The interpretation of surface and borehole magnetic data in the Ganzhong iron deposit, Jiangxi
WANG Sai-Xin1,2, YAN Ting-Jie1,2, ZHOU Dong-Liang3
1. Development and Research Center of China Geological Survey, Beijing 100037, China;
2. Technical Guidance Center for Mineral Resources of Ministry of Land and Resources, Beijing 100120, China;
3. Ganxi Geological Survey Party, Jiangxi Bureau of Geology and Mineral Resources, Nanchang 330201, China
Located in Xinyu City, Jiangxi Province, the Ganzhong iron deposit is a sedimentary metamorphic iron deposit. As the country rock in this area is non-magnetic, we have the base of physical properties to implement magnetic survey. The iron formation is thin and deep in this area. So far, the interpretation of the magnetic data has not achieved good results. The previous work was mainly focused on the geological exploration and drilling. In this paper, the authors first studied the status of the geological work in the study area, and then used the wavelet multi-scale decomposition method to extract the deep field anomaly. The method of tilt-angle and the Theta Map was also employed to identify the boundary of the iron formation and, as a result, five prospecting areas were delineated which have good metallogenic potential. In addition, the authors applied meticulous inversion and interpretation along No. 62 exploration line of Songshan area based on the borehole data of ZK6209 and provided a quantitative interpretation result. It is pointed out that three-component borehole magnetic survey is an effective way to find the deep iron formation. This paper provides some new ideas for the deep and peripheral prospecting in the Ganzhong iron deposit.
王赛昕, 颜廷杰, 周栋良. 赣中新余式铁矿地面和井中磁测资料综合处理解释[J]. 物探与化探, 2015, 39(3): 478-484.
WANG Sai-Xin, YAN Ting-Jie, ZHOU Dong-Liang. The interpretation of surface and borehole magnetic data in the Ganzhong iron deposit, Jiangxi. Geophysical and Geochemical Exploration, 2015, 39(3): 478-484.
[1] 曾广华,王霁晴,郑学文,等.赣中铁矿田水文地质条件及矿山地质环境评价[J].现代建设,2013,12(8):26-27.[2] 肖光荣,姚琪.江西省新余式铁矿区中深部铁矿勘查探讨[J].地学前缘,2013,20(4):305-311.[3] 肖光荣,姚琪.江西省新余市良山铁矿区中深部接替资源勘查启示[J].东华理工大学学报:自然科学版,2013,36(3):50-55.[4] Cianciara B,Marcar H. Znterpretation of gravity anomalies by means of local power spectra.Geophysics Prospecting.1975,24:273-286.[5] 刘天佑.位场勘探数据处理新方法[M].北京: 科学出版社,2007.[6] 侯遵泽,杨文采.中国重力异常的小波变换与多尺度分析.地球物理学报,1997,40(1):85-95.[7] 侯遵泽,杨文采,刘家琦.中国大陆地壳密度差异多尺度反演[J].地球物理学报,1998,41(5):651-656.[8] 杨文采,施志群,侯遵泽,等.离散小波变换与重力异常多重分解[J].地球物理学报,2001,44(4):534-541.[9] 刘天佑,吴招才,詹应林,等.磁异常小波多尺度分解及危机矿山的深部找矿:以大冶铁矿为例[J].地球科学,2007, 32(1):135-140.[10] 刘天佑,刘大为,詹应林,等. 磁测资料处理新方法及在危机矿山挖潜中的应用[J].物探与化探,2006,30(5):377-381.[11] 朱朝吉,周肇武,张恒磊,等.小波多尺度分解方法在尕林格Ⅱ矿群深部找矿中的应用[J].地质科技情报,2011,30(1):71-75.[12] Miller H G,Singh V.Semiquantitative techniques for the removal of directional trends from potential field data [J].Journal of Applied Geophysics,1994,32:199-211.[13] Miller H G,Singh V.Potential field tilt-a new concept for location of potential field sources [J].Journal of Applied Geophysics,1994,32:213-217.[14] Salem A,Smith R.Generalized magnetic tilt-Euler deconvolution[C].SEG 77th Annual Meeting Expanded Abstracts,2007:790-794.[15] Salem A,Williams S,et al.Interpretation of magnetic data using tilt-angle derivatives [J].Geophysics,2007,73:L1-L10.[16] Wijns C,Perez C,Kowalczyk P.Theta map:Edge detection in magnetic data [J].Geophysics,2005,70(4):L39-L43.[17] Joao B C,Silva Gerald W Hohmann.Interpretation of three-component borehole magnetic data. Geophysics,1981,46(12):1721-1731.[18] 刘天佑,高文利,冯杰,等.井中三分量磁测的梯度张量欧拉反褶积及应用 [J].物探与化探,2013, 37(4): 633-639.[19] 王庆乙,李学圣,徐立忠.高精度井中三分量磁测是矿山深部找矿的有效手段 [J].物探与化探,2009,33(3):235-239.[20] 颜廷杰,朱谷昌.井中磁测在矿区找矿中的应用效果及经验[J].矿产勘查,2011,2(6):789-794.[21] 古端龙.在井中磁测工作中利用水平模差找盲矿[J].地质科技情报,1984,2:137-143.[22] 刘冬节.利用井中三分量磁测异常垂直分量及水平分量模差对旁侧异常进行二维拟合计算推断解释 [J].物探与化探,2011,35(5):617-619.[23] 刘双,张大莲,刘天佑,等.井地磁测资料联合反演及应用[J].地质与勘探,2008,44(6):69-72.