Geological Characteristics of the South Section of the Nuri Copper Polymetallic Deposit in Tibet and the Exploration Application of Short-Wave Infrared Spectra
The Nuri deposit in Tibet is the only large deposit with Cu-W-Mo mineralization in the Gangdese metallogenic belt,with great prospecting potential and fruitful results.With the deepening of mineralization theory and research,there is an urgent need to use new methods and technologies to meet the needs of deep mineral exploration in the region.This study used short wave infrared spectroscopy(SWIR)to study typical altered minerals in the southern section of the Nuri copper polymetallic deposit.Based on the geological characteristics of the deposit,altered mineral combinations,alteration mineral zoning characteristics,and spectral analysis results,this work summarized the distribution patterns of SWIR spectral characteristics of typical altered minerals,and then determined the exploration indicators.The study concludes that indicators including albite Pos2200>2208 nm,illite Pos2200>2203 nm,chlorite Pos2250>2249 nm,can be used as effective exploration indexes of alteration minerals for the Nuri skarn-type Cu-polymetallic deposit.Accordingly,this study conducted metallogenic prediction of the deep porphyry copper deposit based on the geological characteristics and the distribution patterns of altered minerals in the southern Nuri ore district.It is inferred that the quartz diorite(porphyrite)on the east side of the prospecting line No.45 in the southern ore section has the potential for prospecting porphyry copper deposits,which provides direction and ideas for the future prospecting in the mine.
short-wave infrared spectrumaltered mineralcopper polymetallic depositsouth section of NuriGangdese metallogenic belt
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