1. Shandong Coalfield Geological Planning and Investigation Institute, Jinan 250104,China 2. School of Earth Sciences and Information Physics, Central South University, Changsha 410083, China 3. China Aerospace Geophysical and Remote Sensing Center, Beijing 100083, China
The search for deep buried iron deposits is a very complicated exploratory study. The current difficulty is that the ferromagnetic anomalies are small and submerged in large magnetic intrusive rock masses. It may cause large deviations and increase the risk of exploration. With the rapid development of computer technology, large-scale three-dimensional inversion has become a reality. This paper uses GMES-3DI commercialization software to automatically invert the area magnetic data of Qihe-Yucheng area in Shandong Province, and obtains the magnetic susceptibility of underground space in this area. Based on the distribution and combined with the existing geological data of boreholes, the authors revealed the characteristics of the magnetic susceptibility contours with high value traps in the presence of iron ore, with the trap center being about 500 m shallower than the actual orebody position. Based on this feature, the authors used the three-dimensional magnetic susceptibility data retrieved from the exploration area to search for areas with high magnetic anomaly traps in the north-south and east-west directions and, as a result, delineated two relatively reliable prospecting targets.
朱裕振, 强建科, 王林飞, 张文艳, 戴世坤. 深埋铁矿磁测数据三维反演分析与找矿靶区预测[J]. 物探与化探, 2019, 43(6): 1182-1190.
Yu-Zhen ZHU, Jian-Ke QIANG, Lin-Fei WANG, Wen-Yan ZHANG, Shi-Kun DAI. Three-dimensional inversion analysis of magnetic data from deep buried iron ore and prediction of prospecting target area. Geophysical and Geochemical Exploration, 2019, 43(6): 1182-1190.
Li H M, Wang R J, Xiao K Y , et al. Feasibility analysis of ensuring iron demand mainly by domestic resources[J]. Geological Bulletin of China, 2010,29(1):1-7.
Teng J W, Yang L Q, Yao J Q , et al. Deep disscover ore、exploration and exploitation for metal mineral resocrces and its deep dynamical process of formation[J]. Progress in Geophysics, 2007,22(2):317-334.
Xiong S Q, Yu C C, Wang W P , et al. Large scale aero geophysical survey with helicopter and its application to deep ore prospecting[J]. Advances in earth science, 2008,23(3):270-274.
Xiong G C . Some problems concerning the transformation of gravity and magnetic anomalies in prognosis of ore resources[J]. Geophysical & geochemical exploration, 1992,16(5):358-364.
Li Q Y, Wang Y M, Deng S L . The ground magnetic anomaly characteristics of the Altun Mountain Liweiqi-ming hidden iron ore deposit in Ruoqiang county, Xinjiang Uygur autonomous region[J]. Geophysical & Geochemical Exploration, 2010,34(3):286-288.
Sun R H, Zhang Y, Li W R . On application of magnetic prospecting on earth surface finding iron mine in Liaoning Jianping Daheishan area[J]. Geology of chemical minerals, 2012,34(3):178-182.
Huang L P, Guan Z N . The determination of magnetic causative boundaries using total gradient modules of magnetic anomalies[J]. Journal of East China Geological Institute, 1998,21(2):143-150.
[10]
张陶 . 二度体磁异常总梯度模反演与应用[D]. 成都:成都理工大学, 2011.
[10]
Zhang T . Dimensional magnetic anomaly inversion and application of the total gradient mode[D]. Chengdu: Chengdu University of Technology, 2011.
[11]
孟慧 . 磁梯度张量正演、延拓、数据解释方法研究[D]. 长春:吉林大学, 2012.
[11]
Meng H . Forward modeling, continuation and data Interpretation of magnetic gradient tensor[D]. Changchun: Jilin University, 2012.
[12]
牟启博 . 磁异常转换模量(MMTs)的特征及应用[D]. 南昌:东华理工大学, 2013.
[12]
Mou Q B . The magnitude magnetic transform(MMTs)’s characteristics and application[D]. Nanchang: East China Institute of Technology, 2013.
Guan Z N, Liu T Y . Optimal inversion method in frequency domain of two-dimensional magnetic anomalies[J]. Geophysical and Geochemical Prospecting Computing Technology, 1985,7(4):300-309.
[14]
程方道, 王国祥 . 重磁位场波谱理论及其应用[M]. 长沙: 中南工业大学出版社, 1987.
[14]
Cheng F D, Wang G X. Gravity and magnetic potential field spectroscopy theory and its application [M]. Changsha: Central South University of Technology Press, 1987.
[15]
管志宁 . 地磁场与磁力勘探[M]. 北京: 地质出版社, 2005.
[15]
Guan Z N. Geomagnetic field and magnetic exploration [M]. Beijing: Geological Publishing Press, 2005.
Yao C L, Hao T Y, Guang Z N . Restrictions in gravity and magnetic inversions and technical strategy of 3D properties inversion[J]. Geophysical & Geochemical Exploration, 2002,26(4):253-257
Zhang H, Li S F . The application of magnetic anomaly inver sion system: taking Nickel Mine in Sunitezuoqi surveying for example[J]. Mineral Engineering Research, 2010,25(1):45-48.
Lei W M, Wu J S . Inversion and interpretation of magnetic anomalies at northeastern margin basement of the South China Sea[J]. Journal of Tongji University: Natural Science, 2012,40(11):1125-1129.
Liu T Y . The effects of using high-precision gravity and magnetic methods to explore chromite in the Xiugou iron deposit, Langxian County, Tibet[J]. Geophysical and Geochemical Exploration, 2012,36(3):325-331.
Lan X Y, Du J G, Yan J Y , et al. 3D gravity and magnetic interactive inversion modeling based on prior information: a case study of the Tongling ore concentration area[J]. Chinese Journal Geophys., 2015,58(12):4436-4449.
Zhou Z Y, Chang S S, Ning Y L , et al. The application of 2.5D human-computer interaction inversion to aeromagnetic anomaly interpretation[J]. Geophysical and Geochemical Exploration, 2016,40(6):1232-1236.
Zhu Y Y, Zhou M L, Gao Z J , et al. The discovery of the Qihe-Yucheng skarn type rich iron deposit in Shandong and its exploration significance[J]. Geological Bulletin of China, 2018,37(5):938-944.
