CAJ | 학술논문

本文选择被风化物覆盖(4米至几十米厚)的金窝子金矿作为研究对象.分析矿体上方风化层和非矿上方的垂直剖面中的各种金属元素的总量及活动态含量,以获得金属元素在风化层中的活动规律,为化探找矿提供方法依据.结果发现金等的某种活动态的分布模式在矿体上方呈现双层分布,即他们趋向于在垂直剖面的底部与顶部富集,而在中部降低.可以解释为元素在剖面底部风化层中的富集是由于金继承了矿体的风化产物,而在地表或近地表的富集是由于从矿体迁移至地表的元素被粘土物质和铁锰氧化物膜所吸附.
본문선택피풍화물복개(4미지궤십미후)적금와자금광작위연구대상.분석광체상방풍화층화비광상방적수직부면중적각충금속원소적총량급활동태함량,이획득금속원소재풍화층중적활동규률,위화탐조광제공방법의거.결과발현금등적모충활동태적분포모식재광체상방정현쌍층분포,즉타문추향우재수직부면적저부여정부부집,이재중부강저.가이해석위원소재부면저부풍화층중적부집시유우금계승료광체적풍화산물,이재지표혹근지표적부집시유우종광체천이지지표적원소피점토물질화철맹양화물막소흡부.
Desert terrains in the northwestern China are widely covered by regolith sediments, which mask geochemical signals of ore bodies and are a main obstacle to mineral exploration. It is needed imminently to study the vertical geochemical variation of metal elements and the potential transfer mechanism from the ore body to its regolith cover and to the ground surface in order to find proper samples in the field and to choose proper analytical methods in the laboratory. The Jinwozi gold deposit which is covered by regolith sediments (4 to tens of meters thickness) was selected for investigation in this paper. Samples were taken from regolith horizons in 2 vertical profiles over the deposit. It was found that the distribution pattern of Au and associated elements in the vertical profile looked like a letter "C", in other words, they tended to enrich at the bottom and the upper of the vertical profile over the ore body and deplete at the middle. Metals were enriched in weathering rocks may be due to inheritance of their high contents in the ore body, whereas metals were enriched at or near ground surface may be due to adsorption by clays or oxide coatings. Gold tends to migrate vertically to the ground surface and to be trapped by geochemical barriers, such as clay matters and oxide coatings of Fe,Mn, to produce superimposed anomalies in the regolith near or at the ground surface.