地气测量在内蒙老羊壕金矿区的某些试验成果

SOME TEST RESULTS OF GEOGAS SURVEY IN THE LAOYANGHAO GOLD ORE DISTRICT, INNER MONGOLIA

以内蒙老羊壕金矿区为试验基地 ,引进抽气法地气测量 ,探讨了地气测量在内蒙干旱荒漠区寻找浅覆盖区隐伏金矿床的有效性。并以试验资料为依据 ,初步探讨了抽气法地气测量中的若干问题 ,指出了抽气法地气测量中存在微尘颗粒干扰。对寻找隐伏金矿床的多元素地气测量 ,采用经 0 .2 2 μm微孔滤膜过滤泡沫塑料吸附为好。已有资料显示可能有超微粒 (接近纳米级 )

With the Laoyanghao gold ore district in Inner Mongolia as the test base, the present paper, using air-extracting geogas in prospecting for concealed gold deposits within shallow overburden of arid desert areas. On the basis of test data, the paper deals tentatively with some problem existent in air-extracting geogas survvey. It is pointed out that air-extracting geogas survey suffers from interference of dust particles and that, in multielement geogas survey for concealed gold deposits, the results will be better when foamed plastic of 0.22 μm mesh millipore filter membrane is used to perform adsorption. Data available demonstrate that ultramicrograined particles (close to the order of nm) might migrate upward from orebodies at the depth.