The Research On The Geochemical Characteristic And Genesis Of Tungsten Deposit In Taoxikeng, JiangXi

Tungsten resource is a kind of dominant mineral in Gannan .Wolframite metalthere is about 40% of the whole country's storage and tungsten preparationconcentrate 50% . However,most historial tungsten mines in Gannan are faced with aresource crisis .the situation is not optimistic .Thus to enhance the genesis research ofdeveloped ore deposits is very important .From this we may guide ore exploration andthe secondary develop of that area better .on the basis of comprehensive analysis onthe forms of orebodies , composition alteration , texture and structure of the ores ofthe TAOXIKENG tungsten deposit , and the relationship between the granite as wellas the alteration of the country rock and tungsten deposit , the genesis type of thetungsten deposit in this area is available .Since the deposits are mainly in the epizonalmetamorphite of the outer contact zone of granite body ,the REE partitioncharacteristic of ore has a great similarity with that of the granite deep down the orebody,and the content of metallogenic trace element in the granit deep down the orebody is several times or tens of times higher than that in common acid rocks incrust.This indicates that the granit may have mailly provided the metallogenicmateril.Wolframite ,cassiterite ,chalcopyrite are the prime minerals;The wall-rockalteration beside mineral vein is mostly silication;Fluorites are often found besidewolframite rich-bearing rocks,their symbiosis presents that wolframites were formedwith a high temperature , in other words,the metallogenic phase was maillyhypothermal .From our research we also find that ,ore type in this area iswolframite-quartz vein-sulphide;granit is S-type and its evolution sequence might begranomonzonite → muscovite-granite(outcrop) → feldspar-granit →muscovite-granite(core);from upper to lower position,ore vein's thickness grows,itconform to the "5-floor"style.