| The Jiaotongshe niobium and tantalum deposit is located in the northern section of the aljin orogenic belt.It is a newly discovered niobium and tantalum deposit.Taking this deposit as the research object,this paper studies and summarizes the geological characteristics of the deposit and the law of mineralization and enrichment through the investigation of the geological characteristics of the deposit,so as to guide the next prospecting work.The achievements and understanding are as follows:The Jiaotongshe niobium and tantalum deposit is located in haixi Mongolian Tibetan autonomous prefecture of Qinghai province.The outcrops in the study area are mainly the upper rocks of the paleoproterozoic Dakendaban group.The intrusive rocks are quartz diorite,granite diorite,alkali feldspar and diorite porphyrite,and the tectonic stages are divided into 5stages.Niobium-tantalum ore is mainly controlled by the near-north-south fault and alkali feldspar.The ore-bearing lithology is dimica schist and limonized marble.The Jiaotongshe niobium and tantalum mining area divided four mineralization belt,including?,?,?are gold orebody in the ore belt;?ore belts for niobium tantalum ore,circle the niobium tantalum ore body of article 6,200-2640-m long,the thickness of4.87-13.65 m,grade?Nb2O5?0.016-0.034×10-2;The ore body is controlled by alkali feldspar granite;Mineralization alteration mainly includes skarn mineralization,silicification,carbonation and yunying mineralization.Niobium-tantalum ore is closely related to skarn mineralization and yunying mineralization.The main types of niobium-tantalum ore are niobium iron ore and tantalum iron ore.Niobium tantalum ore controlled by alkali granite long,near the long and alkali granite with silicon card lithification,niobium,tantalum ore body significantly increased,the thickness of the grade of ore body in deep has rich bigger trend,niobium,tantalum ore elements of niobium,tantalum from alkali granite,long long alkali granite for ore-forming material,energy,fluid and other conditions,the silicon card lithification near with plenty of Nb and Ta,rare,rare earth element concentration in the mica schist,formed the niobium tantalum ore shoot.Aiming at the actual situation of mining area,this paper finally puts forward the ore prospecting sign and the analysis of ore prospecting potential,in order to make a breakthrough in ore prospecting. |
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