Soil Geochemical Characteristics And Prospecting Direction Of Copper Polymetallic Mine Area In Laba-Donglufang, Zhongdian

Laba-Donglufang area is located in Zhongdian County, the northwest of Yunnan Province. Yangtz platform, Dege-Zhongdian block, Garze-Litang junction zone. Due to the effect of tectonic movements and multi-stage magmatic evolution, this area has formed a enriched zone of Pb, Zn, Ag, Au, Cu, Fe and other metal elements. This enriched zone mainly distributed along the Lijiang platform margin boundary fracture. Different metallogenic environment and metallogenic mechanism makes different Cu polymetallic deposit types.According to the analysis of soil geochemistry, and Mathematical Geology Methods, exploration of the relationship and distribution of different mineralized elements makes geological significance to find Cu polymetallic deposits. Based on the analysis of Geological, geophysical, geochemical and mine production, the1:50000soil geochemical survey of Yunnan Shangri-La Laba-Donglufang area has been lauched. Taking mathematical geology statistical method as the guiding ideology, we analysed the data of sampled items, obtained the following knowledge and results.1. Period of magmatic activity in Shangri-La Laba-Donglufang mining area, contains Variscan, Indosinian and Himalayan. Himalayan is the most active one.It is shallow-super shallow acidic-based hybrid porphyry belt, expanding as two nearly north-south strip.2. Collected4274samples, analyzed2137samples, analyze Cu, Pb, Zn, Ag, Au, W, Mo, these seven elements. Cu, Au, Pb, Zn, Ag elements represent the combination of secondary enrichment of the main ore-forming elements.3. Element content-logarithmic frequency histogram shows that distribution patterns of Cu, Au, Pb, Zn, Ag elements, lean right to high levels of value area, with wide distribution, high dispersion. This shows that these elements contribute to the secondary enrichment and halo effect. Concentration of copper is significantly higher than crustal abundance, thus indicating enrichment of copper area for the formation of copper deposits having a good geochemical conditions.4. According to comprehensive geological and geochemical data analysis, we can delineate the two key exceptions block from south to north-Laba and Donglufang mining area, projecting verificate target in the future.