基于地质异常单元金矿找矿有利地段圈定与评价

GEOLOGICAL ANOMALY UNIT-BASED DELINEATION AND ASSESSMENT OF PREFERABLE GOLD ORE-FINDING AREA

许多大型、超大型内生金属矿床通常位于壳幔结构复杂的区域，如不同类型岩石圈板块的边界等，从而形成一些诸如环太平洋金属成矿带等全球规模的成矿域．对一些内生热液金属矿床就位的地质条件的统计分析表明：几乎所有被调查的主要工业矿床的矿田地质结构与其周围地区相比都具有显著差异，而表现为异常的特征．这些异常的时空域被定义为地质异常．地质异常单元是基于地质异常概念应用多学科信息综合定量标度的致矿信息单元．以中国东部鲁西隆起区成矿预测为例，阐明了应用地质异常单元综合定量圈定金矿找矿有利地段的方法学原理．

A large number of large-sized and super-large-sized endogenetic metal deposits are usually located within the areas with complex crust and mantle structures such as various types of boundary zones between lithospheric plates, resulting in some global-scale metallogenic fields such as the circum-Pacific Au and Cu-Mo metallogenic belts, typical of geological anomaly areas. The statistical analysis of some endogenetic hydrothermal metal deposits situated in different regions in the former Soviet Union in 1970's show that sharp differences, defined as the anomly features, in the geological structure of the orefield arose between major industrial ore deposits under investigation and their neighboring regions. In this case, these anomalous spatial and temporal fields can be defined as the geological anomaly. The geological anomaly unit is the geological anomaly based ore-generating information unit incorporating the comprehensive quantitative scale of multi-disciplinare information. This paper illustrates the principle and methdrilogy of the application of the geological anornaly unit to the comprehensive quantitative delineation of the preferable gold ore-finding area with the metallogenic prediction in the uplifted area, west of Shandong Province, eastern China as an example.