位场异常分离方法的对比分析——以江西相山铀多金属矿田为例
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摘要
位场分离方法在重、磁数据处理和解释中发挥着重要作用,本文重点研究了空间域中常用的平均场值法、向上延拓法、圆周法、趋势分析法等四种方法的基本原理,通过模型试验对比分析了不同方法的场分离效果,并将四种方法应用到了相山布格重力异常的分离之中.模型试验及实例应用表明,平均场值法和圆周法的场分离效果较为理想,但圆周法分离出的区域场存在局部波动现象;向上延拓法难以将区域异常和局部异常彻底分离;趋势分析法分离出的局部场中含有明显的虚假异常.因此,就这四种场分离方法而言,选择平均场值法具有更好的实际应用价值.
Potential field separation plays an important role in the data processing and interpretation of gravity and magnetic exploration. In this paper we focus on the mean-field method,upward continuation,circumference law method and trend analysis.Compared and analyzed on the field separation results of different methods using three model tests, and the four field separation methods are applied in bouguer gravity data of Xiangshan orefield.The combined model tests and the application show that the meanfield method and circumference law method can obtain better results than the other two methods,but there has local fluctuation using circumference law method. The upward continuation cannot completely separate the regional and residual field,and the residual field has false anomaly using the trend analysis. Therefore,the mean-field method can obtain better results in the real data processing when it is compared with the other three methods mentioned in this paper.
Potential field separation plays an important role in the data processing and interpretation of gravity and magnetic exploration. In this paper we focus on the mean-field method,upward continuation,circumference law method and trend analysis.Compared and analyzed on the field separation results of different methods using three model tests, and the four field separation methods are applied in bouguer gravity data of Xiangshan orefield.The combined model tests and the application show that the meanfield method and circumference law method can obtain better results than the other two methods,but there has local fluctuation using circumference law method. The upward continuation cannot completely separate the regional and residual field,and the residual field has false anomaly using the trend analysis. Therefore,the mean-field method can obtain better results in the real data processing when it is compared with the other three methods mentioned in this paper.
引文
Chen Y.2014.Study on geophysical characteristics and deep geological structures of the Xiangshan uranium orefield(in Chinese)[Ph.D.thesis].Beijing:CNNC Beijing Research Institute of Uranium Geology.
Guan Z N.2005.Geomagnetic Field and Magnetic Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Hou Z Z,Yang W C.1997.Wavelet transform and multi-scale analysis on gravity anomalies of China[J].Acta Geophysica Sinica(in Chinese),40(1):85-95.
Jiao X H,Wu Y G.2009.Gravity and Magnetic Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Li Q C,Pan Z S,Li J L.1994.Order-variant sliding trend analysis and its application[J].Geophysical Prospecting for Petroleum(in Chinese),33(3):92-98.
Liang J W.2001.A physical interpretation of wavelet analysis for potential fields[J].Chinese Journal of Geophysics(in Chinese),44(6):865-870,doi:10.3321/j.issn:0001-5733.2001.06.016.
Liu Q S,Wang B R.1996.Vertical separation of potential field by using multiple matched-filter[J].Computing Techniques for Geophysical and Geochemical Exploration(in Chinese),18(4):279-286.
Spector A,Grant F S.1970.Statistical models for interpreting aeromagnetic data[J].Geophysics,35(2):293-302.
Wen B H,Cheng F D.1990.A new interpolating cut method for identifying regional and local fields of magnetic anomaly[J].Journal of Central South University(in Chinese),21(3):229-235.
Wu Z C,Guo F S,Xie C F,et al.2013.The ore prognosis and gravity and magnet slope anomaly extraction in the Xiangshan uraniumpolymetallic Orefield,Jiangxi province[J].Geophysical and Geochemical Exploration(in Chinese),37(3):453-460.
Xiong G C.2000.Self-adjusting tendency analysis[J].Geophysical and Geochemical Exploration(in Chinese),24(4):268-277.
Zeng H L.2005.Gravity Field and Gravity Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Zhang F X,Zhang F Q,Liu C,et al.2006.Using matched filtering method based on cosine transform to separate gravitational and magnetic a-nomaly[J].Oil Geophysical Prospecting(in Chinese),41(2):216-220,225.
Zhou W N,Zeng Z F,Du X J,et al.2010.Gravity anomaly separation based on empirical mode decomposition[J].Global Geology(in Chinese),29(3):495-502.
陈越.2014.相山铀矿田地球物理特征及深部地质结构研究[博士论文].北京:核工业北京地质研究院.
管志宁.2005.地磁场与磁力勘探[M].北京:地质出版社.
侯遵泽,杨文采.1997.中国重力异常的小波变换与多尺度分析[J].地球物理学报,40(1):85-95.
焦新华,吴燕冈.2009.重力与磁法勘探[M].北京:地质出版社.
李庆春,潘作枢,李九亮.1994.变阶数滑动趋势分析及其应用[J].石油物探,33(3):92-98.
梁锦文.2001.位场小波分析的物理解释[J].地球物理学报,44(6):865-870,doi:10.3321/j.issn:0001-5733.2001.06.016.
刘青松,王宝仁.1996.应用多次匹配滤波技术进行垂向位场分离[J].物探化探计算技术,18(4):279-286.
文百红,程方道.1990.用于划分磁异常的新方法-插值切割法[J].中南矿冶学院学报,21(3):229-235.
吴志春,郭福生,谢财富,等.2013.江西省相山铀多金属矿田重磁坡度异常提取与成矿预测[J].物探与化探,37(3):453-460.
熊光楚.2000.自调节趋势分析法[J].物探与化探,24(4):268-277.
曾华霖.2005.重力场与重力勘探[M].北京:地质出版社.
张凤旭,张凤琴,刘财,等.2006.基于余弦变换的匹配滤波方法分离重磁异常[J].石油地球物理勘探,41(2):216-220,225.
周文纳,曾昭发,杜晓娟,等.2010.基于经验模态分解的重力异常分离[J].世界地质,29(3):495-502.
Guan Z N.2005.Geomagnetic Field and Magnetic Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Hou Z Z,Yang W C.1997.Wavelet transform and multi-scale analysis on gravity anomalies of China[J].Acta Geophysica Sinica(in Chinese),40(1):85-95.
Jiao X H,Wu Y G.2009.Gravity and Magnetic Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Li Q C,Pan Z S,Li J L.1994.Order-variant sliding trend analysis and its application[J].Geophysical Prospecting for Petroleum(in Chinese),33(3):92-98.
Liang J W.2001.A physical interpretation of wavelet analysis for potential fields[J].Chinese Journal of Geophysics(in Chinese),44(6):865-870,doi:10.3321/j.issn:0001-5733.2001.06.016.
Liu Q S,Wang B R.1996.Vertical separation of potential field by using multiple matched-filter[J].Computing Techniques for Geophysical and Geochemical Exploration(in Chinese),18(4):279-286.
Spector A,Grant F S.1970.Statistical models for interpreting aeromagnetic data[J].Geophysics,35(2):293-302.
Wen B H,Cheng F D.1990.A new interpolating cut method for identifying regional and local fields of magnetic anomaly[J].Journal of Central South University(in Chinese),21(3):229-235.
Wu Z C,Guo F S,Xie C F,et al.2013.The ore prognosis and gravity and magnet slope anomaly extraction in the Xiangshan uraniumpolymetallic Orefield,Jiangxi province[J].Geophysical and Geochemical Exploration(in Chinese),37(3):453-460.
Xiong G C.2000.Self-adjusting tendency analysis[J].Geophysical and Geochemical Exploration(in Chinese),24(4):268-277.
Zeng H L.2005.Gravity Field and Gravity Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Zhang F X,Zhang F Q,Liu C,et al.2006.Using matched filtering method based on cosine transform to separate gravitational and magnetic a-nomaly[J].Oil Geophysical Prospecting(in Chinese),41(2):216-220,225.
Zhou W N,Zeng Z F,Du X J,et al.2010.Gravity anomaly separation based on empirical mode decomposition[J].Global Geology(in Chinese),29(3):495-502.
陈越.2014.相山铀矿田地球物理特征及深部地质结构研究[博士论文].北京:核工业北京地质研究院.
管志宁.2005.地磁场与磁力勘探[M].北京:地质出版社.
侯遵泽,杨文采.1997.中国重力异常的小波变换与多尺度分析[J].地球物理学报,40(1):85-95.
焦新华,吴燕冈.2009.重力与磁法勘探[M].北京:地质出版社.
李庆春,潘作枢,李九亮.1994.变阶数滑动趋势分析及其应用[J].石油物探,33(3):92-98.
梁锦文.2001.位场小波分析的物理解释[J].地球物理学报,44(6):865-870,doi:10.3321/j.issn:0001-5733.2001.06.016.
刘青松,王宝仁.1996.应用多次匹配滤波技术进行垂向位场分离[J].物探化探计算技术,18(4):279-286.
文百红,程方道.1990.用于划分磁异常的新方法-插值切割法[J].中南矿冶学院学报,21(3):229-235.
吴志春,郭福生,谢财富,等.2013.江西省相山铀多金属矿田重磁坡度异常提取与成矿预测[J].物探与化探,37(3):453-460.
熊光楚.2000.自调节趋势分析法[J].物探与化探,24(4):268-277.
曾华霖.2005.重力场与重力勘探[M].北京:地质出版社.
张凤旭,张凤琴,刘财,等.2006.基于余弦变换的匹配滤波方法分离重磁异常[J].石油地球物理勘探,41(2):216-220,225.
周文纳,曾昭发,杜晓娟,等.2010.基于经验模态分解的重力异常分离[J].世界地质,29(3):495-502.