Application of automated mineral analysis systems in geochemical exploration of carbonatite-related REE deposits
LIU Dong-Sheng1,2,3(), CHEN Yuan-Yuan4
1. Key Laboratory of Geochemical Exploration, Ministry of Natural Resources, Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China 2. International Centre on Global-Scale Geochemistry, United Nations Educational Scientific and Cultural Organization, Langfang 065000, China 3. School of Earth Sciences and Resources,China University of Geosciences (Beijing), Beijing 100083, China 4. Hebei Institute of Regional Geological Survey, Langfang 065000,China
In recent years, China has been strengthening the exploration of rare earth resources in order to secure the status of China as a large rare earth resource country. Geochemical exploration is an important means of mineral exploration, This paper summarizes the geochemical exploration of rare earth, finds out the existing problems and puts forward solutions. The carbonatite related rare earth anomalies are characterized by low contrast and small scale, the reasons are: ① the industrial grade of rare earth ore is enriched to a low degree relative to the abundance of the earth's crust, which is easily diluted by non-mineral anomalies caused by granite, etc.; ②the size of rare earth ore-forming indicator minerals are small and difficult to sort by traditional method, thus the epigenetic migration and enrichment pattern is not well understood, and it is difficult to develop a targeted sampling method. The automatic mineral analysis system based on scanning electron microscopy and energy spectrum can realize the quantitative statistics of chemical composition and morphological parameters of rare earth minerals at the micron level, which provides the basis for the study of epigenetic migration pattern of rare earth minerals. In recent years, in the field of geochemical exploration, previous research on the variation pattern of micro scale grain mineral content in the ore body-stream sediment system using the automatic mineral analysis system has shown the good application prospect of this method. In the future, the automatic mineral analysis system can be used to carry out:①research on the change of rare earth mineral size during weathering process; ②research on the migration and enrichment of rare earth minerals in the ore body-aqueous sediment system. Thus, the distribution characteristics and migration and enrichment rules of rare earth indicative minerals in ore-body, soil-stream sediment system are clarified, providing theoretical support for geochemical exploration of rare earth.
刘东盛, 陈圆圆. 矿物自动分析系统在碳酸岩型稀土地球化学勘查中的应用[J]. 物探与化探, 2022, 46(3): 637-644.
LIU Dong-Sheng, CHEN Yuan-Yuan. Application of automated mineral analysis systems in geochemical exploration of carbonatite-related REE deposits. Geophysical and Geochemical Exploration, 2022, 46(3): 637-644.
U.S. Department of Defense. Strategic and critical materials 2013 report on stockpile requirements[R]. Office of the Under Secretary of Defense for Acquisition, Technology and Logistics, 2013:189.
Chen J B, Huo W M, Li X F, et al. Comparative analysis of rare earth resources situation between China, the U. S. and EU[J]. Natural Resource Economics of China, 2020, 33(8): 8-12.
Zhang H T, Mou X Z, Sun W K, et al. History of prospecting and discovery in China:Geophysical and geochemical exploration volume[M]. Beijing: Geological Publishing House, 2002: 591-594.
Liu D S, Zhou J, Yan T T, et al. Geochemical background of REEs: Super-enrichment in argillaceous rocks in Tengchong block[J]. Acta Geoscientia Sinica, 2020, 41(6): 756-769.
Fan H R, Niu H C, Li X C, et al. The types, ore genesis and resource perspective of endogenic REE deposits in China[J]. Chinese Science Bulletin, 2020, 65(33): 134-149.
Wang X Q, Zhou J, Chi Q H, et al. Geochemical background and distribution of rare earth elements in China: Implications for potential prospects[J]. Acta Geoscientia Sinica, 2020, 41(6): 747-758.
[8]
林传仙, 刘义茂, 王中刚, 等. 中国矿床[M]. 北京: 地质出版社, 1996.
[8]
Lin C X, Liu Y M, Wang Z G, et al. China's deposit[M]. Beijing: Geological Publishing House, 1996.
Xie Y L, Xia J M, Cui K, et al. Rare earth elements deposits in China: Apatio-temporal distribution and ore-forming processes[J]. Chinese Science Bulletin, 2020, 65(33): 150-164.
Song W L, Xu C, Wang L J, et al. Review of the metallogenesis of the endogenetic rare earth elements deposits related to carbonatite-alkaline complex[J]. Journal of Peking University: Natural Science Edition, 2013, 49(4): 725-740.
Shi Z M, Ye Y L. Bastnaesitefrom rare earth mining in Maoniuping, Sichuan province[J]. Petrology, 1993, 13(3): 42-47.
[14]
Zajac I S. John Jambor’s contributions to the mineralogy of the Strange Lake peralkaline complex, Quebec-Labrador, Canada[J]. The Canadian Mineralogist, 2015, 53: 885-894.
doi: 10.3749/canmin.1400051
[15]
Orris G J, Grauch R I. Rare earth element mines, deposits, and occurrences[R]. Open-File Rep 02-189. Reston: US Geological Survey, 2002:28-57.
[16]
Kanazawa Y, Kamitani M. Rare earth minerals and resources in the world[J]. Journal of Alloys and Compounds, 2006, 408-412: 1339-1343.
doi: 10.1016/j.jallcom.2005.04.033
[17]
Hawkes H E, Webb J S. Geochemistry in mineral exploration[M]. New York: Harper & Row Publishers, 1962.
[18]
Salminen R, Batista M J, Bidovec M, et al. FOREGS geochemical atlas of Europe, Part 1: Background information, methodology and maps[M]. Espoo: Geological Survey of Finland, 2005.
[19]
谢学锦, 任天祥, 孙焕振. 中国地球化学图集[M]. 北京: 地质出版社, 2012.
[19]
Xie X J, Ren T X, Sun H Z. Geochemical atlas of China[M]. Beijing: Geological Publishing House, 2012.
[20]
Wang X Q, the CGB Sampling Team. China geochemical baselines: Sampling methodology[J]. Journal of Geochemical Exploration, 2015, 148: 25-39.
doi: 10.1016/j.gexplo.2014.05.018
Xie X J, Ren T X, Xi X H, et al. The implementation of the regional geochemistry-national reconnaissance program (RGNR) in China in the past thirty years[J]. Acta Geoscientia Sinica, 2009, 30(6):12-28.
[22]
陆正敏, 程正海. 中国矿床发现史:内蒙古卷[M]. 北京: 地质出版社, 1996.
[22]
Lu Z M, Cheng Z H. History of discovery of ore deposits in China:Inner Mongolia volume[M]. Beijing: Geological Publishing House, 1996.
[23]
刘英俊, 曹励明, 李兆麟. 元素地球化学[M]. 北京: 科学出版社, 1984.
[23]
Liu Y J, Cao L M, Li Z L. Elements geochemistry[M]. Beijing: Science Press, 1984.
Xu S Q, Zeng H P, Zhang H. Beneficiation-metallurgy combination technology of Zhushan Miaoya rare earth mine[J]. China Mine Engineering 2017, 46(5): 15-20.
Ma Y, Li N, Wang Q W, et al. Characteristics and current research situation of rare earth resources in Bayan Obo ore[J]. Journal of The Chinese Society of Rare Earths, 2016, 34(6): 641-649.
[32]
Lehtonen M, Laukkanen J, Sarala P. Exploring for RE and REE mineralization using indicator minerals[C]// Rovaniemi:25th International Applied Geochemistry Symposium, 2011:13-18.
[33]
Lehtonen M, Yann L, Hugh O, et al. Novel technologies for indicator mineral-based exploration[R]. Geological Survey of Finland, 2015:23-62.
[34]
Mackay D A R, Simandl G J, Ma W, et al. Indicator mineral-based exploration for carbonatites and related specialty metal deposits:A QEMSCAN orientation survey, British Columbia, Canada[J]. Journal of Geochemical Exploration, 2016, 165: 159-173.
doi: 10.1016/j.gexplo.2016.03.005
[35]
Mcclenaghan B R, Paulen C, Kjarsgaard I M. Rare metal indicator minerals in bedrock and till at the Strange Lake peralkaline complex, Quebec and Labrador, Canada[J]. Can. J. Earth Sci., 2019, 56: 857-869.
doi: 10.1139/cjes-2018-0299
Xie X J, Hou Z H. Geochemical exploration of gold deposits (1): Present situation and research direction of geochemical exploration of gold deposits[J]. Journal of Changchun University of Earth Sciences, 1987, 7(4): 361-372.
Xie X J. Geochemical exploration of gold deposits (2): Difficulties in sampling and sampling · for the 100th issue of Foreign Geoexploration Technology[J]. Foreign Geoexploration Technology, 1988(Z1): 150-158.
Xie X J, Wang X Q. Geochemical exploration of gold deposit (3): Study on the relationship between gold particle distribution and sampling error[J]. Geophysical and Geochemical Exploration, 1992, 16(6): 23-34.
Wang X Q, Xie X J. Unconventional geochemical exploration for gold[J]. Acta Geologica Sinica, 1996, 70(1): 86-97.
[40]
Chakhmouradian A R, Wall F. Rare earth elements: Minerals, mines, magnets (and more)[J]. Elements, 2012, 8(5): 333-340.
doi: 10.2113/gselements.8.5.333
[41]
Sanematsu K, Kon Y, Imai A, et al. Geochemical and mineralogical characteristics of ion-adsorption type REE mineralization in Phuket, Thailand[J]. Mineralium Deposita, 2013, 48(4): 437-451.
doi: 10.1007/s00126-011-0380-5
[42]
Berger A, Janots E, Gnos E, et al. Rare earth element mineralogy and geochemistry in a laterite profile from Madagascar[J]. Applied Geochemistry, 2014, 41: 218-228.
doi: 10.1016/j.apgeochem.2013.12.013
Lu L, Wang D H, Wang C H, et al. Mineralization regularity of ion-adsorption type REE deposits on Lincang granite in Yunnan Province[J]. Acta Geologica Sinica, 2019, 93(6): 1466-1478.
[44]
Layton-Matthews C H, McClengahan M B. Mineral chemistry: Modern techniques and applications to exploration[C]// Application of Indicator Mineral Methods to Mineral Exploration, 2014:9-18.
[45]
Zaitsev A N, Wall F, Lebas M J. REE-Sr-Ba minerals from the Khibina carbonatites, Kola Peninsula, Russia: Their mineralogy, paragenesis and evolution[J]. Miner. Mag., 1998, 62: 225-250.
doi: 10.1180/002646198547594
[46]
Butcher A R, Helms T A, Gottlieb P, et al. Advances in the quantification of gold deportament by QemSCAN[C]// Proceedings of 7th Mill Operators Conference, 2000:267-271.
[47]
Burrows D, Gu Y. JRMRC mineral liberation analyser — A modern tool for ore characterisation and plant optimisation[J]. Metallurgical Plant Design and Operating Strategies, 2006, 9:125-139.
You Y, Niu X B, Feng S B, et al. Study of pore features in Chang7 tight oil reservoir,Yanchang layer,Ordos Basin[J]. Journal of China University of Petroleum, 2014, 38(6): 18-23.
[49]
Santoro L, Rollinson G K, Boni M, et al. Automated scanning electron microscopy (QEMSCAN)-based mineral identification and quantification of the Jabali Zn-Pb-Ag nonsulfide deposit (Yemen)[J]. Economic Geology, 2015, 110(4): 1083-1099.
doi: 10.2113/econgeo.110.4.1083
[50]
Vermeesch P, Rittner M, Petrou E, et al. High throughput petrochronology and sedimentary provenance analysis by automated phase mapping and LA-ICP-MS[J]. Geochem. Geophys. Geosystems, 2017, 18: 4096-4109.
doi: 10.1002/2017GC007109
[51]
Sven S, Franz M. Automated quantitative rare earth elements mineralogy by scanning electron microscopy[J]. Physical Sciences Reviews, 2016, 1(9):63.
[52]
Grammatikopoulosa T, Howardb S, Alexanderc C, et al. Investigation of low-grade REE offshore sands from North and South Carolina, and Georgia, USA, using automated mineralogy[J]. Journal of Geochemical Exploration, 2020, 202: 1-14.
doi: 10.1016/j.gexplo.2019.03.004
[53]
Garzanti E, Andò S, Vezzoli G. Grain-size dependence of sediment composition and environmental bias in provenance studies[J]. Earth Planet. Sci. Lett., 2009, 277: 422-432.
doi: 10.1016/j.epsl.2008.11.007
[54]
Stendal H, Theobald P K. Heavy-mineral concentrates in geochemical exploration[J]. Handbook of Exploration Geochemistry, 1994, 6:185-225.
[55]
Fletcher W K, Loh C. Transport of cassiterite in a Malaysian stream: Implications geochemical exploration[J]. Journal of Geochemical Exploration, 1996, 57: 9-20.
doi: 10.1016/S0375-6742(96)00012-X