Research on the application of the integrated gravity-magnetic-radioactive geophysical exploration method in the exploration of rare earth deposit in Weishan, western Shandong
LAN Jun1,2(), LI Zhao-Ling1,2, ZHANG Peng1,2, LI Zhi-Min1,2, LI De-Jian3, XING Nan1,2(), SUN Li4,5, YANG Yun-Tao1,2, XU Hong-Yan1,2, WANG Jian1,2, WANG Qiao-Yun6
1. No.5 Geological Team,Shandong Provincial Bureau of Geology and Mineral Resources, Tai'an 271000, China 2. Academician Workstation for Mineralization Research and Exploration of Rare Earth Element Deposits of Shandong Province, Tai'an 271000, China 3. Shandong Weishan Lake Rare Earth Co., Ltd., Jining 277600, China 4. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037,China 5. Key Laboratory of Mineralization and Resource Evaluation, Ministry of Natural Resources, Beijing 100037, China 6. Shandong Institute of Geological Survey, Jinan 250014,China
Since the periphery of the Xishan rare earth deposit in Weishan County, western Shandong is mostly covered by the Quaternary strata, single geophysical exploration methods are ineffective in searching for rare earth elements in this area. To establish a geological-geophysical prospecting model for deep rare earth prospecting in this area, a combination of exploration techniques and methods suitable for the deep exploration of rare earth deposits in this area were selected through multiple geophysical exploration technology experiments on the known geological profiles. The distribution range of the underground Mesozoic Xishan alkaline complex was roughly determined through gravity survey and high-precision magnetic survey. The ore body outcrop was delineated through ground-based gamma spectrometry, and the deep ore body characteristics were revealed through drilling. Finally, this study developed an integrated geophysical exploration method including gravity-magnetic joint delineation of rock masses, radioactive positioning for ore body outcrops, and deep drilling. By using this exploration model, one super-large rare earth deposit was discovered in this area, providing a reference for the exploration of rare earth deposits in the surrounding area.
Jun LAN,Zhao-Ling LI,Peng ZHANG, et al. Research on the application of the integrated gravity-magnetic-radioactive geophysical exploration method in the exploration of rare earth deposit in Weishan, western Shandong[J]. Geophysical and Geochemical Exploration,
2023, 47(6): 1417-1424.
Plate tectonic location map of the research area(a) and regional geological map of the western Shandong[12] 1—Precambrian basement; 2—Paleozoic strata; 3—Mesozoic strata; 4—Cenozoic strata; 5—Mesozoic igneous rock; 6—fault; 7—Weishan rare earth
Regional geological map of Xishan area 1—Quaternary system; 2—late Mesozoic Yanshan Xishan alkaline complex; 3—Neoarchean intrusive rock; 4—carbonate vein containing rare earth quartz barite; 5—vein type ore body; 6—fine vein disseminated ore body; 7—fault; 8—survey line profile and number; 9—geological geophysical model profile; 10—comprehensive geophysical measurement range
Ore type of Xishan rare earth ore a、b—carbonate vein containing rare earth quartz barite; c、d—veined disseminated ore
Gravity anomaly of Xishan area
Magnetic anomaly of Xishan area
项目
w(U)/10-6
w(Th)/10-6
w(总道Ur)/10-6
背景值
2.4
12.4
15.1
异常下限值
4.6
24.0
21.7
Statistical table of the lower limit of radioactive element anomalies in Xishan area
Thorium element distribution of Xishan area
Uranium element distribution of Xishan area
γ total energy spectrum distribution of Xishan area
Lan J. Study on metallogenic of rare earth deposit in the Xishan Area of Weishan County in Shandong Province[J]. Shandong Land and Resources, 2019, 35 (6):39-43.
Liu J J, Zhang P, Lan J, et al. Fluid inclusions of rare earth deposits characteristics and metallogenic conditions in Hujiazhuang area in Laiwu City of Shandong Province[J]. Shandong Land and Resources, 2019, 35(1):14-18.
Wang D H, Wang R J, Sun Y, et al. Summary of research results on the investigation of rare and rare earth mineral resources in China[J]. Acta Geoscientica Sinica, 2016, 37(5):569-580.
Yu X F, Tang H S, Han Z Z, et al Geological characteristics and genesis of rare earth deposits related to alkaline rocks in the Xishan Longbaoshan area of Shandong Province[J]. Acta Geoscientica Sinica, 2010, 84 (3):407-417.
Wu F Y, Xu Y G, Gao S,et al The main academic debate on the study of lithospheric thinning and cratonic failure in North China[J]. Acta Petrologica Sinica, 2008, 24:1145-1174.
Zhang Y F, Zhang P, Liu J J, et al. New progress in exploration and research of the Xishan endophytic light rare earth deposit in Weishan County,Shandong Province[J]. Shandong Land and Resources, 2022, 38(1):19-25.
Zhang P, Lan J. Preliminary study on the characteristics and prospecting direction of rare earth mineral resources in Shandong Province[J]. Shandong Land and Resources, 2020, 36 (12):13-18.
Zhang P, Lan J. Discussion on the metallogenic model and genesis of rare earth deposits in the Western Shandong Region[J]. Shandong Land and Resources, 2020, 36(3):15-19.
Lan J, Fu R X, Zhang P, et al. The geochemical feature and its implication of the quartz syenite from the Xishan REE deposit in western Shandong[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2023, 62(3):47-56.
Lan J, Zhang P, Sun L, et al. The classification of metallogenic series and new breakthroughs in prospecting of rare earth deposits in the Western Shandong Region[J]. Acta Geoscientica Sinica, 2023, 44(5):933-942.
Zhang P, Liu S S, Lan J, et al. Isotope chronology,petrogeochemistry and genesis of the Xishan Rare Earth Deposit in Weishan County,Shandong Province[J]. Journal of Guilin University of Technology, 2023, 43(3):364-377.
Jin Z K, Liu Z R, Shi Z Z. Types of fault structures and their formation mechanisms in the western Shandong region[J]. Journal of Petroleum University:Natural Science Edition, 1999, 23(5):1-5.
Zhang P, Liu S S, Lan J, et al. New progress in metallogenic chronology of the Xishan Rare Earth Deposit in Weishan County,Shandong Province[J/OL]. Geological Science and Technology Bulletin:1-11 [2023-03-21] https://doi.org/10.19509/j.cnki.dzkq.2022.0265.
Bai D S, Yang H H, Z R, et al. The application of comprehensive methods of geology,physics,and chemistry in the exploration of ore deposits in the southern edge of the Xiaohe rock mass in western Henan[J]. Geophysical and Geochemical Exploration, 2017, 41 (5):794-801.
Yao T, Zhou Y, Du Z J, et al. The application of comprehensive methods of geology,physics,and chemistry in the exploration of Bogutou gold mine[J]. Geophysical and Chemical Exploration, 2015, 39 (5):877-884.
Liu H, Cheng J X, Yao S C,et al The application of integrated electrical and magnetic methods in the exploration of hard rock type uranium deposits in southern China[J]. Geophysical and Chemical Exploration, 2011, 35 (6):739-742,746.
Zou A, Zhao F Q, Song J J,et al Research on the metallogenic regularity and prospecting prediction of rare earth deposits in the Xuecheng Area of Zaozhuang,Shandong Province[J]. Shandong Land and Resources, 2018, 34 (02):1-7.
Li J K, Yuan Z X, Bai G,et al The evolution of ore-forming fluids and their constraints on mineralization in the Weishan rare earth deposit,Shandong[J]. Journal of Mineralogy and Petrology, 2009, 29 (3):60-68.
Yuan X S. Original display shun study on rare earth mineralogy of Weishan rare earth deposit in Shandong Province[J]. Mineral Exploration, 2019, 10 (9):2229-2242.
Bi B K, Chang Y Z, Shi Q, et al. The application of comprehensive geophysical exploration in the exploration of silver polymetallic deposits in shallow covered areas in the eastern part of Xiaoshan[J]. Geophysical and Geochemical Exploration, 2019, 43(5):976-985.
Wang M D, Ma JQ. High precision magnetic anomaly characteristics and ore prospecting prediction in Xunhua area,Qinghai[J]. Geophysical and Chemical Exploration, 2018, 42(3):491-498.
Wang R, Li Z L, Ma T. The application of radioactive measurement methods in the exploration of rare earth mines——Taking a uranium anomaly point in the Nancha District of the Xiaoxing'anling Area as an example[J]. Geophysical and geochemical exploration, 2022, 46 (4):854-861.
Cheng L Q, Zhang W Y, Wang K, et al. Application of multi-channel energy spectrum measurement in the exploration of granite type rare metal deposits in eastern Hebei[J]. Geophysical and Geochemical Exploration, 2021, 45(4):942-950.
Cao Q Y, Shan Y, Zhang E, et al. Research on the application of ground gamma energy spectrum measurement in uranium exploration——Taking the Moshishan Area of Jiayin County,Heilongjiang Province as an Example[J]. Geophysical and Chemical Exploration, 2016, 40(4):701-704.
Lan J, Zhang P, Xing N, et al. Isotopic characteristics and source indication of ore-forming materials of the Weishan magnetic type tombarthite deposit in western Shandong[J], Geology and Exploration, 2023, 59(4):747-759.