A comprehensive comparative study of geological characteristics as well as aeromagnetic and aeroradiometric features of the Bayan Obo REE-Nb-Fe depoits and their implications for prospecting work

WANG Ji-chun; SONG Chong-yu; WANG Zhi-li; ZHOU Lu-lu; ZHANG Zhan-fei; HU Qiao-e

GEOLOGY IN CHINA > 2016 > 43(2): 594-606.

WANG Ji-chun, SONG Chong-yu, WANG Zhi-li, ZHOU Lu-lu, ZHANG Zhan-fei, HU Qiao-e. A comprehensive comparative study of geological characteristics as well as aeromagnetic and aeroradiometric features of the Bayan Obo REE-Nb-Fe depoits and their implications for prospecting work[J]. GEOLOGY IN CHINA, 2016, 43(2): 594-606.

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A comprehensive comparative study of geological characteristics as well as aeromagnetic and aeroradiometric features of the Bayan Obo REE-Nb-Fe depoits and their implications for prospecting work

1. China University of Geosciences, Beijing 100083, China;
2. Institute of Geological Survey of Inner Mongolia, Huhhot 010020, Inner Mongolia, China;
3. General Institute of Chemical Geology Survey, China Chemical Geology and Mine Bureau, Beijing 100120, China

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Supported by China Geological Survey Program (No. 1212011220468) and Inner Mongolia Geological Exploration Fund (08-2-HK01).

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Received Date: January 10, 2015
Revised Date: February 12, 2015
Available Online: September 26, 2023

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Abstract

Abstract

Through analyzing the aeromagnetic and aeroradiometric results obtained in the Bayan Obo REE-Nb-Fe deposit in combination with the comprehensive comparative study of its geological characteristics, the authors found that the Bayan Obo REENb-Fe ore deposit has unique and typical aeromagnetic and aeroradiometric characteristics. The aeromagnetic anomaly characteristics show that the ore deposit is characterized by a high-intensity banded and nearly EW positive magnetic anomaly associated with a parallel positive anomaly, which is the reflection of the contact between strong magnetic orebodies and poor magnetic wall rocks. The aeromagnetic ΔT_max value is over 5000 nT, and the ΔTmin value is about -2000 nT. There are over 30 survey lines which indicate obvious positive-negative magnetic anomaly development and show that the superimposed anomaly characteristics are the reflection of magnetic rocks of varying ages and intensities. It indicates that the ore deposit has experienced superposition and transformation activities of tectonic thermal events of varying ages. The scale of ore deposit decreases gradually with the increasing depth of downward extension, but it still shows obvious positive magnetic characteristics while aeromagnetic ΔT contour exhibits upward continuation to 3000 m, which indicates that the ore deposit has obvious mineralization in the depth. In addition, the aeroradiometric characteristics of the Bayan Obo ore deposit show marked high value halos of total counting rate and potassium and uranium and thorium elements, and they all show nearly EW banded distribution. The mining area is located in the high value zone, with values between 3000 and 15381 cps and partially in lumpy form, and the range of the high value zone exceeds the range of the mining area. The potassium content is high with values between 2.0% and 2.8%, and partially even reaching 2.8%-12% in the ore deposit and adjacent areas. The thorium values are in the range of 26×10^-6-223×10^-6, and the range of thorium high value zone is larger than the range of the second intrusive carbonatite that hosted the ore deposit in the middle Caledonian. The uranium values are generally in excess of 1.6×10^-6, with higher values between 2.8×10^-6 and 9.1×10^-6 in the ore deposit and adjacent areas. Through the comprehensive analysis, it is proved that the aeromagnetic and aeroradiometric characteristics are of highly consistent with ore deposit information. The aeromagnetic positive anomalies information can be used as favorable information to look for the iron-bearing polymetallic deposits, and the radioactive elements mainly including potassium, uranium and thorium with high values can be used as favorable information to look for rare earths ore. This understanding is of great guiding significance for the further prospecting work.

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References

[1]	张培善, 陶克捷, 杨主明, 等. 白云鄂博稀土、铌钽矿物及其成因探讨[J]. 中国稀土学报, 2001, 19(2): 97-102. Zhang Peishan, Tao Kejie, Yang Zhuming, et al. Genesis of rare earths, neiobium and tantalum minerals in Bayan Obo ore deposit of China[J]. Journal of the Chinese Rare Earth Society, 2001, 19 (2): 97-102 (in Chinese with English abstract).
[2]	赖小东, 杨晓勇, 柳建勇. 白云鄂博Fe-REE-Nb建造地球化学特征及成因: 元素及同位素新证据[J]. 地质学报, 2012, 85(5): 801-818. Lai Xingdong, Yang Xingyong, Liu Jianyong. Geochemical features and its genesis of the Bayan Obo Fe-REE-Nb formation: New evidence from elements and isotopes[J]. Acta Gelogica Sinica, 2012, 85(5): 801-818 (in Chinese with English abstract).
[3]	肖荣阁, 费红彩, 安国英, 等. 内蒙古白云鄂博矿区白云岩岩石学及其成因研究[J]. 现代地质, 2003, 17: 287-303. Xiao Rongge, Fei Hongcai, An Guoying, et al. Lithology and genesis of dolomite in Baiyun Ebo mine, Inner Mongolia[J]. Geoscience, 2003, 17: 287-303 (in Chinese with English abstract).
[4]	李厚民, 王登红, 李立兴, 等. 中国铁矿成矿规律及重点矿集区资源潜力分析[J]. 中国地质, 2012, 39(3): 559-580. Li Houmin, Wang Denghong, Li Lixing, et al. Metallogeny of iron deposits and resource potential of major iron minerogenetic units in China[J]. Geology in China, 2012, 39(3): 559-580(in Chinese with English abstract).
[5]	张峰, 刘铁庚, 张凤祥. 裂变径迹法研究白云鄂博东矿的成矿时代及热历史[J]. 自然科学进展, 1997, 7(2): 202-206. Zhang Feng, Liu Tiegeng, Zhang Fengxiang. Study on the metallogenic epoch of fission track method in Baiyunebo East Mine and thermal history[J]. Progress in Natural Science, 1997, 7 (2): 202-206 (in Chinese with English abstract).
[6]	章雨旭, 江少卿, 张绮玲. 论内蒙古白云鄂博群和白云鄂博超大型稀土-铌-铁矿床成矿的年代[J]. 中国地质, 2008, 35(6): 1129-1137. Zhang Yuxu, Jiang Shaoqing, Zhang Qiling, et al. A discussion on forming time of the Bayan Obo Group and ore-forming time of the Bayan Obo giant REE-Nb-Fe deposit, Inner Mongolia[J]. Geology in China, 2008, 35(6): 1129-1137(in Chinese with English abstract).
[7]	范宏瑞, 陈福坤, 王凯怡, 等. 白云鄂博REE-Fe-Nb 矿床碳酸岩墙锆石U-Pb 年龄及其地质意义[J]. 岩石学报, 2002, 18(3): 363-368. Fan Hongrui, Chen Fukun, Wang Kaiyi, et al. Zircon U-Pb age of a carbonatite dyke from Bayan Obo REE -Fe-Nb deposit, Inner Mongolia and its geological significance[J]. Acta Petrologica Sinica, 2002, 18(3): 363-368 (in Chinese with English abstract).
[8]	范宏瑞, 胡芳芳, 陈福坤, 等. 白云鄂博超大型REE-Nb-Fe 矿区碳酸岩墙的侵位年龄[J]. 岩石学报, 2006, 22(2): 519-520. Fan Hongrui, Hu Fangfang, Chen Fukun, et al. Intrusive age of carbonatite dyke from Bayan Obo REE-Nb-Fe deposit, Inner 604 中国地质2016年 Mongolia: With answers to comment of Dr. Le Bas [J]. Acta Petrologica Sinica, 2006, 22(2): 519-520 (in Chinese with English abstract).
[9]	刘玉龙, 陈江峰, 李惠民, 等. 白云鄂博矿床白云石型矿石中独居石单颗粒U-Th-Pb-Sm-Nd 定年[J]. 岩石学报, 2005, 21(3): 881-888. Liu Yulong, Chen Jiangfeng, Li Huimin, et al. Single grain U-Th-Pb-Sm-Nd dating of monazite from dolomite type ore of the Bayan Obo deposit[J]. Acta Petrologica Sinica, 2005, 21(3): 881-888 (in Chinese with English abstract).
[10]	刘玉龙, 杨刚, 陈江峰, 等. 白云鄂博超大型稀土-铌-铁矿床黄铁矿Re-Os定年[J]. 科学通报, 2005, 50(2): 172-175. Liu Yulong, Yang Gang, Chen Jiangfeng, et al. Re-Os Dating of the pyrite in Bayan Obo Nb-REE-Fe ore deposit[J]. Chinese Science Bulletin, 2005, 50(2): 172-175 (in Chinese with English abstract).
[11]	刘玉龙, 陈江峰, 李惠民, 等. 白云鄂博矿田碳酸岩墙年代学再研究[J]. 地质论评, 2006, 52(3): 415-422. Liu Yulong, Chen Jiangfeng, Li Huimin, et al. Geochronology of the carbonatite dykes in the Bayan Obo orefield: Revisit [J]. Geological Review, 2006, 52(3): 415-422 (in Chinese with English abstract).
[12]	张宗清, 叶笑江, 袁忠信, 等. 白云鄂博稀土矿床的形成年代: Sm-Nd同位素数据[J]. 岩石矿物学杂志, 1991, 10(1): 80-83. Zhang Zongqing, Ye Xiaojiang, Yuan Zhongxin, et al. Age of the Baiyun Obo Nb-REE-Fe deposits in Inner Mongolia: the Sm-Nd isotopic data[J]. Acta Petrologica et Mineralogica, 1991, 10 (1): 80-83 (in Chinese with English abstract).
[13]	张宗清, 唐索寒, 王进辉, 等. 白云鄂博稀土矿床形成年龄的新数据[J]. 地球学报, 1994, 15(1/2): 85-93. Zhang Zongqing, Tang Suohan, Wang Jinhu, et al. New data for ore-forming age of the Bayan Obo REE deposit, Inner Mongolia[J]. Acta Geoscientia Sinica, 1994, 15(1/2): 85-93 (in Chinese with English abstract).
[14]	任英忱, 张英臣, 张宗清. 白云鄂博稀土超大型矿床的成矿时代及其主要地质热事件[J]. 地球学报, 1994, (1/2): 95-101. Ren Yingchen, Zhang Yingchen, Zhang Zongqing. Study on heatevents of ore-forming Bayan Obo deposit[J]. Acta Geosicientia Sinica, 1994, (1/2): 95-101 (in Chinese with English abstract).
[15]	刘兰笙, 高翎, 杜安道, 等. 白云鄂博稀土矿床中辉钼矿的铼-锇同位素年龄[J]. 矿床地质, 1996, 15(2): 188-192. Liu Lanshen, Gao Ling, Du Andao, et al. The Re-Os isotopic age of molybdenite from the Bayan Obo REE ore deposits [J]. Mineral Deposits, 1996, 15(2): 188-192 (in Chinese with English abstract).
[16]	裴荣富, 梅燕雄, 瞿泓滢, 等. 矿床类型模型的地质构造背景、成矿环境和容矿岩石组合[J]. 中国地质, 2013, 40(1): 31-42. Pei Rongfu, Mei Yanxiong, Qu Hongying, et al. Geological tectonic settings, depositional environments and ore-hosting rock assemblages for mineral deposits model with universality[J]. Geology in China, 2013, 40(1): 31-42(in Chinese with English abstract).
[17]	章雨旭, 吕洪波, 王俊, 等. 白云鄂博矿床成矿构造环境分析[J]. 地质学报, 2012, 86(5): 767-774. Zhang Yuxu, Lv Hongbo, Wang Jun, et al. Analysis of oreforming tectonic settings of the bayan obo REE deposit[J]. Acta Geologica Sinica, 2012, 86(5): 767-774(in Chinese with English abstract).
[18]	范宏瑞, 杨奎锋, 胡芳芳, 等. 内蒙古白云鄂博地区基底岩石锆石年代学及对构造背景的指示[J]. 岩石学报, 2010, 26(5): 1342-1350. Fan Hongrui, Yang Kuifeng, Hu Fangfang, et al. Zircon geochronology of basement rocks from the Bayan Obo area, Inner Mongolia and tectonic implications[J]. Acta Petrologica Sinica, 2010, 26(5): 1342 -1350 (in Chinese with English abstract).
[19]	杨学明, 杨晓勇, 张培善, 等. 白云鄂博REE-Nb-Fe 矿床成因的氧、碳和锶及微量元素地球化学证据[J]. 矿床地质, 1998, 41(增刊): 216-227. Yang Xuemin, Yang Xiaoyong, Zhang Peishan, et al. Rare-earth element enriched carbonatite dykes in the Bayan Obo area: the geochemical characteristics and the mechanism for REE enrichment[J]. Mineral Deposits, 1998, 41(Sup.): 216-227 (in Chinese with English abstract).
[20]	杨学明, 杨晓勇, 陈天虎, 等. 白云鄂博富稀土碳酸岩的地球化学特征[J]. 中国稀土学报, 1999, 17(4): 289-295. Yang Xueming, Yang Xiaoyong, Chen Tianhu, et al. Geochemical characteristics of a carbonatite dyke rich in rare earths from Bayan Obo, China[J]. Journal of The Chinese Rare Earths Society, 1999, 17(4): 289-295 (in Chinese with English abstract).
[21]	舒勇, 郑永飞, 魏春生, 等. 白云鄂博碳酸岩墙碳氧同位素地球化学[J]. 地球化学, 2001, 30(2): 169-176. Shu Yong, Zheng Yongfei, Wei Chunsheng, et al. Carbon and oxygen isotope geochemistry of carbonatite dykes from Bayan Obo, Inner Mongolia[J]. Geochimica, 2001, 30(2): 169-176 (in Chinese with English abstract).
[22]	李江海, 牛向龙, 程素华, 等. 大陆克拉通早期构造演化历史探讨: 以华北为例[J]. 地球科学-中国地质大学学报, 2006, 31 (3): 285-293. Li Jianghai, Niu Xianglong, Cheng Suhua, et al. The Early Precambrian tectonic evolution of continental Craton: A case study from North China[J]. Earth Science-Journal of China University of Geosciences, 2006, 31(3): 285-293 (in Chinese with English abstract).
[23]	王凯怡, 范宏瑞, 谢奕汉, 等. 白云鄂博超大型REE-Fe-Nb矿床基底杂岩的锆石U-Pb 年龄[J]. 科学通报, 2001, 46(16): 1390-1394. Wang Kaiyi, Fan Hongrui, Xie Yihan, et al. Zircon U -Pb dating of bas element gneisses of the super-large REE-Fe-Nb deposit in the Bayan Obo region, Inner Mongolia[J]. Chinese Science Bulletin, 2002, 46(16): 1390-1394 (in Chinese).
[24]	杨奎锋. 内蒙古白云鄂博地区元古代构造-岩浆演化时与超大型REE-Nb-Fe 矿床成因[D]. 中国科学院地质与地球物理研究所, 2008. Yang Kuifeng. Bayan Obo Area Inner Mongolia Proterozoic Tectono Magmatic Evolution and Super Large REE-Nb-Fe 第43卷第2 期王继春等:白云鄂博REE-Nb-Fe矿床地质与航磁、航放特征及其对找矿工作的启示605 Genesis(Ph.D thesis) [D]. China Science Institute of Geology and Geophysics, 2008 (in Chinese with English abstract).
[25]	毛景文, 张作衡, 裴荣富. 中国矿床模型概论[M]. 北京: 地质出版社, 2012: 349-354. Mao Jingwen, Zhang Zuoheng, Pei Rongfu. Introduction of Deposit Model in China[M]. Beijing: Geological Publishing House, 2012: 349-354 (in Chinese with English abstract).
[26]	张培善, 陶克捷, 杨主明, 等. 白云鄂博稀土、铌钽矿物及其成因探讨[J]. 中国稀土学报, 2001, 19(2): 97-102. Zhang Peishan, Tao Kejie, Yang Zhuming, et al. Genesis of rare earths, niobium and tantalum minerals in Bayan Obo ore deposit of China[J]. Journal of the Chinese Rare Earth Society, 2001, 19 (2): 97-102 (in Chinese with English abstract).
[27]	刘健, 等. 白云鄂博矿床基底岩石的年代学研究及其地质意义[J]. 地球化学, 2011, 40(3): 209-222. Liu Jian, et al. Chronology and geological significance of the basement rock of the giant Bayan Obo REE-Nb-Fe ore deposit[J]. Geochimica, 2011, 40(3): 209-222 (in Chinese with English abstract).
[28]	Nakai S, Masuda A, Shimizu H, et al. La-Ba dating and Nd and Sr isotope studies on Bayan Obo rare earth element ore deposit, Inner Mongolia, China[J]. Economic Geology, 1989, 84: 2296-2299.
[29]	范宏瑞, 胡芳芳, 杨奎锋, 等. 白云鄂博超大型稀土-铌-铁矿床成矿过程中的流体不混溶作用[J]. 矿床地质, 2006, 25: 163-166. Fan Hongrui, Hu Fangfang, Yang Kuifeng, et al. Fluid immiscibility as an ore-forming process in the superlarge REENb-Fe deposit, Inner Mongolian, China[J]. Mineral Deposits, 2006, 25: 163-166 (in Chinese with English abstract).
[30]	Le Bas M J, Yang X M, Taylor R N, et al. New evidence from a calcite-dolomite carbonate dyke for the magmatic origin of the massive Bayan Obo ore-bearing dolomite marble, Inner Mongolia, China[J]. Mineralogy and Petrology, 2007, 91(3/4): 281-307.
[31]	张宗清, 唐索寒, 袁忠信, 等. 白云鄂博矿床白云岩的Sm-Nd、 Rb-Sr 同位素体系[J]. 岩石学报, 2001, 17(4): 637-642. Zhang Zongqing, Tang Suohan, Yuan Zhongxin, et al. The Sm-Nd and Rb-Sr isotopic systems of the dolomites in the Bayan Obo ore deposit, Inner Mongolia, China [J]. Acta Petrologica Sinica, 2001, 17(4): 637-642 (in Chineset with English abstract).
[32]	张宗清, 袁忠信, 唐索寒, 等. 白云鄂博矿床年龄和地球化学[M]. 北京: 地质出版社, 2003: 1-222. Zhang Zongqing, Yuan Zhongxin, Tang Suohan, et al. Age and Geochemistry of the Bayan Obo Ore Deposit[M]. Beijing: Geological Publishing House, 2003: 1-222 (in Chinese with English abstract).
[33]	张宗清, 唐索寒, 王进辉, 等. 白云鄂博矿床形成于不同时代的信息-矿床西矿体的年龄和讨论[J]. 中国地质, 2003, 30(2): 130-137. Zhang Zongqing, Tang Suohan, Wang Jinhui, et al. Information about ore deposit formation in different epochs: Age of the west orebodies of the Bayan Obo deposit with a discussion[J]. Geology in China, 2003, 30(2): 130-137(in Chinese with English abstract).
[34]	裘愉卓. 白云鄂博独居石SHRIMP 定年的思考[J]. 地球学报, 1997, 18(增刊): 211-213. Qiu Yuzhuo. Thought on SHRIMP dating of Bayan Obo monazite[J]. Acta Geoscientia Sinica, 1997, 18(Supp.): 211-213 (in Chinese with English abstract).
[35]	白鸽, 袁忠信. 白云鄂博矿床地质特征和成因讨论[M]. 北京: 地质出版社, 1996: 1-104. Bai Ge, Yuan Zhongxin. Demonstration on the Geological Features and Genesis of the Bayan Obo Ore Deposit[M]. Beijing: Geological Publishing House, 1996: 1-104 (in Chinese with English abstract).
[36]	肖荣阁, 刘敬党, 费红彩, 等. 白云鄂博REE-Nb-Fe 矿床的富钠岩石类型及成因分析[J]. 现代地质, 2006, 20(1): 151-164. Xiao Rongge, Liu Jingdang, Fei Hongcai, et al. Types and genesis of Na-rich rocks in the Bayan Obo REE-Nb-Fe deposit, Inner Mongolia, China[J]. Geoscience, 2006, 20(1): 151-164 (in Chinese with English abstract).
[37]	翟裕生, 邓军, 汤中立, 等. 古陆边缘成矿系统[M]. 北京: 地质出版社, 2002. Zhai Yusheng, Deng Jun, Tang Zhongli, et al. Metallogenic System of Continental Margin[M]. Beijing: Geological Publishing House, 2002(in Chinese with English abstract).
[38]	翟裕生. 论成矿系统[J]. 地学前缘, 1999, 6(1): 14-28. Zhai Yushen. On The Metallogenic System[J]. Earth Science Frontiers, 1999, 6(1): 14-28(in Chinese with English abstract).
[39]	翟裕生, 邓军, 李晓波. 区域成矿学[M]. 北京: 地质出版社, 1999: 1-287. Zhai Yusheng, Deng Jun, Li Xiaobo. Regional Metallogeny[M]. Beijing: Geological Publishing House, 1999: 1-287 (in Chinese with English abstract).
[40]	翟裕生. 中国区域成矿特征及若干值得重视的成矿环境[J]. 中国地质, 2003, 30(4): 337-342. Zhai Yusheng. Regional metallogenic features and some important ore-forming environments of China[J]. Geology in China, 2003, 30(4): 337-342(in Chinese with English abstract).

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A comprehensive comparative study of geological characteristics as well as aeromagnetic and aeroradiometric features of the Bayan Obo REE-Nb-Fe depoits and their implications for prospecting work

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