双频激电法在坦桑尼亚汉德尼金矿勘查中的应用
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摘要
汉德尼(Handeni)金矿是近年来在坦桑尼亚绿岩带中发现的大型金矿床,矿区地形复杂、植被繁茂,物性测试显示含金的硫化物地质体具有高极化的特征。双频激电法具有受电流变化影响小、设备轻便等优点。文章主要阐述了双频激电法在该矿区的应用,通过对视幅频率的数据处理,综合分析双频激电平面、剖面和测深断面异常特征,查明矿(化)体的赋存部位、分布规模等,进一步明确找矿范围。
The Handeni gold deposit is a large-sized deposit recently discovered in Proterozoic greenstone belt in Tanzania.The deposit area has a complex topography which is filled with dense vegetation.The physical property testing shows that gold-bearing sulfide rock mass has characteristics of high polarization.The dual frequency induced polarization method is adaptive to this area for advantages of light weight and its slightly subjected to the change of current intensity.In this paper,the application of the dual frequency induced polarization method is discussed.The survey data is processed in apparent amplitude frequency plane.Meanwhile,the ore features in apparent amplitude frequency plane for both dual frequency IP intermediate gradient and IP sounding methods are summarized,these features are critical for identifying prospecting area and locating the occurrence position of gold ore bodies.
The Handeni gold deposit is a large-sized deposit recently discovered in Proterozoic greenstone belt in Tanzania.The deposit area has a complex topography which is filled with dense vegetation.The physical property testing shows that gold-bearing sulfide rock mass has characteristics of high polarization.The dual frequency induced polarization method is adaptive to this area for advantages of light weight and its slightly subjected to the change of current intensity.In this paper,the application of the dual frequency induced polarization method is discussed.The survey data is processed in apparent amplitude frequency plane.Meanwhile,the ore features in apparent amplitude frequency plane for both dual frequency IP intermediate gradient and IP sounding methods are summarized,these features are critical for identifying prospecting area and locating the occurrence position of gold ore bodies.
引文
[1]张赛珍,王庆乙,罗延钟.中国电法勘探发展概况[J].地球物理学报,1994,37(S1):408-424.
[2]何继善.双频道交流激发极化法初步研究[J].中南矿冶学院学报,1978,9(2):1-11.
[3]何继善,鲍光淑.论双频道幅频法的电流波形[J].中南矿冶学院学报,1981,12(2):29-37.
[4]何继善,鲍光淑.双频道幅频观测的异常[J].中南矿冶学院学报,1982,6(2):49-54.
[5]何继善,鲍光淑.频率域激发极化法中的双频道幅频观测[J].物探与化探,1983,7(3):182-192.
[6]何继善.双频激电法[M].北京:高等教育出版社,2006.
[7]柳建新,刘春明,佟铁钢,等.双频激电法在西藏某铜多金属矿带的应用[J].地质与勘探,2004,40(2):59-61.
[8]武炜,张宝林,梁光河,等.双频激电法在我国西部两类典型覆盖区金属矿体预测中的应用[J].地质与勘探,2009,45(6):669-675.
[9]白宜诚,佟铁钢,罗维斌,等.双频道激电法在我国西部特殊地貌景观条件下的应用[J].矿产与地质,2005,19(1):71-76.
[10]刘军,朱谷昌.坦桑尼亚汉德尼金矿床地质特征与找矿方向分析[J].地质与勘探,2012,(1):179-186.
[2]何继善.双频道交流激发极化法初步研究[J].中南矿冶学院学报,1978,9(2):1-11.
[3]何继善,鲍光淑.论双频道幅频法的电流波形[J].中南矿冶学院学报,1981,12(2):29-37.
[4]何继善,鲍光淑.双频道幅频观测的异常[J].中南矿冶学院学报,1982,6(2):49-54.
[5]何继善,鲍光淑.频率域激发极化法中的双频道幅频观测[J].物探与化探,1983,7(3):182-192.
[6]何继善.双频激电法[M].北京:高等教育出版社,2006.
[7]柳建新,刘春明,佟铁钢,等.双频激电法在西藏某铜多金属矿带的应用[J].地质与勘探,2004,40(2):59-61.
[8]武炜,张宝林,梁光河,等.双频激电法在我国西部两类典型覆盖区金属矿体预测中的应用[J].地质与勘探,2009,45(6):669-675.
[9]白宜诚,佟铁钢,罗维斌,等.双频道激电法在我国西部特殊地貌景观条件下的应用[J].矿产与地质,2005,19(1):71-76.
[10]刘军,朱谷昌.坦桑尼亚汉德尼金矿床地质特征与找矿方向分析[J].地质与勘探,2012,(1):179-186.