Study On Distribution Regularities Of Germanium And Silver And Mineral Geochemistry In The Fulechang Pb-Zn Deposit, Northeast Yunnan

The Fulechang deposit,it is one of the typical ore deposit, in the Sichuan-Yunnan-Guizhou carbonate-hosted Lead-Zind metallogenic area, Through the ore, chemical analysis, isotope geochemistry, detailed analysis mineral spectrum, the main mineral composition, the main trace elements, rare earth elements and isotope composition of different colors sphalerite mode of occurrence are discussed germanium and silver and rich set of laws and the significance of mineral geochemical tracing. The main understanding obtained as follows:1、Quantitative study on the color of sphalerite infrared spectral characteristics, content of Sphalerite in trace elements Li, Be, Sc, Y, In, Cs, Bi, Rb, Sr, Mo, Ni, Ba, V, Co, Cu, Sb, Cr content in high levels of light transmission wavenumber range in low light than the wavenumber range of high, but Cd, Ga opposite. Cu element content positively correlated with Sb, Cd was, Co and Cu were negatively correlated. Cd, Ga, Cu, Sc, Y, In, Cs, Mo, Co enrichment in sphalerite relatively high, Li, V, Cr, Ni, Rb, Sr, Be enrichment in pyrite relatively high, Sb, Bi relative enrichment in galena; rare earth elements content in high transmittance wavenumber region than in the low light wave number region content high about as ranging from 1.5-6 times.2、In sphalerite, Cd mineralization in the early stage to quality same as enrichment form, Cd and Zn negative correlation between and in the vertical direction, Cd relative enrichment at the top ratio middle and bottom in the ore body.3、Ag of isomorphous enriched with pyrite, in the early mineralization stages of pyrite. Ag and Cu were positively correlated inearly generations of pyrite.4、The study of Carbon and Oxygen Isotope in Gangue minerals study CO2 of fluid caused by the dissolution of carbonate rocks, temperature is calculated to be 312.9℃ sphalerite, galena in hydrogen and oxygen isotopic compositions and tracing ore-forming fluids from the formation water, also may be affected by the mixing of magmatic water; Characteristics of Pb isotopic compositions show that the main source of lead ore in the upper crust and orogenic belt, the mineralization and the condition of plate subduction, metallogenic epoch of late Indosinian. Comprehensive research believes that the deposit belongs to the Huize (HZT) type lead-zinc deposits.