基于Surfer软件趋势面方法的区域化探资料二次开发与找矿预测——以九瑞铜多金属矿集区为例

The Secondary Development and Prospecting Prediction of Regional Geochemical Data based on Surfer Software Trend Surface——Giving an Example of Jiurui Copper Polymetallic Ore-Concentrated Area

地质资料的二次开发是金属矿山成矿预测的一个有效途径。笔者在承担九瑞铜多金属矿集区找矿科研工作中,基于Surfer软件,应用"多元回归法",对九瑞铜多金属矿集区上世纪90年中后期的1/5万土壤地球化学测量数据进行二次开发,通过其各观测点主成矿元素三次趋势面分析正剩余值计算及异常等值线的圈定,有效地消除传统方法编制的地球化学图产生的噪音,从而更真实、客观、全面、准确地反映出元素的客观分布规律。在此基础上,结合九瑞铜多金属矿集区的成矿规律,对比土壤地球化学三次趋势面正剩余值等值线与金属矿(化)床(点)的空间分布关系,开展了金属矿找矿预测,圈定出找矿有利地区,为九瑞铜多金属矿集区下步找矿工作提供了重要依据。

The secondary development of geologic data was an effective way of metallogenic prediction of metalliferous mines.Using image factoring based on Surfer,we reanalyzed the 1/50000 geochemical soil survey data in the late1990’s.By locating the positive residual value counted by third trend surface analysis and isoanomalic contour of the main metallogenic element every observing point,we effectively abated the noise from geochemical map made by traditional methods and reflected objective distribution of elements more truthfully,comprehensively and exactly.On the basis of this,combining metallogenic regularity in Jiurui copper polymetallic ore-concentrated area and comparing of the relationship of the positive residual contour of soil geochemical three trend surface and the spatial distribution of ore deposit(or mineralization point),we developed the metal ore prospecting prediction and delimited the favorable areas for prospecting,which provided an important basis for the next prospecting work in Jiurui copper polymetallic ore-concentrated area.