Study On The Mineralization And Prospecting Model Of Xiaokele River Copper(Molybdenum) Ore In Xinlin District,Heilongjiang Province

Xiaokeler river area inHeilongjiang province is located in the Xinlin area ofDaxing'anling,southeast of Xinlin town.The district is under the jurisdiction of Xinlin.The geotectonic unit is located on the eastern slope of the northern part of the Mesozoic volcanic rock belt in the daxing 'anling,and on the middle uplift belt of Ermuer mountain of the ergunna block,belongs to Daxing'anlingpolymetal mineralization belt.It is located at the intersection of Huanyu-xinlin late proterozoic-early Cambrian ophiolitic melange zone and daxing 'anling volcanic zone.In recent years,great progress has been made in geological and mineral exploration in this region.1:50,000 regional geological and mineral survey has been completed in this region,a relatively systematic layer sequence was established to determine the age of the intrusive rock and investigate the mineral in the region.This paper is based on the project of "study on the metallogenic regularity and prospecting potential of XiaolaokeleRiver copper(molybdenum)mining area and its periphery in the Xinlin area of Heilongjiang province" of Land and resources department of Heilongjiang province.Summarized The ore-forming geological conditions in the area,Geophysical and geochemical data,Preliminary analysis of the matter and geochemical exploration,study The metallogenic model of this area.The subdivided zone is in the Ergua formation zone and the Fukeshan-xinghua area.The mainly exposed strata include Wolegen group Auspicious groove group and Big net group of the lower ordovician-lower Silurian;the old albino set of Mesozoic the upper Jurassic system;Guanghua and Ganhe group of Lower cretaceous;Yaluhe Fm and Holocene series of Cenozoicquaternary system upper Pleistocene.The intrusive rocks in the area are divided into two times and two intrusive bodies.There are syenogranite of Late carboniferous epoch,Quartz monzonite,granodiorite and granodiorite-porphyry of Early cretaceous.In addition,there are the distribution of dykes in different times.The granodiorite-porphyry of Early cretaceousis the main ore-bearing rock body.The tectonic activity is strong in different periods in the region,folds and faulted structures are mainly developed.After the work of the latest magnetic method and the induced polarization intermediate gradien survey cover the work area,through comparison with different mineralization degrees in the areas with higher working degree,the IP anomalies in the areas with good mineralization are medium and high polarization,low(medium)resistance,and the magnetic anomalies are mainly weak negative magnetic anomalies,thenthe weak positive and negative magnetic anomalies step belts(Erosion causes degaussing).The high magnetic anomaly is caused by mesobasiteor intermediate-basic volcanic rock.The emergence of the areas with strong Cu and Mo anomalies is Ordovician jixiang formation,Cretaceous guanghua formation have been denuded.The combination of Cu and Mo anomalies is good,and there is a regular pattern distribution.The Mo anomalies are located in the abnormal center,and the range is smaller than Cu.showing the abnormal distribution characteristics of porphyry type deposits.Au anomalies are located in the north east of Cu and Mo anomalies,and are distributed evenly in the strata of Auspicious groove group.The genetic relationship between Au and Cu and Mo mineralization is currently difficult to determine.According to the preliminary analysis,the Au anomaly is caused by another phase of medium temperature and hydrothermal vein gold mineralization.There is no obvious regularity of vertical zoning of Cu and Mo,and the correlation between them suggests that there may be superposition of multi-stage mineralization in this area.The industrial copper molybdenum ore body mainly occurs in the middle and lower part of sericite and the potassium belt,Mineralization shows copper-molybdenum coexistence.The kalification zone stores siliceous fine veins of chalcopyrite and molybdenum,also can form rich ore.The kalification zone of this deposit is mainly composed of siniolitization,and The composition of miconization(mineralization)can also be seen.The alteration and mineralization in this ore area are typical represented in space as porphyry deposit alteration and mineralization.The salinity and temperature of ore-forming fluids are consistent with the characteristics of porphyry deposits.Based on geological,geophysical and geochemical data,this paper makes a comprehensive study and analysis,the model of mineralization and prospecting was established,five key target areas were identified to lay the theoretical foundation for the next exploration.