The research on the prediction of gravity and magnetic anomalies and deep magnetite target areas in the Neihuang-Xunxian area of Henan Province
Hao SONG1,2,3, Yi-Mi ZHANG2,3, Wan-Yin WANG2,3
1. Aerogeophysical and Remote Sensing Center of Henan Province,Zhengzhou 450053,China 2. Institute of Gravity and Magnetic Technology,Chang’an University, Xi’an 710054,China 3. College of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054,China
The Neihuang-Xunxian area in Henan Province is located in the Archaean basement uplift area, and has good gravity and magnetic anomalies. It has favorable conditions in the search for sedimentary metamorphic magnetite deposits. However, since the 1970s, due to the limitations of shallow prospecting knowledge, no breakthrough has been made in prospecting. Aimed at the target area of deep magnetite prospecting, the authors detected the plane position (center and boundary) of the concealed magnets in the study area by central recognition technology (analytical signal amplitude ASM) and edge recognition technology (NVDR-THDR), obtained the burial information of the concealed magnets in the study area by Euler deconvolution, and analyzed the homologous characteristics of gravity and magnetic anomalies in the study area by correlation coefficient. Combined with known boreholes, 2.5D fitting inversion of key magnetic anomalies in the study area was carried out, and the scale and spatial distribution characteristics of the concealed magnets were determined. The results show that the buried depth of the concealed magnets corresponding to the main magnetic anomalies is 500~1 200 m, and the ore-bearing property in the deep part is better than that in the shallow part, so the prospecting potential in the deep part is great. On the basis of comprehensive geological and mineral conditions, two deep prospecting target areas of Wagang-Yujian and Nanzhangbao magnetite ores were delineated. It is suggested that they should be the key directions in further deep prospecting with the purpose of achieving a breakthrough in deep prospecting in this area as soon as possible.
宋豪, 张义蜜, 王万银. 河南内黄—浚县一带重磁异常与深部磁铁矿靶区预测研究[J]. 物探与化探, 2019, 43(6): 1191-1204.
Hao SONG, Yi-Mi ZHANG, Wan-Yin WANG. The research on the prediction of gravity and magnetic anomalies and deep magnetite target areas in the Neihuang-Xunxian area of Henan Province. Geophysical and Geochemical Exploration, 2019, 43(6): 1191-1204.
Zhao H J, Gong J J, Xu Z Y , et al. Application of gravity and magnetic inversion in Makou Iron Mine[J]. West-China Exploration Engineering, 2017,29(5):138-142.
Li H, Yu J B, Lyu H , et al. Gravity and aeromagnetic responses and heat-controlling structures of Xiongxian geothermal area[J]. Geophysical and Geochemical Exploration, 2017,41(2):242-248.
[3]
邢琮琮 . 重磁数据处理在青海恰卜恰地区的应用研究[D]. 长春:吉林大学, 2017.
[3]
Xing C C . The application research of gravity and magnetic data processing in Qiabuqia area of Qinghai province[D]. Changchun:Jilin University, 2017.
Zhang C G, Yuan B Q, LI Y H , et al. Distribution of Helium resources in Weihe basin based on gravity and magnetic data[J]. Progress in Geophysics, 2017,32(1):344-349.
Han B, Zhang X H, Tian Z X . Study of the deep structures features in the East China Sea using the gravity and magnetic anomaly field[J]. Chinese High Technology Letters, 2015,25(5):493-499.
Wang W Y, Wang Y P, Li J G , et al. Study on the faults structure and granite body distribution in Pangushan area of Yudu-Gan xian ore district using gravity and magnetic data[J]. Geophysical and Geochemical Exploration, 2014,38(4):825-834.
[7]
Mohammed J, Najib E G, Azzouz K , et al. Gravity and magnetic investigations in the Haouz basin, Morocco. Interpretation and mining implications[J]. Journal of African Earth Sciences, 2010,58(2):331-340.
[8]
Martelet G, Perrin J, Truffert C, Deparis J . Fast mapping of magnetic basement depth, structure and nature using aeromagnetic and gravity data: combined methods and their application in the Paris Basin[J]. Geophysical Prospecting, 2013,61(4):857-873.
[9]
Aboud E, EI-Masry N, Qaddah A , et al. Magnetic and gravity data analysis of Rahat volcanic field, EI-Madinah city, Saudi Arabia[J]. NRIAG Journal of Astronomy and Geophysics, 2015,4(1):154-162.
[10]
EI Sayed I S . The integration of gravity, magnetic and seismic data in delineating the sedimentary basins of northern Sinai and deducing their structural controls[J]. Journal of Asian Earth Sciences, 2016,115:345-367.
[11]
Sunaryo. Response of gravity, magnetic, and geoelectrical resistivity methods on Ngeni Southern Blitar mineralization zone[J]. Journal of Physics: Conference Series, 2018,979(1):1-9.
Zhang Z Q, Li Y P, Wang H H , et al. Large iron-rich ores were found in Qihe-Yucheng area of Shandong Province[J]. Land and Resources in Shangdong Province, 2016,32(5):94.
Zhu Y Z, 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.
Hao X Z, Yang Y H, Li Y P , et al. Magnetic anomaly characteristics and iron ore prediction of Chengwu-Caoxian county area in Shandong province,China[J]. Progress in Geophysics, 2018,33(2):613-619.
Wang Q S, Wu M A, Yuan P , et al. Characteristics of gravity and magnetic anomalies in the Nihe iron deposit of Lujiang County, Anhui Province[J]. Geology and Exploration, 2012,48(1):148-154.
Luo F, Yan J Y, Fu G M . The application of gravity and magnetic three-dimensional inversion based on known information constraint in deep magnetite exploration: A case study of the Nihe iron deposit in Anhui Province[J]. Geophysical and Geochemical Exploration, 2018,42(1):50-60.
Lu J, Li J, Bai X S , et al. Application of magnetic survey on hidden iron deposit prospecting: a case study on luanpingⅡ iron deposit in hebei province,china[J]. Journal of Jilin University:Earth Science Edition, 2008,38(4):698-702.
Zhang G L, Zhao G X, Teng F , et al. Application of the high precision gravity survey in prospeting concealed deposit in jidong iron ore peripheral coverage area[J]. Geological Survey And Research, 2014,37(1):46-51.
Zhang X L, Zhang P H, Dou X G . Summary report on the three-year achievements of henan province’s strategic action for prospecting breakthroughs [R]. Department of Land and Resources of Henan Province, 2014.
Chen T Z, Zhang M B, Sun Z X . Aeromagnetic anomaly verification report of Neihuang-Xunxian area in Henan province [R]. Geophysical Exploration Team of Henan Geological and Mineral Exploration and Development Bureau, 2011.
[21]
河南省地质矿产局. 河南省区域地质志[M]. 北京: 地质出版社, 1992.
[21]
Henan Provincial Bureau of Geology and Mineral Resources. Regional geological records of Henan Province [M]. Beijing: Geological Publishing House, 1992.
Li G, Zhang L, Zhou Y B , et al. Study of technical method on looking for coal field inside the concealed uplift area[J]. China Mining Magazine, 2014,23(9):70-75.
Zhang L, Zhang H L, Du W Y , et al. Study on geological structure of coal measures strata in Xinzhen of Xunxian and its exploration methods[J]. China Coal, 2016,42(11):30-33.
Liu W Z . Geological characteristics of coalfields in the northern section of Neihuang uplift in Henan[J]. Inner Mongolia Coal Economy, 2017 ( 10):157-158.
Wang W Y . Spatial variation law of the extremum value position of analytical signal amplitude for potential field data[J]. Chinese Journal of Geophysics, 2012,55(4):1288-1299.
Wang W Y, Qiu Z Y, Yang Y , et al. Some advances in the edge recognition of the potential field[J]. Progress in geophysics, 2010,25(1):196-210.
[27]
Wang Wanyin, Pan Yu, Qiu Zhiyun . A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J]. Applied Geophysics, 2009, 6(3):226-233+299.
[28]
Dewangan P, Ramprasad T, Ramana M V , et al. Automatic interpretation of magnetic data using Euler deconvolution with nonlinear background[J]. Pure and Applied Geophysics, 2007,164(11):2359-2372.
[29]
Majid Beiki . TSVD analysis of Euler deconvolution to improve estimating magnetic source parameters: An example from the Aseie area, Sweden[J]. Journal of Applied Geophysics, 2013: 90.
[30]
金家龙 . 水下多磁性目标的欧拉反褶积定位算法研究[D]. 哈尔滨:哈尔滨工程大学, 2014.
[30]
Jin J L . Research on multiple underwater magnetic targets localization algorithm of Euler deconvolution[D]. Harbin:Harbin University of Engineering, 2014.
[31]
Mashael M. AI-Saud . The role of aeromagnetic data analysis (using 3D Euler deconvolution) in delineating active subsurface structures in the west central Arabian shield and the central Red Sea, Saudi Arabia[J]. Arabian Journal of Geosciences, 2014 ( 10):4361-4376.
Lin W L, Fang G X, Dai Q F , et al. research of Xiangshan volcano basin based on 3D gravity and magnetic Euler deconvolution[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2015,37(2):158-163.
Jia S . The improvement of Euler deconvolution method of magnetic anomaly and its application in mining area of dapai in Yongding county in Fujian province[D]. Beijing:China University of Geosciences (Beijing), 2017.
[34]
史佳楠 . 优化欧拉反褶积法及在目标体定位中的应用[D]. 长春:吉林大学, 2018.
[34]
Shi J N . Optimization Euler’s deconvolution and its application in target positioning[D]. Changchun:Jilin University, 2018.
Zhao R M, Zhu G H, Bai G J . The application of correspondence analysis technique of gravitational and magnetic anomalies in the process of factual data, in myanmar region[J]. Progress in Geophysics, 2013,28(2):914-919.
Dou X Y, Wu Y G, Wang E L , et al. The application of correspondence analysis method of gravity and magnetic anomalies in the process of factual data, in northeast China[J]. Jilin Geology, 2010,58(2):331-340.
Liu Q K, Li J J, Xu L P , et al. The application of the satellite corresponding analysis of the magnetism-density ratio to the determination of the deep crust fractures: A case study of northeast region of Tibet[J]. Geophysical and Geochemical Exploration, 2015,39(S1):119-125.