Geological Characteristics And Prospect Analysis Of Tianjingwo Tungsten Deposit In East Nanling

The Tianjingwo tungsten deposit,typified with "Jiulongnao metallogenic model",is located in the southern margin of the Jiulongnao rock of the west of the Chong(yi)-(da)yu-(shang)yu tungsten and tin deposit area which is in the east part of the complex structural belt.It is a small-scale deposit discovered earlier in southern Jiangxi,which has not been broken through years of exploration.In recent years,As the level of exploration increases,more types of tungsten ore have been discovered,including quartz vein tungsten ore bodies with inner contact zone,skarn type tungsten ore bodies,altered granite type tungsten ore bodies and fluorite pegmatite type tungsten ore bodies,etc.which are produced respectively in different parts with complex type rich in the ore body.The upper ordovician guting formation limestone exposed in the Tianjingwo area leaves ore storage space.The ore-bearing hydrothermal fluid carried by the rock mass accumulates and migrates along the fracture zone,and the medium-high temperature gas-liquid metasomatism forms ore-bearing skarn.The samples of medium-grained granite and fine-grained granite were collected in the mining area,and the SHRIMP dating showed that the exposed rock in the Tianjingwo area was part of the complex part of Jiulongnao and was the metallogenic parent rock.Its multi-stage intrusion provides a large amount of ore-bearing hydrothermal fluid,which is the main source of metallogenic materials.The magnetization,polarization,resistivity,density and other parameters of the surface and borehole cores in the research area were tested,and the mineralization abnormal areas were delineated and the next step was determined by the work of IP medium step,IP sounding,audio magnetomagnetic sounding and surface geochemical sampling analysis.New concealed ore bodies have been found in the mining areas.The research has been made on the basis of geophysical and geochemical exploration anomaly areas and borehole engineering exposure,which synthetically analyzed the direction of metallogenic hydrothermal migration and studied the deep extended form of the contact surface between concealed rock mass and stratum has been found out for favorable ore-bearing space.It was concluded that the "Tianjingwo metallogenic model" had been preliminarily established,and the prospective reserves of the Tianjingwo deposit are predicted to be more than 20,000 tons,which has the potential to form medium-sized or large-scale tungsten and tin deposits.