化探综合异常图定量编制方法及应用
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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。
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.
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.
引文
[1]郭科,陈聆,唐菊兴,等.基于卡尔曼滤波的信息融合技术在区域化探异常综合评价中的应用探索[J].地学前缘,2006,5:533-536.
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[8]丛源,陈建平,肖克炎,等.“三江”地区北段区域地球化学元素组合异常提取及其找矿意义[J].地质通报,2012,21(7):1164-1169.
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[11]黄力军,刘瑞德,陆桂福,等.乌奴格吐山铜矿物化探异常特征及外围找矿[J].物探与化探,2004,5:418-420,424.
[12]张勤山,马楠,郝亚青,等.综合化探方法在青海夏日哈木超大型铜镍矿床中的找矿应用[J].物探与化探,2016,3:429-437.
[13]张勤山,马楠,郝亚青,等.综合化探方法在青海夏日哈木超大型铜镍矿床中的找矿应用[J].物探与化探,2016,3:429-437.
[14]王嘉伟,李小强,陈清石,等.区域地球化学特征及其主控因素——对内蒙古珠斯楞地区找矿的意义[J].地质通报,2016,35(9):1544-1549.
[15]孙彬彬,周国华,刘占元,等.黄河下游山东段沿岸土壤中重金属元素异常的成因[J].地质通报,2008,17(2):265-270.
[16]史长义,张金华,黄笑梅.子区中位数衬值滤波法及弱小异常识别[J].物探与化探,1999,4:11-18.
[17]高四新,赵强,王超,等.应用衬度异常量法在宁夏六盘山立洼峡寻找铅锌矿[J].物探与化探,2014,17(2):363-369.
[18]中华人民共和国地质矿产行业标准地球化学勘查图图式、图例及用色标准(DZ/T 0075-93)[S].中华人民共和国地质矿产部,1993.
[2]杨利民,杨自安,罗铁良,等.成矿能量在化探综合异常提取中的应用研究[J].矿产与地质,2008,1:74-77.
[3]中华人民共和国地质矿产行业标准1:50000地球化学普查规范(DZ/T 0011-2015)[S].中华人民共和国国土资源部, 2015.
[4]张伟,陈陵康,张高强,等.西藏冲江地区地球化学综合异常图的编制[J].物探化探计算技术,2010,6:651-654,569.
[5]袁义生,刘应忠,罗明学,等.应用MAPGIS制作地球化学图单元素异常图及综合异常图[J].贵州地质,2007,2:156-160.
[6]李欢,徐国志,刘宏哲,等.利用衬度法绘制化探综合异常图[J].现代矿业,2016,6:158-159,162.
[7]蔡朝阳,孙德有,吴国学.MapGIS与Surfer相结合在黑河市化探工作中的应用[J].物探与化探,2009,2:220-223.
[8]丛源,陈建平,肖克炎,等.“三江”地区北段区域地球化学元素组合异常提取及其找矿意义[J].地质通报,2012,21(7):1164-1169.
[9]严己宽.“区域异常集中度”的概念、计算方法及其与成矿的关系[J].地质通报,2011,20(11):1802-1808.
[10]陈明,何凯涛,王全明,等.地球化学场精细结构解析方案与应用[J].地质通报,2004,13(2):147-153.
[11]黄力军,刘瑞德,陆桂福,等.乌奴格吐山铜矿物化探异常特征及外围找矿[J].物探与化探,2004,5:418-420,424.
[12]张勤山,马楠,郝亚青,等.综合化探方法在青海夏日哈木超大型铜镍矿床中的找矿应用[J].物探与化探,2016,3:429-437.
[13]张勤山,马楠,郝亚青,等.综合化探方法在青海夏日哈木超大型铜镍矿床中的找矿应用[J].物探与化探,2016,3:429-437.
[14]王嘉伟,李小强,陈清石,等.区域地球化学特征及其主控因素——对内蒙古珠斯楞地区找矿的意义[J].地质通报,2016,35(9):1544-1549.
[15]孙彬彬,周国华,刘占元,等.黄河下游山东段沿岸土壤中重金属元素异常的成因[J].地质通报,2008,17(2):265-270.
[16]史长义,张金华,黄笑梅.子区中位数衬值滤波法及弱小异常识别[J].物探与化探,1999,4:11-18.
[17]高四新,赵强,王超,等.应用衬度异常量法在宁夏六盘山立洼峡寻找铅锌矿[J].物探与化探,2014,17(2):363-369.
[18]中华人民共和国地质矿产行业标准地球化学勘查图图式、图例及用色标准(DZ/T 0075-93)[S].中华人民共和国地质矿产部,1993.