采用综合异常指数实现综合异常自动圈定——以梧桐沟地区1∶5万土壤测量为例
|
摘要
综合异常圈定是地球化学普查中重要的工作程序之一,合理有效的综合异常圈定、评价与筛选有利于综合异常查证工作的开展。利用梧桐沟地区1∶5万土壤测量数据,首次定义了富集系数(Q)、综合异常指数(Z)等特征参数,并采用GeoIPAS软件实现综合异常的自动圈定。通过综合异常指数自动圈定异常(Z1、Z2、Z3)与常规人为圈定综合异常(Z0)的对比,建议先利用综合异常指数圈定,再根据地质因素调整的方法来确定最终采用的综合异常。此外,利用综合异常指数可以圈定出综合异常的三级浓度分带,能够增强找矿工作部署的针对性,避免或减少了工作部署过程中的不合理性。
Comprehensive anomalies delineation is one of the important working procedures of geochemical prospecting,and delineation,evaluation and selection of reasonable comprehensive anomalies are advantageous to the check and testifies of comprehensive anomalies.Based on 1∶50 000 soil survey data of Wutonggou region,by defining the parameters of enrichment factor(Q)and the comprehensive anomaly index(Z),we used GeoIPAS software to realize the automatically delineation of comprehensive anomalies.By comparing the automatic delineation of anomalies of using comprehensive indices with the artificial delineation of comprehensive anomalies,advice can be contoured to using comprehensive anomaly index first,then according to the geological factors adjustment method to determine the final comprehensive anomaly.In addition,the comprehensive anomaly index can be used to delineate the three-level concentration zoning of the comprehensive anomaly,which can enhance the pertinence of the prospecting work deployment and avoid or reduce the irrationality of the work deployment.
Comprehensive anomalies delineation is one of the important working procedures of geochemical prospecting,and delineation,evaluation and selection of reasonable comprehensive anomalies are advantageous to the check and testifies of comprehensive anomalies.Based on 1∶50 000 soil survey data of Wutonggou region,by defining the parameters of enrichment factor(Q)and the comprehensive anomaly index(Z),we used GeoIPAS software to realize the automatically delineation of comprehensive anomalies.By comparing the automatic delineation of anomalies of using comprehensive indices with the artificial delineation of comprehensive anomalies,advice can be contoured to using comprehensive anomaly index first,then according to the geological factors adjustment method to determine the final comprehensive anomaly.In addition,the comprehensive anomaly index can be used to delineate the three-level concentration zoning of the comprehensive anomaly,which can enhance the pertinence of the prospecting work deployment and avoid or reduce the irrationality of the work deployment.
引文
[1]程志中,谢学锦.岩石中元素背景值变化对地球化学成矿预测的影响[J].中国地质,2006,33(2):411-417.
[2]赵荣军.不同方法在栾川北部化探数据处理中的应用[J].地质与勘探,2006,42(3):67-71.
[3]谢学锦,刘大文,向运川.地球化学块体—概念与方法学的发展.中国地质,2002,29(3):225-233.
[4]谢学锦,邵跃,等.走向21世纪:矿产勘查地球化学[M].北京:地质出版社,1999.
[5]中国地质调查局.化探异常筛选及评价方法[M].1999.
[6]赵娟,孙泽坤,贾研慧,等.青海省祁漫塔格地区1∶5万水系沉积物测量衬值异常圈定实例[J].地质与勘探,2016,52(3):518-523.
[7]邱炜,何皎,熊寿加.青海北祁连区域化探数据处理中异常衬值法的应用及成效[J].黄金科学技术.2015.23(1):34-39.
[8]董连慧,屈迅,朱志新,张良臣.新疆大地构造演化与成矿[J].新疆地质.2010.28(4):351-357.
[9]新疆维吾尔自治区地质矿产局.新疆维吾尔自治区岩石地层[M].武汉:中国地质大学出版社,1999.
[10]王克卓,朱志新,赵同阳.天山造山带古生代侵入岩地质特征及构造意义[J].新疆地质,2017,35(4):355-372.
[11]董莲慧,冯京,刘德权,等.新疆成矿单元划分方案研究[J].新疆地质,2010,28(1):1-15.
[12]段新力,毕武,彭仲秋,等.“跨平台金维地学信息处理研究应用系统”(GeoIPAS V3.2)的用户操作手册:8版[M].新疆乌鲁木齐金维图文信息科技有限公司,2014.
[2]赵荣军.不同方法在栾川北部化探数据处理中的应用[J].地质与勘探,2006,42(3):67-71.
[3]谢学锦,刘大文,向运川.地球化学块体—概念与方法学的发展.中国地质,2002,29(3):225-233.
[4]谢学锦,邵跃,等.走向21世纪:矿产勘查地球化学[M].北京:地质出版社,1999.
[5]中国地质调查局.化探异常筛选及评价方法[M].1999.
[6]赵娟,孙泽坤,贾研慧,等.青海省祁漫塔格地区1∶5万水系沉积物测量衬值异常圈定实例[J].地质与勘探,2016,52(3):518-523.
[7]邱炜,何皎,熊寿加.青海北祁连区域化探数据处理中异常衬值法的应用及成效[J].黄金科学技术.2015.23(1):34-39.
[8]董连慧,屈迅,朱志新,张良臣.新疆大地构造演化与成矿[J].新疆地质.2010.28(4):351-357.
[9]新疆维吾尔自治区地质矿产局.新疆维吾尔自治区岩石地层[M].武汉:中国地质大学出版社,1999.
[10]王克卓,朱志新,赵同阳.天山造山带古生代侵入岩地质特征及构造意义[J].新疆地质,2017,35(4):355-372.
[11]董莲慧,冯京,刘德权,等.新疆成矿单元划分方案研究[J].新疆地质,2010,28(1):1-15.
[12]段新力,毕武,彭仲秋,等.“跨平台金维地学信息处理研究应用系统”(GeoIPAS V3.2)的用户操作手册:8版[M].新疆乌鲁木齐金维图文信息科技有限公司,2014.