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《Chinese Geology》 2001-10
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Modes of occurrence of gold in supergene medium in arid areas of northern China

DING Tian-cai 1 ,SU Mei-xia 1 ,LENG Fu-rong 2 (1.Inner Mongolia Institute of Geological Survey,Hohhot010020,Inner Mongolia,China;2.Inner Mongolia Institute of Land and Resources Exploration and Development ,Hohhot010020,Inner Mongolia Ch  
The authors have studies seven modes of occurrence of gold in the supergene medium in arid areas of northern China.The results of study indicate that gold occurs main-ly as the native gold phase(over50%)and less commonly as the water-soluble phase,ad-sorbed phase and organic phase.The water-soluble phase gold is prevalent in the arid climat-ic zone of northern China,suggesting that gold in the supergene medium of gold deposits of this natural landscape region is markedly soluble and migrates in the water-soluble phase gold,and when the physical-chemical conditions of the environment change gold is precipi-tated and concentrated locally.When the field polyfoam gold-measuring method is applied,the gold anomaly shows a high contrast value and a good stability.So the method yields good ore-finding results.
【CateGory Index】: P618.51
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