Deep mineral exploration by airborne and ground natural field electromagnetic methods
ZHAO Cong1,2,3, ZHU Lin1,2, LI Huai-Yuan1,2, JIANG Min-Zhong1,2, LUO Yan1,2, ZHANG Wei1,2,3, HE Xin-Xin1,2
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002, China;
2. Key Laboratory of Uranium Resources Geophysical Exploration Technology, China Nuclear Industry Group Company, Shijiazhuang 050002, China;
3. College of Nuclear Engineering and Geophysics, East China Institute of Technology, Fuzhou 344000, China
This paper describes the theory, equipment and applications of airborne natural electromagnetic system (ZTEM) and comparatively summarizes the measuring parameters, exploration results and working efficiency of both airborne natural EM and ground MT methods. The local-regional exploration scheme of combining airborne EM and ground MT method is proposed based on the above discussion. The ZTEM system is used for rapid survey in large area, thus ground MT is used to follow up the interested points in accessible area and provide a reference for data inversion of a ZTEM survey so as to ensure that the final exploration results truly represent the geological bodies in the whole area. It can provide advanced technologies for rapid and effective exploration in high mountainous, forest-cover, water-cover and environmental protection areas in China.
赵丛, 朱琳, 李怀渊, 江民忠, 骆燕, 张伟, 何昕欣. 航空和地面天然场电磁法联合开展深部矿产资源勘探[J]. 物探与化探, 2016, 40(2): 333-341.
ZHAO Cong, ZHU Lin, LI Huai-Yuan, JIANG Min-Zhong, LUO Yan, ZHANG Wei, HE Xin-Xin. Deep mineral exploration by airborne and ground natural field electromagnetic methods. Geophysical and Geochemical Exploration, 2016, 40(2): 333-341.
[1] 席振铢.人工源频率倾子测深法.长沙:中南大学,2013.[2] 甘佳雄. MT倾子响应的有限元模拟及影响因素分析.长沙:中南大学,2012.[3] 吴頔,严家斌,贺文根. 倾子对异常体的分辨能力及影响因素研究[J].地球物理学进展,2012,27(6):2656-2663.[4] 胡文宝,苏朱刘,陈清礼,等. 倾子资料的特征及应用[J].石油地球物理勘探,1997,32(2):202-212.[5] 徐凌华,甘佳雄,柳建新,等. MT倾子响应的影响因素分析[J].物探化探计算技术,2013,35(4):430-434.[6] 陈小斌,赵国泽,詹艳,等.磁倾子矢量的图示分析及其应用研究[J].地学前缘,2004,11(4):626-636.[7] 余年,王绪本,阚瑷珂,等.倾子和视倾子的研究及在断裂解释中的应用[J].工程地球物理学报,2007,4(4):275-281.[8] 陈军营,林长佑,王书明,等.电偶源频率电磁测深视电阻率多参量联合反演效果检验[J].西北地震学报,2001,23(3):279-285.[9] Geotech Ltd. ZTEM Tipper AFMAG results over Mt. Milligan Copper-Gold porphyry deposit.Canada,2009.[10] Pascal P, Jean M L. Ground IP-Resistivity, and airborne Spectrem and helicopter ZTEM survey results over Pebble copper-moly-gold porphyry deposit, Alaska//SEG Denver 2010 Annual Meeting,2010.[11] Carlos I, Jean L, Cristiano F. ZTEM airborne Tipper AFMAG results over the Copaquire Porphyry, northern Chile//SBGf -Sociedade Brasileira de Geofísica.The 12th International Congress of the Brazilian Geophysical Society,2011.[12] Brian K Janes. 金属分带在斑岩铜矿体系金勘探中的应用[J].国外火山地质,1993,38(2):67-77.[13] Geotech Ltd. Report on a helicopter-borne Z-Axis tipper electromagmetic(ZTEM) and Aeromagnetic geophysical survey . Ontario,Canada, 2015.[14] Juliane H, Martyn U. Characterizing porphyry Cu-deposits with airborne ZTEM and ground MT data.2014.[15] Wannamaker P E, Legault J M. ZTMT2DIV:Two-dimensional joint inversion of ZTEM and MT plane-wave EM data including topography .2014.
