| 摘要: |
| 现阶段以单元素异常图为基础编制的综合异常图，只能定性地圈定出综合异常范围，并没有考虑异常点元素彼此之间的叠加贡献，不能定量评价综合异常。研究发现，该类图件不论在图面表达形式还是在应用效果中均存在诸多不足。明确了“平均衬度法”的概念，提出利用平均衬度法编制综合异常图的思路和方法，即以原始分析数据为基础，利用平均衬度定量表达综合异常范围，编制形成平均衬度综合异常图。对比结果表明，平均衬度法对综合异常的圈定效果优于累加衬度法和综合衬度法。平均衬度综合异常图特别适合1∶5万化探普查资料的开发研究，由于圈定的范围小、浓集中心明显，适合准确布置地表探矿工程，并可以节约勘查成本，提高找矿命中率。 |
| 关键词: 平均衬度综合异常图 定量 平均衬度法 浓集中心 |
| DOI： |
| 分类号:P632 |
| 基金项目:内蒙古地勘基金项目《内蒙古布日都大队幅等四幅1∶5万区域地质矿产调查》（编号：NMKD2008-17）和黑龙江地勘基金项目《黑龙江省黑河市新生幅等三幅1∶5万区域地质矿产调查》（编号：HLJKD2005-06） |
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| A quantitative method for integrated anomaly map of geochemical prospecting and application |
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LI Huan1, XU Guozhi2, SUN Lu2, LI Peng2, DENG Yufei3
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1.Beijing Institute of Geo-exploratin Technology, Beijing 100120, China;2.Hebei GEO University, Shijiazhuang 050031, Hebei, China;3.China Chemical Geology and Mine Bureau Research Institude of Geological, Beijing 100101, China
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| Abstract: |
| At the present stage, the integrated anomaly map is prepared on the basis of single element anomaly map, only the integrated anomaly range can be delineated qualitatively, the superposition contribution of outliers cannot be considered, and the synthetic anomaly cannot be evaluated quantitatively. It is found that there are many shortcomings in this kind of maps both in the form of surface representation and the application effect. In this paper, the authors defined the concept of "average contrast method" and put forward the idea and method of using "average contrast method" to compile integrated anomaly map. Based on the original analysis data, the authors used the average contrast degree to quantitatively express the integrated anomaly range, thus forming an integrated anomaly map of average contrast. The contrast result shows that the average contrast method is better than the additive contrast method and the integrated contrast method. The average anomaly integrated anomaly map is particularly suitable for 1:50000 geochemical exploration census data development research on account of small range and concentration center. It is suitable for accurate layout of the surface prospecting project and can save the cost of exploration as well as improve ore hit rate. |
| Key words: average contrast integrated anomaly map quantitative average contrast method concentration center |
