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化探综合异常图定量编制方法及应用
引用本文:李欢,徐国志,孙璐,李朋,邓宇飞.化探综合异常图定量编制方法及应用[J].地质通报,2019,38(6):1062-1070.
作者姓名:李欢  徐国志  孙璐  李朋  邓宇飞
作者单位:北京市地质勘察技术院, 北京 100120,河北地质大学, 河北 石家庄 050031,河北地质大学, 河北 石家庄 050031,河北地质大学, 河北 石家庄 050031,中化地质矿山总局地质研究院, 北京 100101
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)
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
收稿时间:2017/11/6 0:00:00
修稿时间:2018/3/4 0:00:00

A quantitative method for integrated anomaly map of geochemical prospecting and application
LI Huan,XU Guozhi,SUN Lu,LI Peng and DENG Yufei.A quantitative method for integrated anomaly map of geochemical prospecting and application[J].Geologcal Bulletin OF China,2019,38(6):1062-1070.
Authors:LI Huan  XU Guozhi  SUN Lu  LI Peng and DENG Yufei
Institution:Beijing Institute of Geo-exploratin Technology, Beijing 100120, China,Hebei GEO University, Shijiazhuang 050031, Hebei, China,Hebei GEO University, Shijiazhuang 050031, Hebei, China,Hebei GEO University, Shijiazhuang 050031, Hebei, China and China Chemical Geology and Mine Bureau Research Institude of Geological, Beijing 100101, China
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.
Keywords:average contrast integrated anomaly map  quantitative  average contrast method  concentration center
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