Geological Characteristics And Exploration Implications Of The Taoxikeng Tungsten Deposit In Chongyi County,Jiangxi Province

Taoxikeng tungsten deposit is located in Jiulongnao-Taoxikeng orefield of the Chong-Yu-You tungsten-tin ore concentrated area which lies in the eastern latitudinal tectonic belts of Nanling region.It is a quartz vein type wolframite deposit with a typically metallogenic model of"Five Floors+Basement".The occurrence of the veins is characterized by the surface indication zone,veinlet zone down to 456 metres,veinlet-large mixing zone at the depth of 356 metres,and large-huge zone below 206 metres.Composed of medium-fine grained and porphyritic-bearing biotite granite,the hidden rock mass is exposed at elevation of+156 metres to-400 metres.Along the top of contact surface,the greisen mineralization occurs in stratiform or stratiform-like form or vein.In the mining area,the average grade of tungsten is 3.08%.A further study found that there is metallogenic zoning of "Floors under Floors "(quartz veins in internal zone of granite body)in deeper of the mine Taoxikeng tungsten deposit.The "Floors under Floors" type appears in the hidden granite between Baoshan and Langengzi section,showing net nervation distribution.At present,the scale of "Five Floors+Basement" has not yet reach industrial application value,but the "Floors under Floors " type,up to 15-20%of total reserves,has a very significant value for industrial applications.Therefore,combination of"Five Floors+Basement" and "Floors under Floors",the research proposes a metallogenic model of "Five Floors+Basement+under Floors".By studying on metallogenic model of typical tungsten deposit and using the metallogenic theory of "Five Floors+Basement+under Floors" model,it is advantageous for carrying out geological prospecting work in the area.Furthermore,the metallogenic model has a good application in periphery prospecting,especially in deep prospecting.For instance,it is found that there are two new concealed tungsten polymetallic metallogenic zones including Zengshanli and Xikengkou in Dongfeng mining area south of Taoxikeng,and the geophysical anomaly also reveals the existence of hidden granite.The tungsten polymetallic ore bodies of "Five Floors"type are detected in Changliukeng mining area north of Taoxikeng,accompanied by skarn-type scheelite at the side of quartz veins,which possibly implies the existence of hidden rock mass.According to results through the metallogenic model theory,it further indicates the possibility for "Floors under Floors".