新疆阿尔泰北部山区金的分布型式与区域背景特征

Background and Distribution Pattern of Gold Content in Northern Mountain Area of Altai,Xinjiang Province

根据单一地球化学过程所形成的化学元素的分布为正态分布的原理，利用直方图综合分解法对新疆阿尔泰北部山区金复合总体进行了总体分解。结果表明，该区金的分布型式服从对数正态分布，并至少由背景子总体、矿化子总体和成矿子总体构成。该区金平均背景值为２．１８×１０￣（－９），表明该区具有良好的原生金矿找矿前景。

ccording to the principle that the distribution of chemical elements formed in a single geochemical process submits to normaldistribution,the author had decomposed to the gold content mixture population of northern mountain area of Altai with themethod of distigram synthesis decomposition in this paper. It suggested that the distribution pattern of gald-content in the areaobeys log normal distribution,and involves at least three subpopulations.The study shows the area is a good perspective for pri-mary gold deposit searching.