| Luanchuan molybdenum ore concentration area Dongyuku tungstenmolybdenum beds is a newly discovered large molybdenum tungsten deposit, thatLocated in China Eastern metallogenic domain east Qinling-Dabie mountainmolybdenum metallogenic belt. The study area Located in the southern margin ofnorth China continental blocks north qinling tectonic belt. It is nearly east-westdistribution, main thing stretching thousands of miles, north and south, generally lessthan60km wide. It is from the form to construct the most complex in the QinlingOrogenic Belt.In this paper, I carry out the system of metallogenic dynamics, petrology and workfor Dongyuku molybdenum tungsten. It have the Structure characteristics of thestructure of rock ore in detail the microscopic description. For rock ore geochemicalcharacteristics of trace elements and rare earth elements were studied, to reveal themetallogenic fluid and the origin and evolution of ore-forming materials;And therelevant porphyry metallogenic characteristics and ore concentration area in ourcountry comparison, proved the existence of this kind of deposit genetic type,combined with regional tectonic evolution and diagenetic mineralization chronologyinformation, the genesis of ore deposit model have been established.1,The basement in the study area of archaean is Taihua group, widespreadmigmatization.Out main outdoor layer is Guandaokou group Baishugou Formationand the LuanChuan group Sanchuan Formation, Nannihu Formation, MeiyaogouFormation and Dahongkou Formation, etc.The luanchuan fracture and Machaoyingfault is regional and its secondary fault camp, followed by ns, north west tofracture.This series of similar occurrence, southward thrust nappe fault into a series ofaxial plane nearly anything, between the north dipping overturned fold. 2,Porphyry mining area within the formation of porphyry tungsten molybdenumdeposit, outer contact zone of skarn one spot is formed rock type tungstenmolybdenum deposit.Horizontal annular zoning characteristics of anomaly areaclear.Outward from the abnormal area center, element combination, Bi, Cu, Mo, W inzinc, Pb, Ag, As, Ba, Ge, is a complete sequence from high to low temperatureselements.Mining area in the north west to fracture and fracture transition part of thenorth east to control the Yuku shape and the occurrence of the baserock.Huangbeiling-Shibaogou duplex anticline south west wing control theDongyuku tungsten molybdenum deposit.In front of the mineralization in the northeast to structural belt and the metallogenic period of structural joints, the degree offracture control the mineralization concentration areas.3, Closely related to mineralization of porphyry body for fish and Shibaogou rockmass, rock mass on alkali amount is higher. Ore-forming rock mass has high silicarich potassium, calcium, magnesium, and other content is relatively low.Rock mass ofmolybdenum content as high as40~100PPM. The equivalent of vickers granite40~100times, is conducive to the formation of molybdenum.Yuku rock mass enrichmentof relatively large ion lithophile elements (LILE) Rb, Ba, U, K, Y elements, such aslarger changes of rare earth elements and the total amount is not high, light and heavyrare earth fractionation, obviously has a weak negative europium anomaly.PorphyryShi Bao ditch has the characteristics of part of the crust-mantle mixed granite.4. The isotope test, Dongyuku molybdenum tungsten deposit and porphyrymetallogenic formation time: molybdenite Re-Os isotope weighted average age was146.58±0.94Ma;Shibaogou porphyry body zircon U-Pb age was150.3±0.3Ma.Ore-forming age slightly Yu Chengyan late age.Their corresponding geodynamicsbackground for China Eastern tectonic regime transformation period. |
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