xiangcheng metallogenic belt are formed in stretching vocalnic island arc, and the ore-foming process is related with vocalnic-sedimenting tightly.5. Yulong-Mangkang and Leiwuqi-Zuogong metallogenic belts are formed in collision-orogeny circumstance, and the ore-forming process is related with lava-thermal fluid tightly.6. Triassic strata hold effect on ore forming of the whole area, and can supply some ore-forming substance for deposits there.
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