江西金山金矿田矿山辐射调查

A SURVEY OF RADIOELEMENTS IN JINSHAN GOLD FIELD,JIANGXI PROVINCE

对金山金矿田的金山金矿、花桥金矿区露天水源天然铀、氡， 居民区和井下作业人员γ外照射有效剂量等进行调查的结果表明： 金山、西蒋矿区露天水源天然铀、氡浓度均小于限值０．０５ ｍ ｇ／Ｌ和３７．００ Ｂｑ／Ｌ， 空气氡浓度为０．００８～０．０１３ Ｂｑ／Ｌ． 居民和井下作业人员γ外照射年有效剂量均小于１ ｍ ｓ 和５ ｍ ｓ． 矿区放射性均在国家规定的环境评价指标限制之内，

Jinshan gold field is a new type of metamorphic hydrothermal ore deposit within ductile shear zone.The mineral composition is simple, which belongs to low sulfide type.Pyrite is the main metallic mineral and gold carrier.The fineness of native gold, the only one kind of gold mineral and valuable constituent, is high.The fine and coarse gold exist associatively. In this artical the authors investigate the contents of natural uranium and radon in open headwaters and the annual effective dosage of ultragamma irradiation in residence and the operation man working in pit.The results of investigation are: the concentration of natural uranium and radon in Jinshan and Xijiang gold field are both less than the limit quantity-0 05 mg/L and 37 00 Bq/L;the concentration of radon in the air is 0 008~ 0 013 Bq/L.The annual effective dosage of ultragamma irradiation on the residents and operation man working in pit are less than 1 msv and 5 msv repectively. In mining area the radioactivity is in the limitation of environment targets set by the government,it has no effect on miners and environment.